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Better documentation for the parso grammar.

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Dave Halter
2017-05-23 14:10:32 -04:00
parent 5fab429163
commit 649d2bebbc
1 changed files with 19 additions and 10 deletions
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29
parso/grammar.py
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@@ -23,17 +23,24 @@ class Grammar(object):
If you need finer grained control over the parsed instance, there will be
other ways to access it.
:param code: A unicode string that contains Python code.
:param path: The path to the file you want to open. Only needed for caching.
:param grammar: A Python grammar file, created with load_grammar. You may
not specify it. In that case it's the current Python version.
:param error_recovery: If enabled, any code will be returned. If it is
invalid, it will be returned as an error node. If disabled, you will
get a ParseError when encountering syntax errors in your code.
:param start_symbol: The grammar symbol that you want to parse. Only
:param code str: A unicode string that contains Python code.
:param path str: The path to the file you want to open. Only needed for caching.
:param error_recovery bool: If enabled, any code will be returned. If
it is invalid, it will be returned as an error node. If disabled,
you will get a ParseError when encountering syntax errors in your
code.
:param start_symbol str: The grammar symbol that you want to parse. Only
allowed to be used when error_recovery is disabled.
:param cache_path: If given saves the parso cache in this directory. If not
given, defaults to the default cache places on each platform.
:param cache bool: A Python grammar file, created with load_grammar.
You may not specify it. In that case it's the current Python version.
:param diff_cache bool: Diffs the cached python module against the new
code and tries to parse only the parts that have changed. Returns
the same (changed) module that is found in cache. Using this option
requires you to not do anything anymore with the old cached module,
because the contents of it might have changed.
:param cache_path bool: If given saves the parso cache in this
directory. If not given, defaults to the default cache places on
each platform.
:return: A syntax tree node. Typically the module.
"""
@@ -48,6 +55,8 @@ class Grammar(object):
"""
if code is None and path is None:
raise TypeError("Please provide either code or a path.")
if error_recovery and start_symbol:
raise NotImplementedError("This is currently not implemented.")
if cache and code is None and path is not None:
# With the current architecture we cannot load from cache if the