dasacc22, 08.05.2010 19:19:
This is a simple question. I'm looking for the fastest way to
calculate the leading whitespace (as a string, ie ' ').
Here is an (untested) Cython 0.13 solution:
from cpython.unicode cimport Py_UNICODE_ISSPACE
def leading_whitespace(unicode ustring):
cdef Py_ssize_t i
cdef Py_UNICODE uchar
for i, uchar in enumerate(ustring):
if not Py_UNICODE_ISSPACE(uchar):
return ustring[:i]
return ustring
Cython compiles this to the obvious C code, so this should be impossible to
beat in plain Python code.
However, since Cython 0.13 hasn't been officially released yet (may take
another couple of weeks or so), you'll need to use the current developer
version from here:
http://hg.cython.org/cython-devel
Stefan
--
http://mail.python.org/mailman/listinfo/python-list
