How python uses the re.sub function

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Re.sub

Re.sub is used to replace matches in a string. The following example replaces the space in the string''with' -':

Import retext = "PythonTab.com is a good Python website" print re.sub (r'\ s subscription,'-', text)

The function prototype of re.sub is: re.sub (pattern, repl, string, count)

Where the second function is the replaced string; in this case,'-'

The fourth parameter refers to the number of substitutions. The default is 0, which means that each match is replaced.

Re.sub also allows the use of functions to perform complex processing of the replacement of matches. For example: re.sub (r'\ s', lambda m:'['+ m.group (0) +']', text, 0); replace the space in the string''with' []'.

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