Shulou(Shulou.com)05/31 Report--

This article introduces the relevant knowledge of "what are the basic knowledge points commonly used in Python language". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Summary of 12 kinds of basic knowledge commonly used in python programming: regular expression replacement, traversal directory method, list sorting by column, deduplication, dictionary sorting, dictionary, list, string conversion, time object operation, command line parameter parsing (getopt), print format output, binary conversion, Python call system commands or scripts, Python read and write files.

1. Regular expression replacement

Goal: replace the overview.gif in the string line with another string.

> line ='

> mo.sub (ringing replacekeeper strand _\ 1parallel line)'

'

> mo.sub (r'"testetstset"', line)'

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