Difference between pythondict. get () and dict ['key ']

The following section describes the differences between pythondict. get () and dict [key. I think this is quite good. now I will share it with you and give you a reference. Let's take a look at the code:

In [1]: a = {'name': 'wang'} In [2]:. get ('age') In [3]: a ['age'] ------------------------------------------------------------------------- KeyError Traceback (most recent call last)

 
  
In

  
   
() ----> 1 a ['age'] KeyError: 'age' In [4]: a. get ('age', 10) Out [4]: 10

  

 

Therefore, dict ['key'] can only obtain existing values. if it does not exist, KeyError is triggered.

Dict. get (key, default = None) returns a default value if it does not exist. if it is set, it is set; otherwise, it is None.

In [6]: type (a. get ('age') Out [6]: NoneType

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