本文整理汇总了Python中lib2to3.pytree.Base方法的典型用法代码示例。如果您正苦于以下问题：Python pytree.Base方法的具体用法？Python pytree.Base怎么用？Python pytree.Base使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类lib2to3.pytree的用法示例。
在下文中一共展示了pytree.Base方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: test_instantiate_base
# 需要导入模块: from lib2to3 import pytree [as 别名]
# 或者: from lib2to3.pytree import Base [as 别名]
def test_instantiate_base(self):
if __debug__:
# Test that instantiating Base() raises an AssertionError
self.assertRaises(AssertionError, pytree.Base) 示例2: count_args
# 需要导入模块: from lib2to3 import pytree [as 别名]
# 或者: from lib2to3.pytree import Base [as 别名]
def count_args(node, results):
# type: (Node, Dict[str, Base]) -> Tuple[int, bool, bool, bool]
"""Count arguments and check for self and *args, **kwds.
Return (selfish, count, star, starstar) where:
- count is total number of args (including *args, **kwds)
- selfish is True if the initial arg is named 'self' or 'cls'
- star is True iff *args is found
- starstar is True iff **kwds is found
"""
count = 0
selfish = False
star = False
starstar = False
args = results.get('args')
if isinstance(args, Node):
children = args.children
elif isinstance(args, Leaf):
children = [args]
else:
children = []
# Interpret children according to the following grammar:
# (('*'|'**')? NAME ['=' expr] ','?)*
skip = False
previous_token_is_star = False
for child in children:
if skip:
skip = False
elif isinstance(child, Leaf):
# A single '*' indicates the rest of the arguments are keyword only
# and shouldn't be counted as a `*`.
if child.type == token.STAR:
previous_token_is_star = True
elif child.type == token.DOUBLESTAR:
starstar = True
elif child.type == token.NAME:
if count == 0:
if child.value in ('self', 'cls'):
selfish = True
count += 1
if previous_token_is_star:
star = True
elif child.type == token.EQUAL:
skip = True
if child.type != token.STAR:
previous_token_is_star = False
return count, selfish, star, starstar