Python Basics (7): Basic data Type (DICT)

Dictionary (dict):

Description: A dictionary is another mutable container model and can store any type of object. Each key value of the dictionary (Key=>value) is split with a colon (:), each pair is separated by a comma (,), and the entire dictionary is included in curly braces {} . Format:d = {key1 : value1, key2 : value2 }

Example:

　　　　Dict = {'name': ' nios', 'age': ' +', ' sex ' : 'male'}

Basic operation:

• Index
• New
• Delete
• Key, value, key-value pairs
• Cycle
• Length

classDict (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 Iterabl E: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)"""    defClear (self):#real signature unknown; restored from __doc__        """d.clear (), None. Remove all items from D."""        Pass    defCopy (self):#real signature unknown; restored from __doc__        """d.copy (), a shallow copy of D"""        Pass@staticmethod#known case    defFromkeys (*args, **kwargs):#Real Signature Unknown        """Returns a new dict with keys from iterable and values equal to value."""        Pass    defGet (self, k, d=none):#real signature unknown; restored from __doc__        """D.get (K[,d]), D[k] if k in D, else D. D defaults to None. """        Pass    defItems (self):#real signature unknown; restored from __doc__        """D.items () a Set-like object providing a view on D ' s items"""        Pass    defKeys (self):#real signature unknown; restored from __doc__        """D.keys () a Set-like object providing a view on D ' s keys"""        Pass    defPop (self, k, d=none):#real signature unknown; restored from __doc__        """D.pop (K[,d])-V, remove specified key and return the corresponding value. If key is no found, D is returned if given, otherwise keyerror is raised"""        Pass    defPopitem (self):#real signature unknown; restored from __doc__        """D.popitem (), (k, v), remove and return some (key, value) pair as a 2-tuple; but raise keyerror if        D is empty. """        Pass    defSetDefault (self, k, d=none):#real signature unknown; restored from __doc__        """D.setdefault (K[,d]), D.get (K,d), also set D[k]=d if K not in D"""        Pass    defUpdate (self, E=none, **f):#known special case of Dict.update        """d.update ([E,]**f), None.        Update D from Dict/iterable E and F. If E is present and have a. Keys () method, then Does:for k in e:d[k] = E[k] If e is present and lacks a. Keys () m Ethod, then does:for K, v in e:d[k] = V In either case, the is followed By:for k in f:d[k] = F[k] """        Pass    defVALUES (self):#real signature unknown; restored from __doc__        """d.values () A object providing a view on D ' s values"""        Pass    def __contains__(Self, *args, **kwargs):#Real Signature Unknown        """True If D has a key k, else False."""        Pass    def __delitem__(Self, *args, **kwargs):#Real Signature Unknown        """Delete Self[key]."""        Pass    def __eq__(Self, *args, **kwargs):#Real Signature Unknown        """Return Self==value."""        Pass    def __getattribute__(Self, *args, **kwargs):#Real Signature Unknown        """Return getattr (self, name)."""        Pass    def __getitem__(Self, y):#real signature unknown; restored from __doc__        """x.__getitem__ (y) <==> X[y]"""        Pass    def __ge__(Self, *args, **kwargs):#Real Signature Unknown        """Return Self>=value."""        Pass    def __gt__(Self, *args, **kwargs):#Real Signature Unknown        """Return Self>value."""        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=va  Lue pairs in the keyword argument list. For Example:dict (one=1, two=2) # (copied from class Doc)"""        Pass    def __iter__(Self, *args, **kwargs):#Real Signature Unknown        """Implement iter (self)."""        Pass    def __len__(Self, *args, **kwargs):#Real Signature Unknown        """Return len (self)."""        Pass    def __le__(Self, *args, **kwargs):#Real Signature Unknown        """Return Self<=value."""        Pass    def __lt__(Self, *args, **kwargs):#Real Signature Unknown        """Return Self<value."""        Pass@staticmethod#known case of __new__    def __new__(*args, **kwargs):#Real Signature Unknown        """Create and return a new object. See Help (type) for accurate signature. """        Pass    def __ne__(Self, *args, **kwargs):#Real Signature Unknown        """Return Self!=value."""        Pass    def __repr__(Self, *args, **kwargs):#Real Signature Unknown        """Return repr (self)."""        Pass    def __setitem__(Self, *args, **kwargs):#Real Signature Unknown        """Set Self[key] to value."""        Pass    def __sizeof__(self):#real signature unknown; restored from __doc__        """d.__sizeof__ (), size of D in memory, in bytes"""        Pass    __hash__= None

Dict

Common functions:

Index Example (index value is key):

Name_dict = {'name':'Nios',' Age': 100,'Sex':'male'}Print(name_dict['name'])Print(name_dict[' Age'])Print(name_dict['Sex']) operation Result: Nios100male

For loop Example:

　　

Python Basics (7): Basic data Type (DICT)