The use of the Fromkeys () method of manipulating dictionaries in Python

This article mainly introduces the use of the Fromkeys () method of manipulating dictionaries in Python, which is the basic knowledge of the introduction of Python, the need of friends can refer to the

The Fromkeys () method creates a new dictionary from the sequence key and the value set to value.

Grammar

The following is the syntax for the Fromkeys () method:

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1	Dict.fromkeys (seq[, value])

Parameters

Seq-This is the list of values that will be used to prepare the keys for the dictionary.

Value-This is optional, and if provided then the value will be set to this value

return value

This method returns a list.

Example

The following example shows the use of the Fromkeys () method.

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#!/usr/bin/python seq = (' name ', ' age ', ' sex ') dict = Dict.fromkeys (seq) print "New Dictionary:%s"% str (dict) dic t = Dict.fromkeys (seq, ten) print "New Dictionary:%s"% str (DICT)

When we run the above program, it produces the following results:

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1 2	New Dictionary: {' age ': none, ' name ': none, ' Sex ': none} New Dictionary: {' age ': Ten, ' name ': ' Sex ': 10}