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The has_key() method can check whether the dictionary contains the specified key. If so, then Return True, otherwise return False.
Grammar format:
dictionary_name.has_key(key) dict1 = {'01':'yangry','02':'weild','03':'hexh','04':'huangmg'} print dict1.has_key('02') print dict1.has_key('08') #result True False
2.clear() method
Used to clear all items in the dictionary, no return value.
Usage:
dictionary_name.clear()
3, copy method
copy() The method returns a new dictionary with the same key-value pairs in the following format:
dictionary_targetname = dictionary_sourcenme.copy()
4,fromkeys() method
Use the given keys to create a new dictionary, and the value corresponding to each key value is None.
dictionary_name.fromkeys([key1,key2,...],(default_value))
5, update() method
Format:
update_dictionary.update(source_dictionary) mydict1 = {'1':'yy11','2':'yy22','3':'yy33'} newdict = {'2':'success'} mydict1.update(newdict) print mydict1 #result {'1': 'yy11', '3': 'yy33', '2': 'success'}
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