LGPL-3.0

@@ -0,0 +1,165 @@
+                   GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
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+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
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+
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LICENSE

@@ -1,13 +1,14 @@
 Copyright (c) 2020-2022 Samuel L Sloniker
 
 This program is free software: you can redistribute it and/or modify it under
-the terms of the GNU General Public License as published by the Free Software
+the terms of the GNU Lesser General Public License as published by the Free
-Foundation, either version 3 of the License, or (at your option) any later
+Software Foundation, either version 3 of the License, or (at your option) any
-version.
+later version.
 
 This program is distributed in the hope that it will be useful, but WITHOUT ANY
 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 PARTICULAR PURPOSE. See the GNU General Public License for more details.
 
-You should have received a copy of the GNU General Public License along with
+You should have received copies of the GNU General Public License and the GNU
-this program. If not, see <https://www.gnu.org/licenses/>. 
+Lesser General Public License along with this program. If not, see
+<https://www.gnu.org/licenses/>. 

README.md

@@ -4,142 +4,78 @@ General-purpose text classifier in Python
 
 GPTC provides both a CLI tool and a Python library.
 
-## Installation
-
-    pip install gptc
-
 ## CLI Tool
 
 ### Classifying text
 
-    gptc classify [-n <max_ngram_length>] <compiled model file>
+    python -m gptc classify [-n <max_ngram_length>] <compiled model file>
 
 This will prompt for a string and classify it, then print (in JSON) a dict of
 the format `{category: probability, category:probability, ...}` to stdout. (For
 information about `-n <max_ngram_length>`, see section "Ngrams.")
 
-### Checking individual words or ngrams
+Alternatively, if you only need the most likely category, you can use this:
 
-    gptc check <compiled model file> <token or ngram>
+    python -m gptc classify [-n <max_ngram_length>] <-c|--category> <compiled model file>
 
-This is very similar to `gptc classify`, except it takes the input as an
+This will prompt for a string and classify it, outputting the category on
-argument, and it treats the input as a single token or ngram.
+stdout (or "None" if it cannot determine anything).
 
 ### Compiling models
 
-    gptc compile [-n <max_ngram_length>] [-c <min_count>] <raw model file> <compiled model file>
+    python -m gptc compile [-n <max_ngram_length>] <raw model file>
 
-This will write the compiled model encoded in binary format to `<compiled model
+This will print the compiled model in JSON to stdout.
-file>`.
-
-If `-c` is specified, words and ngrams used less than `min_count` times will be
-excluded from the compiled model.
-
-### Packing models
-
-    gptc pack <dir>
-
-This will print the raw model in JSON to stdout. See `models/unpacked/` for an
-example of the format. Any exceptions will be printed to stderr.
 
 ## Library
 
-### `Model.serialize(file)`
+### `gptc.Classifier(model, max_ngram_length=1)`
 
-Write binary data representing the model to `file`.
+Create a `Classifier` object using the given *compiled* model (as a dict, not
+JSON).
 
-### `Model.deserialize(encoded_model)`
+For information about `max_ngram_length`, see section "Ngrams."
 
-Deserialize a `Model` from a file containing data from `Model.serialize()`.
+#### `Classifier.confidence(text)`
-
-### `Model.confidence(text, max_ngram_length)`
 
 Classify `text`. Returns a dict of the format `{category: probability,
 category:probability, ...}`
 
-Note that this may not include values for all categories. If there are no
+#### `Classifier.classify(text)`
-common words between the input and the training data (likely, for example, with
-input in a different language from the training data), an empty dict will be
-returned.
 
-For information about `max_ngram_length`, see section "Ngrams."
+Classify `text`. Returns the category into which the text is placed (as a
-
+string), or `None` when it cannot classify the text.
-### `Model.get(token)`
-
-Return a confidence dict for the given token or ngram. This function is very
-similar to `Model.confidence()`, except it treats the input as a single token
-or ngram.
-
-### `Model.compile(raw_model, max_ngram_length=1, min_count=1, hash_algorithm="sha256")`
 
+### `gptc.compile(raw_model, max_ngram_length=1)`
 Compile a raw model (as a list, not JSON) and return the compiled model (as a
-`gptc.Model` object).
+dict).
 
 For information about `max_ngram_length`, see section "Ngrams."
 
-Words or ngrams used less than `min_count` times throughout the input text are
-excluded from the model.
-
-The hash algorithm should be left as the default, which may change with a minor
-version update, but it can be changed by the application if needed. It is
-stored in the model, so changing the algorithm does not affect compatibility.
-The following algorithms are supported:
-
-* `md5`
-* `sha1`
-* `sha224`
-* `sha256`
-* `sha384`
-* `sha512`
-* `sha3_224`
-* `sha3_384`
-* `sha3_256`
-* `sha3_512`
-* `shake_128`
-* `shake_256`
-* `blake2b`
-* `blake2s`
-
-### `gptc.pack(directory, print_exceptions=False)`
-
-Pack the model in `directory` and return a tuple of the format:
-
-    (raw_model, [(exception,),(exception,)...])
-
-Note that the exceptions are contained in single-item tuples. This is to allow
-more information to be provided without breaking the API in future versions of
-GPTC.
-
-See `models/unpacked/` for an example of the format.
-
-### `gptc.Classifier(model, max_ngram_length=1)`
-
-`Classifier` objects are deprecated starting with GPTC 3.1.0, and will be
-removed in 5.0.0. See [the README from
-3.0.2](https://git.kj7rrv.com/kj7rrv/gptc/src/tag/v3.0.1/README.md) if you need
-documentation.
-
 ## Ngrams
 
 GPTC optionally supports using ngrams to improve classification accuracy. They
-are disabled by default (maximum length set to 1) for performance reasons.
+are disabled by default (maximum length set to 1) for performance and
-Enabling them significantly increases the time required both for compilation
+compatibility reasons. Enabling them significantly increases the time required
-and classification. The effect seems more significant for compilation than for
+both for compilation and classification. The effect seems more significant for
-classification. Compiled models are also much larger when ngrams are enabled.
+compilation than for classification. Compiled models are also much larger when
-Larger maximum ngram lengths will result in slower performance and larger
+ngrams are enabled. Larger maximum ngram lengths will result in slower
-files. It is a good idea to experiment with different values and use the
+performance and larger files. It is a good idea to experiment with different
-highest one at which GPTC is fast enough and models are small enough for your
+values and use the highest one at which GPTC is fast enough and models are
-needs.
+small enough for your needs.
 
 Once a model is compiled at a certain maximum ngram length, it cannot be used
 for classification with a higher value. If you instantiate a `Classifier` with
 a model compiled with a lower `max_ngram_length`, the value will be silently
 reduced to the one used when compiling the model.
 
+Models compiled with older versions of GPTC which did not support ngrams are
+handled the same way as models compiled with `max_ngram_length=1`.
+
 ## Model format
 
-This section explains the raw model format, which is how models are created and
+This section explains the raw model format, which is how you should create and
-edited.
+edit models.
 
 Raw models are formatted as a list of dicts. See below for the format:
 
@@ -150,14 +86,10 @@ Raw models are formatted as a list of dicts. See below for the format:
         }
     ]
 
-GPTC handles raw models as `list`s of `dict`s of `str`s (`List[Dict[str,
+GPTC handles models as Python `list`s of `dict`s of `str`s (for raw models) or
-str]]`), and they can be stored in any way these Python objects can be.
+`dict`s of `str`s and `float`s (for compiled models), and they can be stored
-However, it is recommended to store them in JSON format for compatibility with
+in any way these Python objects can be. However, it is recommended to store
-the command-line tool.
+them in JSON format for compatibility with the command-line tool.
-
-## Emoji
-
-GPTC treats individual emoji as words.
 
 ## Example model
 

benchmark.py

@@ -1,5 +1,3 @@
-# SPDX-License-Identifier: GPL-3.0-or-later
-
 import timeit
 import gptc
 import json
@@ -25,7 +23,7 @@ print(
     round(
         1000000
         * timeit.timeit(
-            "gptc.Model.compile(raw_model, max_ngram_length)",
+            "gptc.compile(raw_model, max_ngram_length)",
             number=compile_iterations,
             globals=globals(),
         )
@@ -35,9 +33,7 @@ print(
 )
 
 
-classifier = gptc.Classifier(
+classifier = gptc.Classifier(gptc.compile(raw_model, max_ngram_length), max_ngram_length)
-    gptc.compile(raw_model, max_ngram_length), max_ngram_length
-)
 print(
     "Average classification time over",
     classify_iterations,

gptc/__init__.py

@@ -1,12 +1,7 @@
-# SPDX-License-Identifier: GPL-3.0-or-later
+# SPDX-License-Identifier: LGPL-3.0-or-later
 
 """General-Purpose Text Classifier"""
 
-from gptc.pack import pack
+from gptc.compiler import compile
-from gptc.model import Model
+from gptc.classifier import Classifier
-from gptc.tokenizer import normalize
+from gptc.exceptions import *
-from gptc.exceptions import (
-    GPTCError,
-    ModelError,
-    InvalidModelError,
-)

gptc/__main__.py

@@ -1,87 +1,57 @@
 #!/usr/bin/env python3
-# SPDX-License-Identifier: GPL-3.0-or-later
+# SPDX-License-Identifier: LGPL-3.0-or-later
 
 import argparse
 import json
 import sys
 import gptc
 
-
+def main():
-def main() -> None:
     parser = argparse.ArgumentParser(
         description="General Purpose Text Classifier", prog="gptc"
     )
     subparsers = parser.add_subparsers(dest="subparser_name", required=True)
 
-    compile_parser = subparsers.add_parser(
+    compile_parser = subparsers.add_parser("compile", help="compile a raw model")
-        "compile", help="compile a raw model"
-    )
     compile_parser.add_argument("model", help="raw model to compile")
-    compile_parser.add_argument(
+    compile_parser.add_argument("--max-ngram-length", "-n", help="maximum ngram length", type=int, default=1)
-        "out", help="name of file to write compiled model to"
-    )
-    compile_parser.add_argument(
-        "--max-ngram-length",
-        "-n",
-        help="maximum ngram length",
-        type=int,
-        default=1,
-    )
-    compile_parser.add_argument(
-        "--min-count",
-        "-c",
-        help="minimum use count for word/ngram to be included in model",
-        type=int,
-        default=1,
-    )
 
     classify_parser = subparsers.add_parser("classify", help="classify text")
     classify_parser.add_argument("model", help="compiled model to use")
-    classify_parser.add_argument(
+    classify_parser.add_argument("--max-ngram-length", "-n", help="maximum ngram length", type=int, default=1)
-        "--max-ngram-length",
+    group = classify_parser.add_mutually_exclusive_group()
-        "-n",
+    group.add_argument(
-        help="maximum ngram length",
+        "-j",
-        type=int,
+        "--json",
-        default=1,
+        help="output confidence dict as JSON (default)",
+        action="store_true",
     )
-
+    group.add_argument(
-    check_parser = subparsers.add_parser(
+        "-c",
-        "check", help="check one word or ngram in model"
+        "--category",
+        help="output most likely category or `None`",
+        action="store_true",
     )
-    check_parser.add_argument("model", help="compiled model to use")
-    check_parser.add_argument("token", help="token or ngram to check")
-
-    pack_parser = subparsers.add_parser(
-        "pack", help="pack a model from a directory"
-    )
-    pack_parser.add_argument("model", help="directory containing model")
 
     args = parser.parse_args()
 
-    if args.subparser_name == "compile":
+    with open(args.model, "r") as f:
-        with open(args.model, "r", encoding="utf-8") as input_file:
+        model = json.load(f)
-            model = json.load(input_file)
 
-        with open(args.out, "wb+") as output_file:
+    if args.subparser_name == "compile":
-            gptc.Model.compile(
+        print(json.dumps(gptc.compile(model, args.max_ngram_length)))
-                model, args.max_ngram_length, args.min_count
+    else:
-            ).serialize(output_file)
+        classifier = gptc.Classifier(model, args.max_ngram_length)
-    elif args.subparser_name == "classify":
-        with open(args.model, "rb") as model_file:
-            model = gptc.Model.deserialize(model_file)
 
         if sys.stdin.isatty():
             text = input("Text to analyse: ")
         else:
             text = sys.stdin.read()
 
-        print(json.dumps(model.confidence(text, args.max_ngram_length)))
+        if args.category:
-    elif args.subparser_name == "check":
+            print(classifier.classify(text))
-        with open(args.model, "rb") as model_file:
+        else:
-            model = gptc.Model.deserialize(model_file)
+            print(json.dumps(classifier.confidence(text)))
-        print(json.dumps(model.get(args.token)))
-    else:
-        print(json.dumps(gptc.pack(args.model, True)[0]))
 
 
 if __name__ == "__main__":

gptc/classifier.py

@@ -0,0 +1,96 @@
+# SPDX-License-Identifier: LGPL-3.0-or-later
+
+import gptc.tokenizer, gptc.compiler, gptc.exceptions, gptc.weighting
+import warnings
+
+
+class Classifier:
+    """A text classifier.
+
+    Parameters
+    ----------
+    model : dict
+        A compiled GPTC model.
+
+    max_ngram_length : int
+        The maximum ngram length to use when tokenizing input. If this is
+        greater than the value used when the model was compiled, it will be
+        silently lowered to that value.
+
+    Attributes
+    ----------
+    model : dict
+        The model used.
+
+    """
+
+    def __init__(self, model, max_ngram_length=1):
+        if model.get("__version__", 0) != 3:
+            raise gptc.exceptions.UnsupportedModelError(
+                f"unsupported model version"
+            )
+        self.model = model
+        self.max_ngram_length = min(
+            max_ngram_length, model.get("__ngrams__", 1)
+        )
+
+    def confidence(self, text):
+        """Classify text with confidence.
+
+        Parameters
+        ----------
+        text : str
+            The text to classify
+
+        Returns
+        -------
+        dict
+            {category:probability, category:probability...} or {} if no words
+            matching any categories in the model were found
+
+        """
+
+        model = self.model
+
+        text = gptc.tokenizer.tokenize(text, self.max_ngram_length)
+        probs = {}
+        for word in text:
+            try:
+                weight, weighted_numbers = gptc.weighting.weight(
+                    [i / 65535 for i in model[word]]
+                )
+                for category, value in enumerate(weighted_numbers):
+                    try:
+                        probs[category] += value
+                    except KeyError:
+                        probs[category] = value
+            except KeyError:
+                pass
+        probs = {
+            model["__names__"][category]: value
+            for category, value in probs.items()
+        }
+        total = sum(probs.values())
+        probs = {category: value / total for category, value in probs.items()}
+        return probs
+
+    def classify(self, text):
+        """Classify text.
+
+        Parameters
+        ----------
+        text : str
+            The text to classify
+
+        Returns
+        -------
+        str or None
+            The most likely category, or None if no words matching any
+            category in the model were found.
+
+        """
+        probs = self.confidence(text)
+        try:
+            return sorted(probs.items(), key=lambda x: x[1])[-1][0]
+        except IndexError:
+            return None

gptc/compiler.py

@@ -0,0 +1,73 @@
+# SPDX-License-Identifier: LGPL-3.0-or-later
+
+import gptc.tokenizer
+
+
+def compile(raw_model, max_ngram_length=1):
+    """Compile a raw model.
+
+    Parameters
+    ----------
+    raw_model : list of dict
+        A raw GPTC model.
+
+    max_ngram_length : int
+        Maximum ngram lenght to compile with.
+
+    Returns
+    -------
+    dict
+        A compiled GPTC model.
+
+    """
+
+    categories = {}
+
+    for portion in raw_model:
+        text = gptc.tokenizer.tokenize(portion["text"], max_ngram_length)
+        category = portion["category"]
+        try:
+            categories[category] += text
+        except KeyError:
+            categories[category] = text
+
+    categories_by_count = {}
+
+    names = []
+
+    for category, text in categories.items():
+        if not category in names:
+            names.append(category)
+
+        categories_by_count[category] = {}
+        for word in text:
+            try:
+                categories_by_count[category][word] += 1 / len(
+                    categories[category]
+                )
+            except KeyError:
+                categories_by_count[category][word] = 1 / len(
+                    categories[category]
+                )
+    word_weights = {}
+    for category, words in categories_by_count.items():
+        for word, value in words.items():
+            try:
+                word_weights[word][category] = value
+            except KeyError:
+                word_weights[word] = {category: value}
+
+    model = {}
+    for word, weights in word_weights.items():
+        total = sum(weights.values())
+        model[word] = []
+        for category in names:
+            model[word].append(
+                round((weights.get(category, 0) / total) * 65535)
+            )
+
+    model["__names__"] = names
+    model["__ngrams__"] = max_ngram_length
+    model["__version__"] = 3
+
+    return model

gptc/exceptions.py

@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: GPL-3.0-or-later
+# SPDX-License-Identifier: LGPL-3.0-or-later
 
 
 class GPTCError(BaseException):
@@ -9,5 +9,5 @@ class ModelError(GPTCError):
     pass
 
 
-class InvalidModelError(ModelError):
+class UnsupportedModelError(ModelError):
     pass

gptc/model.py

@@ -1,322 +0,0 @@
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-from typing import (
-        Iterable,
-        Mapping,
-    List,
-    Dict,
-    cast,
-    BinaryIO,
-    Tuple,
-    TypedDict,
-)
-import json
-import gptc.tokenizer
-from gptc.exceptions import InvalidModelError
-import gptc.weighting
-
-def _count_words(
-    raw_model: Iterable[Mapping[str, str]],
-    max_ngram_length: int,
-    hash_algorithm: str,
-) -> Tuple[Dict[int, Dict[str, int]], Dict[str, int], List[str]]:
-    word_counts: Dict[int, Dict[str, int]] = {}
-    category_lengths: Dict[str, int] = {}
-    names: List[str] = []
-
-    for portion in raw_model:
-        text = gptc.tokenizer.hash_list(
-            gptc.tokenizer.tokenize(portion["text"], max_ngram_length),
-            hash_algorithm,
-        )
-        category = portion["category"]
-
-        if not category in names:
-            names.append(category)
-
-        category_lengths[category] = category_lengths.get(category, 0) + len(
-            text
-        )
-
-        for word in text:
-            if word in word_counts:
-                try:
-                    word_counts[word][category] += 1
-                except KeyError:
-                    word_counts[word][category] = 1
-            else:
-                word_counts[word] = {category: 1}
-
-    return word_counts, category_lengths, names
-
-
-def _get_weights(
-    min_count: int,
-    word_counts: Dict[int, Dict[str, int]],
-    category_lengths: Dict[str, int],
-    names: List[str],
-) -> Dict[int, List[int]]:
-    model: Dict[int, List[int]] = {}
-    for word, counts in word_counts.items():
-        if sum(counts.values()) >= min_count:
-            weights = {
-                category: value / category_lengths[category]
-                for category, value in counts.items()
-            }
-            total = sum(weights.values())
-            new_weights: List[int] = []
-            for category in names:
-                new_weights.append(
-                    round((weights.get(category, 0) / total) * 65535)
-                )
-            model[word] = new_weights
-    return model
-
-class ExplanationEntry(TypedDict):
-    weight: float
-    probabilities: Dict[str, float]
-    count: int
-
-
-Explanation = Dict[
-    str,
-    ExplanationEntry,
-]
-
-Log = List[Tuple[str, float, List[float]]]
-
-
-class Confidences(dict[str, float]):
-    def __init__(self, probs: Dict[str, float]):
-        dict.__init__(self, probs)
-
-
-class TransparentConfidences(Confidences):
-    def __init__(
-        self,
-        probs: Dict[str, float],
-        explanation: Explanation,
-    ):
-        self.explanation = explanation
-        Confidences.__init__(self, probs)
-
-
-def convert_log(log: Log, names: List[str]) -> Explanation:
-    explanation: Explanation = {}
-    for word2, weight, word_probs in log:
-        if word2 in explanation:
-            explanation[word2]["count"] += 1
-        else:
-            explanation[word2] = {
-                "weight": weight,
-                "probabilities": {
-                    name: word_probs[index] for index, name in enumerate(names)
-                },
-                "count": 1,
-            }
-    return explanation
-
-
-class Model:
-    def __init__(
-        self,
-        weights: Dict[int, List[int]],
-        names: List[str],
-        max_ngram_length: int,
-        hash_algorithm: str,
-    ):
-        self.weights = weights
-        self.names = names
-        self.max_ngram_length = max_ngram_length
-        self.hash_algorithm = hash_algorithm
-
-    def confidence(
-        self, text: str, max_ngram_length: int, transparent: bool = False
-    ) -> Confidences:
-        """Classify text with confidence.
-
-        Parameters
-        ----------
-        text : str
-            The text to classify
-
-        max_ngram_length : int
-            The maximum ngram length to use in classifying
-
-        Returns
-        -------
-        dict
-            {category:probability, category:probability...} or {} if no words
-            matching any categories in the model were found
-
-        """
-
-        model = self.weights
-        max_ngram_length = min(self.max_ngram_length, max_ngram_length)
-
-        raw_tokens = gptc.tokenizer.tokenize(
-            text, min(max_ngram_length, self.max_ngram_length)
-        )
-
-        tokens = gptc.tokenizer.hash_list(
-            raw_tokens,
-            self.hash_algorithm,
-        )
-
-        if transparent:
-            token_map = {tokens[i]: raw_tokens[i] for i in range(len(tokens))}
-            log: Log = []
-
-        numbered_probs: Dict[int, float] = {}
-
-        for word in tokens:
-            try:
-                unweighted_numbers = [
-                    i / 65535 for i in cast(List[float], model[word])
-                ]
-
-                weight, weighted_numbers = gptc.weighting.weight(
-                    unweighted_numbers
-                )
-
-                if transparent:
-                    log.append(
-                        (
-                            token_map[word],
-                            weight,
-                            unweighted_numbers,
-                        )
-                    )
-
-                for category, value in enumerate(weighted_numbers):
-                    try:
-                        numbered_probs[category] += value
-                    except KeyError:
-                        numbered_probs[category] = value
-            except KeyError:
-                pass
-
-        total = sum(numbered_probs.values())
-        probs: Dict[str, float] = {
-            self.names[category]: value / total
-            for category, value in numbered_probs.items()
-        }
-
-        if transparent:
-            explanation = convert_log(log, self.names)
-            return TransparentConfidences(probs, explanation)
-
-        return Confidences(probs)
-
-    def get(self, token: str) -> Dict[str, float]:
-        try:
-            weights = self.weights[
-                gptc.tokenizer.hash_single(
-                    gptc.tokenizer.normalize(token), self.hash_algorithm
-                )
-            ]
-        except KeyError:
-            return {}
-        return {
-            category: weights[index] / 65535
-            for index, category in enumerate(self.names)
-        }
-
-    def serialize(self, file: BinaryIO) -> None:
-        file.write(b"GPTC model v6\n")
-        file.write(
-            json.dumps(
-                {
-                    "names": self.names,
-                    "max_ngram_length": self.max_ngram_length,
-                    "hash_algorithm": self.hash_algorithm,
-                }
-            ).encode("utf-8")
-            + b"\n"
-        )
-        for word, weights in self.weights.items():
-            file.write(
-                word.to_bytes(6, "big")
-                + b"".join([weight.to_bytes(2, "big") for weight in weights])
-            )
-
-    @staticmethod
-    def compile(
-        raw_model: Iterable[Mapping[str, str]],
-        max_ngram_length: int = 1,
-        min_count: int = 1,
-        hash_algorithm: str = "sha256",
-        ) -> 'Model':
-        """Compile a raw model.
-
-        Parameters
-        ----------
-        raw_model : list of dict
-            A raw GPTC model.
-
-        max_ngram_length : int
-            Maximum ngram lenght to compile with.
-
-        Returns
-        -------
-        dict
-            A compiled GPTC model.
-
-        """
-        word_counts, category_lengths, names = _count_words(
-            raw_model, max_ngram_length, hash_algorithm
-        )
-        model = _get_weights(min_count, word_counts, category_lengths, names)
-        return Model(model, names, max_ngram_length, hash_algorithm)
-
-    @staticmethod
-    def deserialize(encoded_model: BinaryIO) -> "Model":
-        prefix = encoded_model.read(14)
-        if prefix != b"GPTC model v6\n":
-            raise InvalidModelError()
-
-        config_json = b""
-        while True:
-            byte = encoded_model.read(1)
-            if byte == b"\n":
-                break
-
-            if byte == b"":
-                raise InvalidModelError()
-
-            config_json += byte
-
-        try:
-            config = json.loads(config_json.decode("utf-8"))
-        except (UnicodeDecodeError, json.JSONDecodeError) as exc:
-            raise InvalidModelError() from exc
-
-        try:
-            names = config["names"]
-            max_ngram_length = config["max_ngram_length"]
-            hash_algorithm = config["hash_algorithm"]
-        except KeyError as exc:
-            raise InvalidModelError() from exc
-
-        if not (
-            isinstance(names, list) and isinstance(max_ngram_length, int)
-        ) or not all(isinstance(name, str) for name in names):
-            raise InvalidModelError()
-
-        weight_code_length = 6 + 2 * len(names)
-
-        weights: Dict[int, List[int]] = {}
-
-        while True:
-            code = encoded_model.read(weight_code_length)
-            if not code:
-                break
-            if len(code) != weight_code_length:
-                raise InvalidModelError()
-
-            weights[int.from_bytes(code[:6], "big")] = [
-                int.from_bytes(value, "big")
-                for value in [code[x : x + 2] for x in range(6, len(code), 2)]
-            ]
-
-        return Model(weights, names, max_ngram_length, hash_algorithm)

gptc/pack.py

@@ -1,38 +0,0 @@
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-import sys
-import os
-from typing import List, Dict, Tuple
-
-
-def pack(
-    directory: str, print_exceptions: bool = False
-) -> Tuple[List[Dict[str, str]], List[Tuple[OSError]]]:
-    paths = os.listdir(directory)
-    texts: Dict[str, List[str]] = {}
-    exceptions = []
-
-    for path in paths:
-        texts[path] = []
-        try:
-            for file in os.listdir(os.path.join(directory, path)):
-                try:
-                    with open(
-                        os.path.join(directory, path, file), encoding="utf-8"
-                    ) as input_file:
-                        texts[path].append(input_file.read())
-                except OSError as error:
-                    exceptions.append((error,))
-                    if print_exceptions:
-                        print(error, file=sys.stderr)
-        except OSError as error:
-            exceptions.append((error,))
-            if print_exceptions:
-                print(error, file=sys.stderr)
-
-    raw_model = []
-
-    for category, cat_texts in texts.items():
-        raw_model += [{"category": category, "text": i} for i in cat_texts]
-
-    return raw_model, exceptions

gptc/tokenizer.py

@@ -1,35 +1,13 @@
-# SPDX-License-Identifier: GPL-3.0-or-later
+# SPDX-License-Identifier: LGPL-3.0-or-later
-
-import unicodedata
-from typing import List, cast
-import hashlib
-import emoji
 
 
-def tokenize(text: str, max_ngram_length: int = 1) -> List[str]:
+def tokenize(text, max_ngram_length=1):
-    text = unicodedata.normalize("NFKD", text).casefold()
+    """Convert a string to a list of lemmas."""
-    parts = []
-    highest_end = 0
-    for emoji_part in emoji.emoji_list(text):
-        parts += list(text[highest_end : emoji_part["match_start"]])
-        parts.append(emoji_part["emoji"])
-        highest_end = emoji_part["match_end"]
-    parts += list(text[highest_end:])
-    converted_text = [part for part in parts if part]
-
     tokens = [""]
 
-    for char in converted_text:
+    for char in text.lower():
-        if (
+        if char.isalpha() or char == "'":
-            char.isalpha()
-            or char.isnumeric()
-            or char == "'"
-            or (char in ",." and (" " + tokens[-1])[-1].isnumeric())
-        ):
             tokens[-1] += char
-        elif emoji.is_emoji(char):
-            tokens.append(char)
-            tokens.append("")
         elif tokens[-1] != "":
             tokens.append("")
 
@@ -37,50 +15,9 @@ def tokenize(text: str, max_ngram_length: int = 1) -> List[str]:
 
     if max_ngram_length == 1:
         return tokens
-
+    else:
-    ngrams = []
+        ngrams = []
-    for ngram_length in range(1, max_ngram_length + 1):
+        for ngram_length in range(1, max_ngram_length + 1):
-        for index in range(len(tokens) + 1 - ngram_length):
+            for index in range(len(tokens) + 1 - ngram_length):
-            ngrams.append(" ".join(tokens[index : index + ngram_length]))
+                ngrams.append(" ".join(tokens[index : index + ngram_length]))
-    return ngrams
+        return ngrams
-
-
-def _hash_single(token: str, hash_function: type) -> int:
-    return int.from_bytes(
-        hash_function(token.encode("utf-8")).digest()[:6], "big"
-    )
-
-
-def _get_hash_function(hash_algorithm: str) -> type:
-    if hash_algorithm in {
-        "sha224",
-        "md5",
-        "sha512",
-        "sha3_256",
-        "blake2s",
-        "sha3_224",
-        "sha1",
-        "sha256",
-        "sha384",
-        "shake_256",
-        "blake2b",
-        "sha3_512",
-        "shake_128",
-        "sha3_384",
-    }:
-        return cast(type, getattr(hashlib, hash_algorithm))
-
-    raise ValueError("not a valid hash function: " + hash_algorithm)
-
-
-def hash_single(token: str, hash_algorithm: str) -> int:
-    return _hash_single(token, _get_hash_function(hash_algorithm))
-
-
-def hash_list(tokens: List[str], hash_algorithm: str) -> List[int]:
-    hash_function = _get_hash_function(hash_algorithm)
-    return [_hash_single(token, hash_function) for token in tokens]
-
-
-def normalize(text: str) -> str:
-    return " ".join(tokenize(text, 1))

gptc/weighting.py

@@ -1,10 +1,9 @@
-# SPDX-License-Identifier: GPL-3.0-or-later
+# SPDX-License-Identifier: LGPL-3.0-or-later
 
 import math
-from typing import Sequence, Tuple, List
 
 
-def _mean(numbers: Sequence[float]) -> float:
+def _mean(numbers):
     """Calculate the mean of a group of numbers
 
     Parameters
@@ -20,7 +19,7 @@ def _mean(numbers: Sequence[float]) -> float:
     return sum(numbers) / len(numbers)
 
 
-def _standard_deviation(numbers: Sequence[float]) -> float:
+def _standard_deviation(numbers):
     """Calculate the standard deviation of a group of numbers
 
     Parameters
@@ -39,8 +38,8 @@ def _standard_deviation(numbers: Sequence[float]) -> float:
     return math.sqrt(_mean(squared_deviations))
 
 
-def weight(numbers: Sequence[float]) -> Tuple[float, List[float]]:
+def weight(numbers):
     standard_deviation = _standard_deviation(numbers)
-    weight_assigned = standard_deviation * 2
+    weight = standard_deviation * 2
-    weighted_numbers = [i * weight_assigned for i in numbers]
+    weighted_numbers = [i * weight for i in numbers]
-    return weight_assigned, weighted_numbers
+    return weight, weighted_numbers

profiler.py

@@ -1,16 +0,0 @@
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-import cProfile
-import gptc
-import json
-import sys
-
-max_ngram_length = 10
-
-with open("models/raw.json") as f:
-    raw_model = json.load(f)
-
-with open("models/benchmark_text.txt") as f:
-    text = f.read()
-
-cProfile.run("gptc.Model.compile(raw_model, max_ngram_length)")

pyproject.toml

@@ -4,18 +4,19 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "gptc"
-version = "4.0.1"
+version = "2.0.0"
 description = "General-purpose text classifier"
 readme = "README.md"
 authors = [{ name = "Samuel Sloniker", email = "sam@kj7rrv.com"}]
+license = { file = "LICENSE" }
 classifiers = [
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
     "Development Status :: 5 - Production/Stable",
-    "License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)",
+    "License :: OSI Approved :: GNU Lesser General Public License v3 or later (LGPLv3+)",
     "Operating System :: OS Independent",
 ]
-dependencies = ["emoji"]
+dependencies = []
 requires-python = ">=3.7"
 
 [project.urls]

utils/pack.py

@@ -0,0 +1,41 @@
+# SPDX-License-Identifier: LGPL-3.0-or-later
+
+import sys
+import os
+import json
+
+
+def pack(directory, print_exceptions=True):
+    paths = os.listdir(directory)
+    texts = {}
+    exceptions = []
+
+    for path in paths:
+        texts[path] = []
+        try:
+            for file in os.listdir(os.path.join(sys.argv[1], path)):
+                try:
+                    with open(os.path.join(sys.argv[1], path, file)) as f:
+                        texts[path].append(f.read())
+                except Exception as e:
+                    exceptions.append((e,))
+                    if print_exceptions:
+                        print(e, file=sys.stderr)
+        except Exception as e:
+            exceptions.append((e,))
+            if print_exceptions:
+                print(e, file=sys.stderr)
+
+    raw_model = []
+
+    for category, cat_texts in texts.items():
+        raw_model += [{"category": category, "text": i} for i in cat_texts]
+
+    return raw_model, exceptions
+
+
+if len(sys.argv) != 2:
+    print("usage: pack.py <path>", file=sys.stderr)
+    exit(1)
+
+print(json.dumps(pack(sys.argv[1])[0]))