What is the FindAll function within a python regular expression?

In this article we'll look at the knowledge of python regular Expressions , some of whom may have just come into contact with the programming language of Python, not particularly in this respect, and in the next article will take you to learn about the expressions in the regular expression Python findall function .

Summarized

Finds all substrings that match the regular expression in the string, returns a list, and returns an empty list if no match is found.

(Note: Match and search are matched once findall match all.) ）

The syntax format is:

FindAll (string[, pos[, Endpos])

Parameters

String: strings to be matched.

POS: Optional parameter that specifies the starting position of the string, which defaults to 0.

Endpos: Optional parameter that specifies the end position of the string, which defaults to the length of the string.

For example, find all the numbers in the string:

#-*-Coding:utf8-*-import Re pattern = Re.compile (R ' \d+ ')   # find Numbers result1 = Pattern.findall (' runoob 123 Google 456 ') r ESULT2 = Pattern.findall (' run88oob123google456 ', 0, ten) print (RESULT1) print (RESULT2)

Output Result:

[' 123 ', ' 456 '] [' 88 ', ' 12 ']