Error on importing: "re.PatternError: global flags not at the start of the expression at position 24" #274

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2026-02-15T16:29:27-05:00

yindo commented

2026-02-15 16:29:27 -05:00

Originally created by @asweigart on GitHub (Jun 7, 2025).

I'm running ollama 0.9.0 and ollama-python 0.5.1 on Python 3.13.3 on macOS Sequoia 15.5. I get this error when I try to import the module:

>>> from ollama import chat
Traceback (most recent call last):
  File "<python-input-0>", line 1, in <module>
    from ollama import chat
  File "/Users/al/Scripts/.venv/lib/python3.13/site-packages/ollama/__init__.py", line 1, in <module>
    from ollama._client import AsyncClient, Client
  File "/Users/al/Scripts/.venv/lib/python3.13/site-packages/ollama/_client.py", line 42, in <module>
    import httpx
  File "/Users/al/Scripts/.venv/lib/python3.13/site-packages/httpx/__init__.py", line 15, in <module>
    from ._main import main
  File "/Users/al/Scripts/.venv/lib/python3.13/site-packages/httpx/_main.py", line 9, in <module>
    import pygments.lexers
  File "/Users/al/Scripts/.venv/lib/python3.13/site-packages/pygments/__init__.py", line 37, in <module>
    from pygments.util import StringIO, BytesIO
  File "/Users/al/Scripts/.venv/lib/python3.13/site-packages/pygments/util.py", line 27, in <module>
    tag_re = re.compile(r'<(.+?)(\s.*?)?>.*?</.+?>(?uism)')
  File "/opt/homebrew/Cellar/python@3.13/3.13.3/Frameworks/Python.framework/Versions/3.13/lib/python3.13/re/__init__.py", line 289, in compile
    return _compile(pattern, flags)
  File "/opt/homebrew/Cellar/python@3.13/3.13.3/Frameworks/Python.framework/Versions/3.13/lib/python3.13/re/__init__.py", line 350, in _compile
    p = _compiler.compile(pattern, flags)
  File "/opt/homebrew/Cellar/python@3.13/3.13.3/Frameworks/Python.framework/Versions/3.13/lib/python3.13/re/_compiler.py", line 748, in compile
    p = _parser.parse(p, flags)
  File "/opt/homebrew/Cellar/python@3.13/3.13.3/Frameworks/Python.framework/Versions/3.13/lib/python3.13/re/_parser.py", line 980, in parse
    p = _parse_sub(source, state, flags & SRE_FLAG_VERBOSE, 0)
  File "/opt/homebrew/Cellar/python@3.13/3.13.3/Frameworks/Python.framework/Versions/3.13/lib/python3.13/re/_parser.py", line 459, in _parse_sub
    itemsappend(_parse(source, state, verbose, nested + 1,
                ~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                       not nested and not items))
                       ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/python@3.13/3.13.3/Frameworks/Python.framework/Versions/3.13/lib/python3.13/re/_parser.py", line 841, in _parse
    raise source.error('global flags not at the start '
                       'of the expression',
                       source.tell() - start)
re.PatternError: global flags not at the start of the expression at position 24

Originally created by @asweigart on GitHub (Jun 7, 2025). I'm running ollama 0.9.0 and ollama-python 0.5.1 on Python 3.13.3 on macOS Sequoia 15.5. I get this error when I try to import the module: ``` >>> from ollama import chat Traceback (most recent call last): File "<python-input-0>", line 1, in <module> from ollama import chat File "/Users/al/Scripts/.venv/lib/python3.13/site-packages/ollama/__init__.py", line 1, in <module> from ollama._client import AsyncClient, Client File "/Users/al/Scripts/.venv/lib/python3.13/site-packages/ollama/_client.py", line 42, in <module> import httpx File "/Users/al/Scripts/.venv/lib/python3.13/site-packages/httpx/__init__.py", line 15, in <module> from ._main import main File "/Users/al/Scripts/.venv/lib/python3.13/site-packages/httpx/_main.py", line 9, in <module> import pygments.lexers File "/Users/al/Scripts/.venv/lib/python3.13/site-packages/pygments/__init__.py", line 37, in <module> from pygments.util import StringIO, BytesIO File "/Users/al/Scripts/.venv/lib/python3.13/site-packages/pygments/util.py", line 27, in <module> tag_re = re.compile(r'<(.+?)(\s.*?)?>.*?</.+?>(?uism)') File "/opt/homebrew/Cellar/python@3.13/3.13.3/Frameworks/Python.framework/Versions/3.13/lib/python3.13/re/__init__.py", line 289, in compile return _compile(pattern, flags) File "/opt/homebrew/Cellar/python@3.13/3.13.3/Frameworks/Python.framework/Versions/3.13/lib/python3.13/re/__init__.py", line 350, in _compile p = _compiler.compile(pattern, flags) File "/opt/homebrew/Cellar/python@3.13/3.13.3/Frameworks/Python.framework/Versions/3.13/lib/python3.13/re/_compiler.py", line 748, in compile p = _parser.parse(p, flags) File "/opt/homebrew/Cellar/python@3.13/3.13.3/Frameworks/Python.framework/Versions/3.13/lib/python3.13/re/_parser.py", line 980, in parse p = _parse_sub(source, state, flags & SRE_FLAG_VERBOSE, 0) File "/opt/homebrew/Cellar/python@3.13/3.13.3/Frameworks/Python.framework/Versions/3.13/lib/python3.13/re/_parser.py", line 459, in _parse_sub itemsappend(_parse(source, state, verbose, nested + 1, ~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not nested and not items)) ^^^^^^^^^^^^^^^^^^^^^^^^^ File "/opt/homebrew/Cellar/python@3.13/3.13.3/Frameworks/Python.framework/Versions/3.13/lib/python3.13/re/_parser.py", line 841, in _parse raise source.error('global flags not at the start ' 'of the expression', source.tell() - start) re.PatternError: global flags not at the start of the expression at position 24 ```

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Reference: ollama/ollama-python#274