How does Python find all the numbers in a string

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Findall

Finds all the substrings matched by the regular expression in the string and returns a list, if there are multiple matching patterns, a list of tuples, or an empty list if no matches are found.

Note: match and search are matched once findall matches all.

The syntax format is:

Re.findall (pattern, string, flags=0) or pattern.findall (string [, pos [, endpos]])

Parameters:

Pattern matching pattern.

String the string to be matched.

The optional parameter pos, which specifies the starting position of the string, defaults to 0.

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

Find all the numbers in the string:

Import re

Result1 = re.findall (Runoob 123 google 456')

Pattern = re.compile (r'\ dwells') # find numbers

Result2 = pattern.findall ('runoob 123 google 456')

Result3 = pattern.findall ('run88oob123google456', 0,10)

Print (result1)

Print (result2)

Print (result3)

Output result:

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

Multiple matching patterns, returning a list of tuples:

Import re

Result = re.findall (r'(\ w +) = (\ d +)', 'set width=20 and height=10')

Print (result)

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