本文整理汇总了Python中lib2to3.fixer_util.is_tuple方法的典型用法代码示例。如果您正苦于以下问题：Python fixer_util.is_tuple方法的具体用法？Python fixer_util.is_tuple怎么用？Python fixer_util.is_tuple使用的例子？那么, 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.fixer_util的用法示例。
在下文中一共展示了fixer_util.is_tuple方法的4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: is_tuple
# 需要导入模块: from lib2to3 import fixer_util [as 别名]
# 或者: from lib2to3.fixer_util import is_tuple [as 别名]
def is_tuple(self, string):
return fixer_util.is_tuple(parse(string, strip_levels=2)) 示例2: test_valid
# 需要导入模块: from lib2to3 import fixer_util [as 别名]
# 或者: from lib2to3.fixer_util import is_tuple [as 别名]
def test_valid(self):
self.assertTrue(self.is_tuple("(a, b)"))
self.assertTrue(self.is_tuple("(a, (b, c))"))
self.assertTrue(self.is_tuple("((a, (b, c)),)"))
self.assertTrue(self.is_tuple("(a,)"))
self.assertTrue(self.is_tuple("()")) 示例3: test_invalid
# 需要导入模块: from lib2to3 import fixer_util [as 别名]
# 或者: from lib2to3.fixer_util import is_tuple [as 别名]
def test_invalid(self):
self.assertFalse(self.is_tuple("(a)"))
self.assertFalse(self.is_tuple("('foo') % (b, c)")) 示例4: transform
# 需要导入模块: from lib2to3 import fixer_util [as 别名]
# 或者: from lib2to3.fixer_util import is_tuple [as 别名]
def transform(self, node, results):
syms = self.syms
exc = results["exc"].clone()
if exc.type == token.STRING:
msg = "Python 3 does not support string exceptions"
self.cannot_convert(node, msg)
return
# Python 2 supports
# raise ((((E1, E2), E3), E4), E5), V
# as a synonym for
# raise E1, V
# Since Python 3 will not support this, we recurse down any tuple
# literals, always taking the first element.
if is_tuple(exc):
while is_tuple(exc):
# exc.children[1:-1] is the unparenthesized tuple
# exc.children[1].children[0] is the first element of the tuple
exc = exc.children[1].children[0].clone()
exc.prefix = u" "
if "val" not in results:
# One-argument raise
new = pytree.Node(syms.raise_stmt, [Name(u"raise"), exc])
new.prefix = node.prefix
return new
val = results["val"].clone()
if is_tuple(val):
args = [c.clone() for c in val.children[1:-1]]
else:
val.prefix = u""
args = [val]
return pytree.Node(syms.raise_stmt,
[Name(u"raise"), Call(exc, args)],
prefix=node.prefix)