The difference between python dict.get() and dict['key']

Look at the code first:

In [1]: a = {'name': 'wang'} 
 
In [2]: a.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

So, dict['key'] can only get the existing value, if it does not exist, KeyError will be triggered

And 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

The above detailed explanation of the difference between python dict.get() and dict['key'] is all the content shared by the editor. I hope it can give you a reference, and I hope you can support me more. PHP Chinese website.

For more related articles on the difference between python dict.get() and dict['key'], please pay attention to the PHP Chinese website!