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copy(a) >>> b [[]] # b is not the same list as a, just a copy >>> b is a False # But the list b[0] is the same the same list as the list a[0], and changing one will # also change the other This is what is known as a shallow copy a and b are # different at the top level, but if you go one level down, you have references to # to the same things if you go deep enough, it's not a copy, # it's the same object >>> b[0]append('test') >>> a [['test']] >>> b [['test']] To effectively create a copy of a mutable object, you have two choices You can either create what is known as a shallow copy or a deep copy of the original object. vb.net code 39 reader VB . NET Image: Example to Read Code 39 Barcode with VB . NET Codes in ...
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Free to download .NET, C#, VB . NET barcode reader app for Code 39 ; C# Code 39 recognition SDK; VB . NET Code 39 recognition SDK. The difference is that a shallow copy of an object will create a new object and then populate it with references to the items that are contained in the original object Hence, if you modify any of those items then each object will be affected since they both reference the same items A deep copy creates a new object and then recursively copies the contents of the original object into the new copy Once you perform a deep copy of an object then you can perform operations on any object contained in the copy without affecting the original You can use the deepcopy function in the copy module of the Python standard library to create such a copy Let s look at some more examples of creating copies in order to give you a better idea of how this works.. word ean 13, barcode ms word 2007, birt qr code, word pdf 417, upc-a word font, birt upc-a vb.net code 39 reader read code 39 barcode with vb . net - Stack Overflow
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