mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-08-04 00:48:58 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 8

bpo-37950: Fix ast.dump() when call with incompletely initialized node. (GH-15510)

Browse source
This commit is contained in:
Serhiy Storchaka 2019-08-29 09:30:23 +03:00 • committed by GitHub
parent b235a1b473
commit e64f948e76
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
4 changed files with 59 additions and 19 deletions
Download patch file Download diff file Expand all files Collapse all files

39
Lib/ast.py
View file

@ -98,26 +98,35 @@ def literal_eval(node_or_string):
def dump(node, annotate_fields=True, include_attributes=False):
"""
Return a formatted dump of the tree in *node*. This is mainly useful for
debugging purposes. The returned string will show the names and the values
for fields. This makes the code impossible to evaluate, so if evaluation is
wanted *annotate_fields* must be set to False. Attributes such as line
Return a formatted dump of the tree in node. This is mainly useful for
debugging purposes. If annotate_fields is true (by default),
the returned string will show the names and the values for fields.
If annotate_fields is false, the result string will be more compact by
omitting unambiguous field names. Attributes such as line
numbers and column offsets are not dumped by default. If this is wanted,
*include_attributes* can be set to True.
include_attributes can be set to true.
"""
def _format(node):
if isinstance(node, AST):
fields = [(a, _format(b)) for a, b in iter_fields(node)]
rv = '%s(%s' % (node.__class__.__name__, ', '.join(
('%s=%s' % field for field in fields)
if annotate_fields else
(b for a, b in fields)
))
args = []
keywords = annotate_fields
for field in node._fields:
try:
value = getattr(node, field)
except AttributeError:
keywords = True
else:
if keywords:
args.append('%s=%s' % (field, _format(value)))
else:
args.append(_format(value))
if include_attributes and node._attributes:
rv += fields and ', ' or ' '
rv += ', '.join('%s=%s' % (a, _format(getattr(node, a)))
for a in node._attributes)
return rv + ')'
for a in node._attributes:
try:
args.append('%s=%s' % (a, _format(getattr(node, a))))
except AttributeError:
pass
return '%s(%s)' % (node.__class__.__name__, ', '.join(args))
elif isinstance(node, list):
return '[%s]' % ', '.join(_format(x) for x in node)
return repr(node)