How to Convert CamelCase to Snake_case in Python?

Convert CamelCase to snake_case

CamelCase and snake_case are two common naming conventions used in programming. CamelCase is often used for class and method names, while snake_case is used for variable and function names.

There are many ways to convert between these two naming conventions. One simple way is to use a regular expression. The following regular expression will match any uppercase letter that is preceded by a lowercase letter:

(?<=[a-z])(?=[A-Z])

Once we have a regular expression that can match the uppercase letters, we can replace them with an underscore. The following code shows how to do this:

import re
pattern = re.compile(r'(?<=[a-z])(?=[A-Z])')
name = pattern.sub('_', name)
name = name.lower()

Here's an example of how to use this function:

>>> convert('CamelCase')
'camel_case'

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