Replace TNC with Phupha word frequency dataset filtered by ORST words

pythainlp/corpus/phupha.py

@@ -0,0 +1,89 @@
+# SPDX-FileCopyrightText: 2016-2026 PyThaiNLP Project
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: Apache-2.0
+"""Phupha: Thai Word Frequency Dataset
+
+Phupha is a Thai Word Frequency Dataset from Common Crawl Corpus.
+
+Dataset:
+    Phatthiyaphaibun, W. (2026). Phupha: Thai Word Frequency Dataset
+    [Data set]. Zenodo. https://doi.org/10.5281/zenodo.18490474
+
+License:
+    Creative Commons Zero 1.0 Universal Public Domain Dedication License (CC0)
+"""
+
+from __future__ import annotations
+
+__all__: list[str] = [
+    "word_freqs",
+    "unigram_word_freqs",
+]
+
+from collections import defaultdict
+
+from pythainlp.corpus import get_corpus
+
+_UNIGRAM_FILENAME: str = "phupha_word_freqs.txt"
+
+
+def word_freqs() -> list[tuple[str, int]]:
+    """Get word frequency from Phupha dataset
+
+    Phupha is a Thai Word Frequency Dataset from Common Crawl Corpus.
+
+    :return: List of tuples (word, frequency)
+    :rtype: list[tuple[str, int]]
+
+    :Example:
+    ::
+
+        from pythainlp.corpus import phupha
+
+        freqs = phupha.word_freqs()
+        print(freqs[:5])
+        # output: [('น', 1119315948), ('ร', 1066483406), ...]
+
+    **Dataset Citation:**
+
+    Phatthiyaphaibun, W. (2026). *Phupha: Thai Word Frequency Dataset*
+    [Data set]. Zenodo. https://doi.org/10.5281/zenodo.18490474
+    """
+    freqs: list[tuple[str, int]] = []
+    for line in get_corpus(_UNIGRAM_FILENAME):
+        word_freq = line.split("\t")
+        if len(word_freq) >= 2:
+            freqs.append((word_freq[0], int(word_freq[1])))
+
+    return freqs
+
+
+def unigram_word_freqs() -> dict[str, int]:
+    """Get unigram word frequency from Phupha dataset
+
+    Phupha is a Thai Word Frequency Dataset from Common Crawl Corpus.
+
+    :return: Dictionary mapping words to their frequencies
+    :rtype: dict[str, int]
+
+    :Example:
+    ::
+
+        from pythainlp.corpus import phupha
+
+        freqs = phupha.unigram_word_freqs()
+        print(freqs.get('ไทย', 0))
+        # output: frequency count for 'ไทย'
+
+    **Dataset Citation:**
+
+    Phatthiyaphaibun, W. (2026). *Phupha: Thai Word Frequency Dataset*
+    [Data set]. Zenodo. https://doi.org/10.5281/zenodo.18490474
+    """
+    freqs: dict[str, int] = defaultdict(int)
+    for line in get_corpus(_UNIGRAM_FILENAME):
+        _temp = line.strip().split("\t")
+        if len(_temp) >= 2:
+            freqs[_temp[0]] = int(_temp[-1])
+
+    return freqs