4.字典丶列表丶元组的一些常用操作

1.字典（无序）

1.创建字典:

person = {"name": "mr.wu", 'age': 18}
或
person = dict({"name": "mr.wu", 'age': 18})
或
person = dict(name="mr.wu",age="18")        

2.字典的常用操作  

• 索引
• 新增
• 删除
• 键、值、键值对
• 循环
• 长度

• 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): # real signature unknown; restored from __doc__
          """ 清除内容 """
          """ D.clear() -> None.  Remove all items from D. """
          pass
  
      def copy(self): # real signature unknown; restored from __doc__
          """ 浅拷贝 """
          """ D.copy() -> a shallow copy of D """
          pass
  
      @staticmethod # known case
      def fromkeys(S, v=None): # real signature unknown; restored from __doc__
          """
          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): # real signature unknown; restored from __doc__
          """ 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): # real signature unknown; restored from __doc__
          """ 是否有key """
          """ D.has_key(k) -> True if D has a key k, else False """
          return False
  
      def items(self): # real signature unknown; restored from __doc__
          """ 所有项的列表形式 """
          """ D.items() -> list of D's (key, value) pairs, as 2-tuples """
          return []
  
      def iteritems(self): # real signature unknown; restored from __doc__
          """ 项可迭代 """
          """ D.iteritems() -> an iterator over the (key, value) items of D """
          pass
  
      def iterkeys(self): # real signature unknown; restored from __doc__
          """ key可迭代 """
          """ D.iterkeys() -> an iterator over the keys of D """
          pass
  
      def itervalues(self): # real signature unknown; restored from __doc__
          """ value可迭代 """
          """ D.itervalues() -> an iterator over the values of D """
          pass
  
      def keys(self): # real signature unknown; restored from __doc__
          """ 所有的key列表 """
          """ D.keys() -> list of D's keys """
          return []
  
      def pop(self, k, d=None): # real signature unknown; restored from __doc__
          """ 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): # real signature unknown; restored from __doc__
          """ 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): # real signature unknown; restored from __doc__
          """ 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): # known special case of dict.update
          """ 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): # real signature unknown; restored from __doc__
          """ 所有的值 """
          """ D.values() -> list of D's values """
          return []
  
      def viewitems(self): # real signature unknown; restored from __doc__
          """ 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): # real signature unknown; restored from __doc__
          """ D.viewkeys() -> a set-like object providing a view on D's keys """
          pass
  
      def viewvalues(self): # real signature unknown; restored from __doc__
          """ D.viewvalues() -> an object providing a view on D's values """
          pass
  
      def __cmp__(self, y): # real signature unknown; restored from __doc__
          """ x.__cmp__(y) <==> cmp(x,y) """
          pass
  
      def __contains__(self, k): # real signature unknown; restored from __doc__
          """ D.__contains__(k) -> True if D has a key k, else False """
          return False
  
      def __delitem__(self, y): # real signature unknown; restored from __doc__
          """ x.__delitem__(y) <==> del x[y] """
          pass
  
      def __eq__(self, y): # real signature unknown; restored from __doc__
          """ x.__eq__(y) <==> x==y """
          pass
  
      def __getattribute__(self, name): # real signature unknown; restored from __doc__
          """ x.__getattribute__('name') <==> x.name """
          pass
  
      def __getitem__(self, y): # real signature unknown; restored from __doc__
          """ x.__getitem__(y) <==> x[y] """
          pass
  
      def __ge__(self, y): # real signature unknown; restored from __doc__
          """ x.__ge__(y) <==> x>=y """
          pass
  
      def __gt__(self, y): # real signature unknown; restored from __doc__
          """ 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): # real signature unknown; restored from __doc__
          """ x.__iter__() <==> iter(x) """
          pass
  
      def __len__(self): # real signature unknown; restored from __doc__
          """ x.__len__() <==> len(x) """
          pass
  
      def __le__(self, y): # real signature unknown; restored from __doc__
          """ x.__le__(y) <==> x<=y """
          pass
  
      def __lt__(self, y): # real signature unknown; restored from __doc__
          """ x.__lt__(y) <==> x<y """
          pass
  
      @staticmethod # known case of __new__
      def __new__(S, *more): # real signature unknown; restored from __doc__
          """ T.__new__(S, ...) -> a new object with type S, a subtype of T """
          pass
  
      def __ne__(self, y): # real signature unknown; restored from __doc__
          """ x.__ne__(y) <==> x!=y """
          pass
  
      def __repr__(self): # real signature unknown; restored from __doc__
          """ x.__repr__() <==> repr(x) """
          pass
  
      def __setitem__(self, i, y): # real signature unknown; restored from __doc__
          """ x.__setitem__(i, y) <==> x[i]=y """
          pass
  
      def __sizeof__(self): # real signature unknown; restored from __doc__
          """ D.__sizeof__() -> size of D in memory, in bytes """
          pass
  
      __hash__ = None
  
  dict

2.列表

1.创建列表：

name_list = ['alex', 'seven', 'eric']
或
name_list ＝ list(['alex', 'seven', 'eric'])

2.字典的常用操作  

• 索引
• 切片
• 追加
• 删除
• 长度
• 切片
• 循环
• 包含

3.元组

1.创建元组：

ages = (11, 22, 33, 44, 55)
或
ages = tuple((11, 22, 33, 44, 55))

2.元组的常用操作  

• 索引
• 切片
• 循环
• 长度
• 包含

lass tuple(object):
    """
    tuple() -> empty tuple
    tuple(iterable) -> tuple initialized from iterable's items
    
    If the argument is a tuple, the return value is the same object.
    """
    def count(self, value): # real signature unknown; restored from __doc__
        """ T.count(value) -> integer -- return number of occurrences of value """
        return 0

    def index(self, value, start=None, stop=None): # real signature unknown; restored from __doc__
        """
        T.index(value, [start, [stop]]) -> integer -- return first index of value.
        Raises ValueError if the value is not present.
        """
        return 0

    def __add__(self, y): # real signature unknown; restored from __doc__
        """ x.__add__(y) <==> x+y """
        pass

    def __contains__(self, y): # real signature unknown; restored from __doc__
        """ x.__contains__(y) <==> y in x """
        pass

    def __eq__(self, y): # real signature unknown; restored from __doc__
        """ x.__eq__(y) <==> x==y """
        pass

    def __getattribute__(self, name): # real signature unknown; restored from __doc__
        """ x.__getattribute__('name') <==> x.name """
        pass

    def __getitem__(self, y): # real signature unknown; restored from __doc__
        """ x.__getitem__(y) <==> x[y] """
        pass

    def __getnewargs__(self, *args, **kwargs): # real signature unknown
        pass

    def __getslice__(self, i, j): # real signature unknown; restored from __doc__
        """
        x.__getslice__(i, j) <==> x[i:j]
                   
                   Use of negative indices is not supported.
        """
        pass

    def __ge__(self, y): # real signature unknown; restored from __doc__
        """ x.__ge__(y) <==> x>=y """
        pass

    def __gt__(self, y): # real signature unknown; restored from __doc__
        """ x.__gt__(y) <==> x>y """
        pass

    def __hash__(self): # real signature unknown; restored from __doc__
        """ x.__hash__() <==> hash(x) """
        pass

    def __init__(self, seq=()): # known special case of tuple.__init__
        """
        tuple() -> empty tuple
        tuple(iterable) -> tuple initialized from iterable's items
        
        If the argument is a tuple, the return value is the same object.
        # (copied from class doc)
        """
        pass

    def __iter__(self): # real signature unknown; restored from __doc__
        """ x.__iter__() <==> iter(x) """
        pass

    def __len__(self): # real signature unknown; restored from __doc__
        """ x.__len__() <==> len(x) """
        pass

    def __le__(self, y): # real signature unknown; restored from __doc__
        """ x.__le__(y) <==> x<=y """
        pass

    def __lt__(self, y): # real signature unknown; restored from __doc__
        """ x.__lt__(y) <==> x<y """
        pass

    def __mul__(self, n): # real signature unknown; restored from __doc__
        """ x.__mul__(n) <==> x*n """
        pass

    @staticmethod # known case of __new__
    def __new__(S, *more): # real signature unknown; restored from __doc__
        """ T.__new__(S, ...) -> a new object with type S, a subtype of T """
        pass

    def __ne__(self, y): # real signature unknown; restored from __doc__
        """ x.__ne__(y) <==> x!=y """
        pass

    def __repr__(self): # real signature unknown; restored from __doc__
        """ x.__repr__() <==> repr(x) """
        pass

    def __rmul__(self, n): # real signature unknown; restored from __doc__
        """ x.__rmul__(n) <==> n*x """
        pass

    def __sizeof__(self): # real signature unknown; restored from __doc__
        """ T.__sizeof__() -- size of T in memory, in bytes """
        pass

tuple