3 ways to combine strings in Python

This article describes 3 ways to combine Python strings, and this article explains the use of the + + operator, using the% operator, and using String's '. Join () Method 3 methods, need friends can refer to the following

Objective

Combine some small strings into a large string, with more consideration for performance

Method

There are several common ways to do this:

1. Use the + = operator

The code is as follows:

Bigstring=small1+small2+small3+...+smalln

For example there is a fragment pieces=[' Today ', ' are ', ' really ', ' a ', ' good ', ' Day '], we want to link it up

The code is as follows:

Bigstring= '

For E in pieces:

Bigstring+=e+ '

or use

The code is as follows:

Import operator

Bigstring=reduce (Operator.add,pieces, "")

2. Use% operator

The code is as follows:

In [per]: print '%s,your current%.1f '% (' Nupta ', 500.52)

Nupta,your is 500.5

3. Use string's '. Join () method

The code is as follows:

In [%]: '. Join (Pieces)

OUT[34]: ' Is really a good day '

About Performance

A small number of strings need to be spliced to use the% operator to keep the code readable

There are a lot of strings that need stitching, using the '. Join method, which uses only one pieces copy without having to produce intermediate results between the subkeys.