Depth copy _python

A shallow copy

Copy of the first layer of something, such as a list of other modify their shared second layer (or deeper), he can stop, can only follow the change.

Use: rarely used, shared different accounts associated with:

 

Copy Import 
Husband = [ 'Chen', '123', [15000,9000]] 
wife = copy.copy (Husband)
 wife [0] = "Wang" 
wife [. 1] = '234' # modifying the first layer, there is no change 
print (husband) # [ 'chen ', '123', [15000, 9000]] 
wife [2] [. 1] = 12000 # modifying the second layer will vary 
print (husband) # [ 'chen ', '123', [15000, 12000]]

Second, the deep copy 
fully replicated all changes do not affect

Copy Import
 Husband = [ 'Chen', '123', [15000,9000]] 
wife = copy.deepcopy (Husband)
 wife [0] = "Wang" 
wife [. 1] = '234' # modifying the first layer, there is no change 
print (husband) # [ 'chen ', '123 ', [15000, 9000]] 
wife [2] [. 1] = 12000 # modifying the second layer, no change in 
print (husband) # [ 'chen ', '123 ', [15,000, 9000]]