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Make version a keyword only argument in load_grammar.

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This commit is contained in:
Dave Halter
2017-07-14 18:28:03 +02:00
parent 1d0e982d89
commit f6b3b1cc24
3 changed files with 28 additions and 26 deletions
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44
parso/grammar.py
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@@ -144,35 +144,37 @@ class PythonGrammar(Grammar):
return tokenize(code, self._version_int)
def load_grammar(version=None):
def load_grammar(**kwargs):
"""
Loads a Python grammar. The default version is the current Python version.
If you need support for a specific version, please use e.g.
`version='3.3'`.
"""
version_int = version_string_to_int(version)
def load_grammar(version=None):
version_int = version_string_to_int(version)
# For these versions we use the same grammar files, because nothing
# changed.
if version_int == 33:
version_int = 34
elif version_int == 26:
version_int = 27
# For these versions we use the same grammar files, because nothing
# changed.
if version_int == 33:
version_int = 34
elif version_int == 26:
version_int = 27
file = 'python/grammar' + str(version_int) + '.txt'
file = 'python/grammar' + str(version_int) + '.txt'
global _loaded_grammars
path = os.path.join(os.path.dirname(__file__), file)
try:
return _loaded_grammars[path]
except KeyError:
global _loaded_grammars
path = os.path.join(os.path.dirname(__file__), file)
try:
with open(path) as f:
bnf_text = f.read()
return _loaded_grammars[path]
except KeyError:
try:
with open(path) as f:
bnf_text = f.read()
grammar = PythonGrammar(version_int, bnf_text)
return _loaded_grammars.setdefault(path, grammar)
except FileNotFoundError:
message = "Python version %s is currently not supported." % version
raise NotImplementedError(message)
grammar = PythonGrammar(version_int, bnf_text)
return _loaded_grammars.setdefault(path, grammar)
except FileNotFoundError:
message = "Python version %s is currently not supported." % version
raise NotImplementedError(message)
return load_grammar(**kwargs)