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This article is about how to concatenate strings in python. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Connection string

Do not recommend way

Def plus_str (): str_list = ['1'] * 10000long_str =''for str in str_list:long_str = long_str + strreturn long_str

Recommended mode

Def join_str (): str_list = ['1'] * 10000return''.join (str_list)

Using the plus sign to concatenate strings is inefficient because strings are frequently copied and memory is allocated, which is time-consuming. But using join to concatenate strings only needs to allocate memory once and copy all the strings to be concatenated to memory space, which is more efficient. On my computer, it takes time to test two functions. When executed 10000 times, the former takes about 24 times as much as the latter. The code is as follows:

Print timeit (stmt= "plus_str ()", setup= "from _ main__ import plus_str", number=10000) / / output: 42.7354210396print timeit (stmt= "join_str ()", setup= "from _ main__ import join_str", number=10000) / / output: 1.78316799643 Thank you for reading! This is the end of this article on "how to connect strings in python". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, you can share it for more people to see!

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