字典dict
字典dict
dict：{'name': 'wupeiqi', 'age': 18} 、{'host': '2.2.2.2', 'port': 80]}
class dict(object):
dict() -> new empty dictionary
dict(mapping) -> new dictionary initialized from a mapping object's
(key, value) pairs
dict(iterable) -> new dictionary initialized as if via:
d = {}
for k, v in iterable:
d[k] = v
dict(**kwargs) -> new dictionary initialized with the name=value pairs
in the keyword argument list. For example: dict(one=1, two=2)
def clear(self):清除内容
D.clear() -> None. Remove all items from D.
pass
def copy(self):
浅拷贝
D.copy() -> a shallow copy of D
pass
@staticmethod # known case
def fromkeys(S, v=None):
dict.fromkeys(S[,v]) -> New dict with keys from S and values equal to v.
v defaults to None.
pass
def get(self, k, d=None):根据key获取值，d是默认值
D.get(k[,d]) -> D[k] if k in D, else d. d defaults to None.
pass
def has_key(self, k):是否有key
D.has_key(k) -> True if D has a key k, else False
return False
def items(self):所有项的列表形式
D.items() -> list of D's (key, value) pairs, as 2-tuples
return []
def iteritems(self):项可迭代
D.iteritems() -> an iterator over the (key, value) items of D
pass
def iterkeys(self):key可迭代
D.iterkeys() -> an iterator over the keys of D
pass
def itervalues(self):value可迭代
D.itervalues() -> an iterator over the values of D
pass
def keys(self):所有的key列表
D.keys() -> list of D's keys
return []
def pop(self, k, d=None):获取并在字典中移除
D.pop(k[,d]) -> v, remove specified key and return the corresponding value.
If key is not found, d is returned if given, otherwise KeyError is raised
pass
def popitem(self):获取并在字典中移除
D.popitem() -> (k, v), remove and return some (key, value) pair as a
2-tuple; but raise KeyError if D is empty.
pass
def setdefault(self, k, d=None):如果key不存在，则创建，如果存在，则返回已存在的值且不修改
D.setdefault(k[,d]) -> D.get(k,d), also set D[k]=d if k not in D
pass
def update(self, E=None, **F):更新
{'name':'alex', 'age': 18000}
[('name','sbsbsb'),]
D.update([E, ]**F) -> None. Update D from dict/iterable E and F.
If E present and has a .keys() method, does: for k in E: D[k] = E[k]
If E present and lacks .keys() method, does: for (k, v) in E: D[k] = v
In either case, this is followed by: for k in F: D[k] = F[k]
pass
def values(self):所有的值
D.values() -> list of D's values
return []
def viewitems(self):所有项，只是将内容保存至view对象中
D.viewitems() -> a set-like object providing a view on D's items
pass
def viewkeys(self):
D.viewkeys() -> a set-like object providing a view on D's keys
pass
def viewvalues(self):
D.viewvalues() -> an object providing a view on D's values
pass
def __cmp__(self, y):
x.__cmp__(y) <==> cmp(x,y)
pass
def __contains__(self, k):
D.__contains__(k) -> True if D has a key k, else False
return False
def __delitem__(self, y):
x.__delitem__(y) <==> del x[y]
pass
def __eq__(self, y):
x.__eq__(y) <==> x==y
pass
def __getattribute__(self, name):
x.__getattribute__('name') <==> x.name
pass
def __getitem__(self, y):
x.__getitem__(y) <==> x[y]
pass
def __ge__(self, y):
x.__ge__(y) <==> x>=y
pass
def __gt__(self, y):
x.__gt__(y) <==> x>y
pass
def __init__(self, seq=None, **kwargs): # known special case of dict.__init__
dict() -> new empty dictionary
dict(mapping) -> new dictionary initialized from a mapping object's
(key, value) pairs
dict(iterable) -> new dictionary initialized as if via:
d = {}
for k, v in iterable:
d[k] = v
dict(**kwargs) -> new dictionary initialized with the name=value pairs
in the keyword argument list. For example: dict(one=1, two=2)
# (copied from class doc)
pass
def __iter__(self):
x.__iter__() <==> iter(x)
pass
def __len__(self):
x.__len__() <==> len(x)
pass
def __le__(self, y):
x.__le__(y) <==> x<=y
pass
def __lt__(self, y):
x.__lt__(y) <==> x<y
pass
@staticmethod # known case of __new__
def __new__(S, *more):
T.__new__(S, ...) -> a new object with type S, a subtype of T
pass
def __ne__(self, y):
x.__ne__(y) <==> x!=y
pass
def __repr__(self):
x.__repr__() <==> repr(x)
pass
def __setitem__(self, i, y):
x.__setitem__(i, y) <==> x[i]=y
pass
def __sizeof__(self):
D.__sizeof__() -> size of D in memory, in bytes
pass
