What is the pythonic way to count the leading spaces in a string?

Question

I know I can count the leading spaces in a string with this:

>>> a = \"   foo bar baz qua   \\n\"
>>> print \"Leading spaces\", len(a) - le         


        

Answer 1

Using next and enumerate:

next((i for i, c in enumerate(a) if c != ' '), len(a))

For any whitespace:

next((i for i, c in enumerate(a) if not c.isspace()), len(a))