Problema StopIteration about pattern HOT 5 OPEN

import os.path

import pattern.text

from pattern.helpers import decode_string
from codecs import BOM_UTF8

BOM_UTF8 = BOM_UTF8.decode("utf-8")
decode_utf8 = decode_string


def _read(path, encoding="utf-8", comment=";;;"):
    """Returns an iterator over the lines in the file at the given path,
    strippping comments and decoding each line to Unicode.
    """
    if path:
        if isinstance(path, str) and os.path.exists(path):
            # From file path.
            f = open(path, "r", encoding="utf-8")
        elif isinstance(path, str):
            # From string.
            f = path.splitlines()
        else:
            # From file or buffer.
            f = path
        for i, line in enumerate(f):
            line = line.strip(BOM_UTF8) if i == 0 and isinstance(line, str) else line
            line = line.strip()
            line = decode_utf8(line, encoding)
            if not line or (comment and line.startswith(comment)):
                continue
            yield line


pattern.text._read = _read

>>> from pattern.en import parse
>>> parse('This is a test.')
Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/pattern/text/__init__.py", line 609, in _read
    raise StopIteration
StopIteration

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.8/site-packages/pattern/text/en/__init__.py", line 169, in parse
    return parser.parse(s, *args, **kwargs)
  File "/usr/local/lib/python3.8/site-packages/pattern/text/__init__.py", line 1172, in parse
    s[i] = self.find_tags(s[i], **kwargs)
  File "/usr/local/lib/python3.8/site-packages/pattern/text/en/__init__.py", line 114, in find_tags
    return _Parser.find_tags(self, tokens, **kwargs)
  File "/usr/local/lib/python3.8/site-packages/pattern/text/__init__.py", line 1113, in find_tags
    lexicon = kwargs.get("lexicon", self.lexicon or {}),
  File "/usr/local/lib/python3.8/site-packages/pattern/text/__init__.py", line 376, in __len__
    return self._lazy("__len__")
  File "/usr/local/lib/python3.8/site-packages/pattern/text/__init__.py", line 368, in _lazy
    self.load()
  File "/usr/local/lib/python3.8/site-packages/pattern/text/__init__.py", line 625, in load
    dict.update(self, (x.split(" ")[:2] for x in _read(self._path) if len(x.split(" ")) > 1))
  File "/usr/local/lib/python3.8/site-packages/pattern/text/__init__.py", line 625, in <genexpr>
    dict.update(self, (x.split(" ")[:2] for x in _read(self._path) if len(x.split(" ")) > 1))
RuntimeError: generator raised StopIteration
>>> parse('This is a test.')
Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/pattern/text/__init__.py", line 609, in _read
    raise StopIteration
StopIteration

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.8/site-packages/pattern/text/en/__init__.py", line 169, in parse
    return parser.parse(s, *args, **kwargs)
  File "/usr/local/lib/python3.8/site-packages/pattern/text/__init__.py", line 1172, in parse
    s[i] = self.find_tags(s[i], **kwargs)
  File "/usr/local/lib/python3.8/site-packages/pattern/text/en/__init__.py", line 114, in find_tags
    return _Parser.find_tags(self, tokens, **kwargs)
  File "/usr/local/lib/python3.8/site-packages/pattern/text/__init__.py", line 1112, in find_tags
    return find_tags(tokens,
  File "/usr/local/lib/python3.8/site-packages/pattern/text/__init__.py", line 1540, in find_tags
    tagged = entities.apply(tagged)
  File "/usr/local/lib/python3.8/site-packages/pattern/text/__init__.py", line 976, in apply
    if w in self:
  File "/usr/local/lib/python3.8/site-packages/pattern/text/__init__.py", line 382, in __contains__
    return self._lazy("__contains__", *args)
  File "/usr/local/lib/python3.8/site-packages/pattern/text/__init__.py", line 368, in _lazy
    self.load()
  File "/usr/local/lib/python3.8/site-packages/pattern/text/__init__.py", line 959, in load
    for x in _read(self.path):
RuntimeError: generator raised StopIteration
>>> parse('This is a test.')
'This/DT/O/O is/VBZ/B-VP/O a/DT/B-NP/O test/NN/I-NP/O ././O/O'