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Dictionary work as a container that hold data.Dictionary is a set of key and value pair,enclosed within curly braces.Dictionary is mutable i.e., value can be updated.
item ={1,2,'Rahul','Rohit',3,4,'a'}
print item
output:{1,2,'Rahul','Rohit',3,4,'a'}
item = {key1:value1,key2:value2}
item1 ={'name':'Rahul','id':123}
print item1
output:{'name':'Rahul','id':123}
item1={'rollno':1, 'Name':'Rahul', 'Class':'12'}
item2={'rollno':2, 'Name':'Mohit', 'Class':'11'}
item1['Class']='10'
item2['Grade']=1
item1['Grade']=2
print item1
print item2
output:
{'rollno':1, 'Name':'Rahul', 'Class':'10', 'Grade':1}
{'rollno':2, 'Name':'Mohit', 'Class':'11', 'Grade':2}
del statement is used for deleting operation.
item={1:'Rahul', 2:'Mohit', 3:'Kumar'}
del item[3]
print item
del item
print item
output:
{1:'Rahul', 2:'Mohit'}
NameError: name 'item' is not defined
| Dict.cmp() | Compares elements of both dict |
| Dict.len() | Total length of the dictionary |
| Dict.str() | Printable string representation of a dictionary |
| Dict.type() | Returns the type of the variable |
| Dict.clear() | Removes all elements of dictionary |
| Dict.copy() | Returns a shallow copy of dictionary |
| Dict.fromkeys() | Create a new dictionary with keys from seq and values set to value |
| Dict.get() | For key, returns value or default if key not in dictionary |
| Dict.has_key() | Returns true if key in dictionary dict, false otherwise |
| Dict.items() | Returns a list of dict tuple pairs |
| Dict.keys() | Returns list of dictionary keys |
| Dict.setdefault() | Set key as default if key is not already in dict |
| Dict.update() | Add dictionary |
| Dict.values() | Returns list of dictionary dict’s values |