本文整理汇总了Python中lib2to3.fixer_util.token.DOUBLESTAR属性的典型用法代码示例。如果您正苦于以下问题:Python token.DOUBLESTAR属性的具体用法?Python token.DOUBLESTAR怎么用?Python token.DOUBLESTAR使用的例子?那么, 这里精选的属性代码示例或许可以为您提供帮助。您也可以进一步了解该属性所在类lib2to3.fixer_util.token
的用法示例。
在下文中一共展示了token.DOUBLESTAR属性的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: gen_params
# 需要导入模块: from lib2to3.fixer_util import token [as 别名]
# 或者: from lib2to3.fixer_util.token import DOUBLESTAR [as 别名]
def gen_params(raw_params):
u"""
Generator that yields tuples of (name, default_value) for each parameter in the list
If no default is given, then it is default_value is None (not Leaf(token.NAME, 'None'))
"""
assert raw_params[0].type == token.STAR and len(raw_params) > 2
curr_idx = 2 # the first place a keyword-only parameter name can be is index 2
max_idx = len(raw_params)
while curr_idx < max_idx:
curr_item = raw_params[curr_idx]
prev_item = curr_item.prev_sibling
if curr_item.type != token.NAME:
curr_idx += 1
continue
if prev_item is not None and prev_item.type == token.DOUBLESTAR:
break
name = curr_item.value
nxt = curr_item.next_sibling
if nxt is not None and nxt.type == token.EQUAL:
default_value = nxt.next_sibling
curr_idx += 2
else:
default_value = None
yield (name, default_value)
curr_idx += 1
示例2: remove_params
# 需要导入模块: from lib2to3.fixer_util import token [as 别名]
# 或者: from lib2to3.fixer_util.token import DOUBLESTAR [as 别名]
def remove_params(raw_params, kwargs_default=_kwargs_default_name):
u"""
Removes all keyword-only args from the params list and a bare star, if any.
Does not add the kwargs dict if needed.
Returns True if more action is needed, False if not
(more action is needed if no kwargs dict exists)
"""
assert raw_params[0].type == token.STAR
if raw_params[1].type == token.COMMA:
raw_params[0].remove()
raw_params[1].remove()
kw_params = raw_params[2:]
else:
kw_params = raw_params[3:]
for param in kw_params:
if param.type != token.DOUBLESTAR:
param.remove()
else:
return False
else:
return True
示例3: needs_fixing
# 需要导入模块: from lib2to3.fixer_util import token [as 别名]
# 或者: from lib2to3.fixer_util.token import DOUBLESTAR [as 别名]
def needs_fixing(raw_params, kwargs_default=_kwargs_default_name):
u"""
Returns string with the name of the kwargs dict if the params after the first star need fixing
Otherwise returns empty string
"""
found_kwargs = False
needs_fix = False
for t in raw_params[2:]:
if t.type == token.COMMA:
# Commas are irrelevant at this stage.
continue
elif t.type == token.NAME and not found_kwargs:
# Keyword-only argument: definitely need to fix.
needs_fix = True
elif t.type == token.NAME and found_kwargs:
# Return 'foobar' of **foobar, if needed.
return t.value if needs_fix else u''
elif t.type == token.DOUBLESTAR:
# Found either '*' from **foobar.
found_kwargs = True
else:
# Never found **foobar. Return a synthetic name, if needed.
return kwargs_default if needs_fix else u''
示例4: transform
# 需要导入模块: from lib2to3.fixer_util import token [as 别名]
# 或者: from lib2to3.fixer_util.token import DOUBLESTAR [as 别名]
def transform(self, node, results):
params_rawlist = results[u"params"]
for i, item in enumerate(params_rawlist):
if item.type == token.STAR:
params_rawlist = params_rawlist[i:]
break
else:
return
# params is guaranteed to be a list starting with *.
# if fixing is needed, there will be at least 3 items in this list:
# [STAR, COMMA, NAME] is the minimum that we need to worry about.
new_kwargs = needs_fixing(params_rawlist)
# new_kwargs is the name of the kwargs dictionary.
if not new_kwargs:
return
suitify(node)
# At this point, params_rawlist is guaranteed to be a list
# beginning with a star that includes at least one keyword-only param
# e.g., [STAR, NAME, COMMA, NAME, COMMA, DOUBLESTAR, NAME] or
# [STAR, COMMA, NAME], or [STAR, COMMA, NAME, COMMA, DOUBLESTAR, NAME]
# Anatomy of a funcdef: ['def', 'name', parameters, ':', suite]
# Anatomy of that suite: [NEWLINE, INDENT, first_stmt, all_other_stmts]
# We need to insert our new stuff before the first_stmt and change the
# first_stmt's prefix.
suite = node.children[4]
first_stmt = suite.children[2]
ident = indentation(first_stmt)
for name, default_value in gen_params(params_rawlist):
if default_value is None:
suite.insert_child(2, Newline())
suite.insert_child(2, String(_assign_template %{u'name':name, u'kwargs':new_kwargs}, prefix=ident))
else:
suite.insert_child(2, Newline())
suite.insert_child(2, String(_else_template %{u'name':name, u'default':default_value}, prefix=ident))
suite.insert_child(2, Newline())
suite.insert_child(2, String(_if_template %{u'assign':_assign_template %{u'name':name, u'kwargs':new_kwargs}, u'name':name, u'kwargs':new_kwargs}, prefix=ident))
first_stmt.prefix = ident
suite.children[2].prefix = u""
# Now, we need to fix up the list of params.
must_add_kwargs = remove_params(params_rawlist)
if must_add_kwargs:
arglist = results[u'arglist']
if len(arglist.children) > 0 and arglist.children[-1].type != token.COMMA:
arglist.append_child(Comma())
arglist.append_child(DoubleStar(prefix=u" "))
arglist.append_child(Name(new_kwargs))