def load_grammar(version=None):
"""
Loads a Python grammar. The default version is always the latest.
If you need support for a specific version, please use e.g.
`version='3.3'`.
"""
if version is None:
version = '3.6'
if version in ('3.2', '3.3'):
version = '3.4'
elif version == '2.6':
version = '2.7'
file = 'grammar' + version + '.txt'
global _loaded_grammars
path = os.path.join(os.path.dirname(__file__), file)
try:
return _loaded_grammars[path]
except KeyError:
try:
with open(path) as f:
bnf_text = f.read()
grammar = generate_grammar(bnf_text)
return _loaded_grammars.setdefault(path, grammar)
except FileNotFoundError:
# Just load the default if the file does not exist.
return load_grammar()
def load_grammar(version=None):
"""
Loads a Python grammar. The default version is always the latest.
If you need support for a specific version, please use e.g.
`version='3.3'`.
"""
if version is None:
version = '3.6'
if version in ('3.2', '3.3'):
version = '3.4'
elif version == '2.6':
version = '2.7'
file = 'grammar' + version + '.txt'
global _loaded_grammars
path = os.path.join(os.path.dirname(__file__), file)
try:
return _loaded_grammars[path]
except KeyError:
try:
with open(path) as f:
bnf_text = f.read()
grammar = generate_grammar(bnf_text)
return _loaded_grammars.setdefault(path, grammar)
except FileNotFoundError:
# Just load the default if the file does not exist.
return load_grammar()
def load_grammar(file='grammar3.4'):
# For now we only support two different Python syntax versions: The latest
# Python 3 and Python 2. This may change.
if file.startswith('grammar3'):
file = 'grammar3.4'
else:
file = 'grammar2.7'
global _loaded_grammars
path = os.path.join(os.path.dirname(__file__), file) + '.txt'
try:
return _loaded_grammars[path]
except KeyError:
return _loaded_grammars.setdefault(path, generate_grammar(path))
def load_grammar(file='grammar3.4'):
# For now we only support two different Python syntax versions: The latest
# Python 3 and Python 2. This may change.
if file.startswith('grammar3'):
file = 'grammar3.4'
else:
file = 'grammar2.7'
global _loaded_grammars
path = os.path.join(os.path.dirname(__file__), file) + '.txt'
try:
return _loaded_grammars[path]
except KeyError:
return _loaded_grammars.setdefault(path, generate_grammar(path))
def load_grammar(version='3.4'):
# For now we only support two different Python syntax versions: The latest
# Python 3 and Python 2. This may change.
if version in ('3.2', '3.3'):
version = '3.4'
elif version == '2.6':
version = '2.7'
file = 'grammar' + version + '.txt'
global _loaded_grammars
path = os.path.join(os.path.dirname(__file__), file)
try:
return _loaded_grammars[path]
except KeyError:
return _loaded_grammars.setdefault(path, generate_grammar(path))
def load_grammar(version='3.4'):
# For now we only support two different Python syntax versions: The latest
# Python 3 and Python 2. This may change.
if version in ('3.2', '3.3'):
version = '3.4'
elif version == '2.6':
version = '2.7'
file = 'grammar' + version + '.txt'
global _loaded_grammars
path = os.path.join(os.path.dirname(__file__), file)
try:
return _loaded_grammars[path]
except KeyError:
return _loaded_grammars.setdefault(path, generate_grammar(path))