A simple way python loops through dictionary elements _python

A simple for statement loops through all the keys of the dictionary, just as it does with sequences:

In [1]: D = {' X ': 1, ' Y ': 2, ' Z ': 3} in

[2]: for key in D:
  ...:   print key, ' corresponds to ', D[key]
  ...: 
Y corresponds to 2
x corresponds to 1
z corresponds to 3

Before python2.2, you can only use the dictionary methods such as Beys to get the keys (because the dictionary is not allowed to iterate directly). If you only need values, you can use d.values instead of D.keys. The D.items method returns the key-value pair as a tuple, and one of the benefits of the For loop is that the sequence can be used in loops:

In [4]: for key, value in D.items ():
  ...:   print key, ' corresponds to ', Value
  ...: 
y corresponds to 2
  x corresponds to 1
z corresponds to 3

Note: The Order of dictionary elements is usually undefined. In other words, when iterating, the keys and values in the dictionary are guaranteed to be processed, but the processing order is uncertain. If the order is important, you can save the key values in a separate list, such as sorting before iterating.

This Python loop to iterate through the dictionary elements of the simple method is to share all the content of the small, hope to give you a reference, but also hope that we support the cloud habitat community.