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Issue #11089: Fix performance issue limiting the use of ConfigParser()

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with large config files.
This commit is contained in:
Raymond Hettinger 2011-02-21 19:38:53 +00:00
parent bf709fe08c
commit e66036063b
3 changed files with 103 additions and 8 deletions
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17
Lib/configparser.py
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@ -119,7 +119,7 @@ ConfigParser -- responsible for parsing a list of
between keys and values are surrounded by spaces.
"""
from collections import MutableMapping, OrderedDict as _default_dict
from collections import MutableMapping, OrderedDict as _default_dict, _ChainMap
import functools
import io
import itertools
@ -1099,23 +1099,24 @@ class RawConfigParser(MutableMapping):
return exc
def _unify_values(self, section, vars):
"""Create a copy of the DEFAULTSECT with values from a specific
`section' and the `vars' dictionary. If provided, values in `vars'
take precendence.
"""Create a sequence of lookups with 'vars' taking priority over
the 'section' which takes priority over the DEFAULTSECT.
"""
d = self._defaults.copy()
sectiondict = {}
try:
d.update(self._sections[section])
sectiondict = self._sections[section]
except KeyError:
if section != self.default_section:
raise NoSectionError(section)
# Update with the entry specific variables
vardict = {}
if vars:
for key, value in vars.items():
if value is not None:
value = str(value)
d[self.optionxform(key)] = value
return d
vardict[self.optionxform(key)] = value
return _ChainMap(vardict, sectiondict, self._defaults)
def _convert_to_boolean(self, value):
"""Return a boolean value translating from other types if necessary.