[MNT]: UserWarning from pyparsing upon immediate import #24972

Activity

1. greglucas

   added

   Maintenance

   on Jan 13, 2023
2. tacaswell

   added

   status: confirmed bug

   on Jan 13, 2023
3. tacaswell

   added this to the v3.7.0 milestone on Jan 13, 2023
4. anntzer commented on Jan 14, 2023

   

   anntzer

   on Jan 14, 2023

   Contributor

   More actions

   Looks like this just needs what the warning says:

   diff --git i/lib/matplotlib/_fontconfig_pattern.py w/lib/matplotlib/_fontconfig_pattern.py
   index efc1c9304f..f0ed155c2d 100644
   --- i/lib/matplotlib/_fontconfig_pattern.py
   +++ w/lib/matplotlib/_fontconfig_pattern.py
   @@ -13,7 +13,7 @@ from functools import lru_cache, partial
    import re
    
    from pyparsing import (
   -    Optional, ParseException, Regex, StringEnd, Suppress, ZeroOrMore)
   +    Group, Optional, ParseException, Regex, StringEnd, Suppress, ZeroOrMore)
    
    from matplotlib import _api
    
   @@ -64,7 +64,7 @@ def _make_fontconfig_parser():
        name = Regex(r"[a-z]+")
        value = Regex(r"([^%s]|(\\[%s]))*" % (_value_punc, _value_punc))
        # replace trailing `| name` by oneOf(_CONSTANTS) in mpl 3.9.
   -    prop = (name + Suppress("=") + comma_separated(value)) | name
   +    prop = Group((name + Suppress("=") + comma_separated(value)) | name)
        return (
            Optional(comma_separated(family)("families"))
            + Optional("-" + comma_separated(size)("sizes"))
5. greglucas

   added

   status: has patchpatch suggested, PR still neededpatch suggested, PR still needed

   on Jan 14, 2023
6. ksunden

   closed this as completedin #24989on Jan 17, 2023