Summarize 3 methods of merging strings in Python

This article mainly introduces 3 methods of Pythonmerging strings. This article explains the use of +=operator, the use of % operator, Use the ' '.join() method of String for 3 methods. Friends who need it can refer to the following

Purpose

Merging strings into one large string, more consideration is given to performance

Method

Common methods include the following:

1. Use the += operator

　　BigString=small1+small2+small3+...+smalln

For example, there is a fragment pieces=['Today','is','really' ,'a','good','day'], we want to connect it

BigString=' '
for e in pieces:
        BigString+=e+' '

or use

import operator
BigString=reduce(operator.add,pieces,' ')

2. Use the % operator

In [33]: print '%s,Your current money is %.1f'%('Nupta',500.52)
Nupta,Your current money is 500.5

3. Use String's ' '.join() method

In [34]: ' '.join(pieces)
Out[34]: 'Today is really a good day'

About performance

There are a small number of strings that need to be spliced , try to use the % operator to keep the code readable

There are a large number of strings that need to be spliced, use the ''.join method, which only uses a copy of the pieces without creating an intermediate between the sub-items. result.

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