What is the Python fromkeys function? What is the role of the Fromkeys function?

In this article, we will learn about the Python fromkeys function in the Python dictionary, what the fromkeys function means, and what the function is going to be answered in the next article.

Describe

The Python dictionary Fromkeys () function is used to create a new dictionary, which is the key to the dictionary of elements in the sequence SEQ, and value is the initial value corresponding to all keys in the dictionary.

Grammar

Romkeys () method syntax:

Dict.fromkeys (seq[, value])

Parameters

SEQ--Dictionary key value list.

Value--an optional parameter that sets the values of the key sequence (seq).

return value

The method returns a new dictionary.

Instance

The following example shows how the Fromkeys () function is used:

#!/usr/bin/python#-*-coding:utf-8-*-seq = (' Google ', ' Runoob ', ' Taobao ') dict = Dict.fromkeys (seq) print "New dictionary:%s"% STR (dict) dict = Dict.fromkeys (seq, ten) print "New dictionary:%s"% str (DICT)

The result of the above example output is:

The new dictionary is: {' Google ': none, ' Taobao ': None, ' Runoob ': none} The new dictionary is: {' Google ': ten, ' Taobao ': Ten, ' Runoob ': 10}