The Python Quick Syntax Reference by Gregory Walters

Author:Gregory Walters
Language: eng
Format: epub, pdf
ISBN: 9781430264781
Publisher: Apress

.copy( )

To make a copy of a dictionary, use the .copy() method. This is a shallow copy, which means that the content of the dictionary is not copied directly by value, but by reference and points to the actual original dictionary.

>>> first = {'a':1,'b':2,'c':3}

>>> clone = first.copy()

>>> first

{'a': 1, 'b': 2, 'c': 3}

>>> clone

{'a': 1, 'b': 2, 'c': 3}

.get(key[,default])

Returns a single value by key from a dictionary. Unlike the .pop() method, this does not remove the key/value pair from the dictionary. If key does not exist in dictionary, value from the optional default parameter is returned. If default is not given, returns None.

>>> names = {'lname': 'Frackel', 'city': 'Aurora', 'state': 'CO', 'fname': 'Fred', 'phone':'222-222-2222'}

>>> names

{'lname': 'Frackel', 'city': 'Aurora', 'state': 'CO', 'fname': 'Fred', 'phone':'222-222-2222'}

>>> names.get('lname')

'Frackel'

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