Speed comparison of finding if a digit exists in a string, in python.

gistfile1.py

>>> cmd = """
... for c in 'xdtwkeltjwlkejt7wthwk89lk':
...     if c.isdigit():
...             break;
... """
>>> 
>>> timeit.Timer(cmd).timeit()
2.1454498767852783
>>> 
>>> 
>>> setup = """
... import re
... """
>>> 
>>> cmd = """
... re.search('\d', 'xdtwkeltjwlkejt7wthwk89lk')
... """
>>> 
>>> timeit.Timer(cmd, setup=setup).timeit()
1.8365380764007568
>>> 
>>> cmd = """
... next((c for c in 'xdtwkeltjwlkejt7wthwk89lk' if c.isdigit()), -1)
... """
>>> 
>>> timeit.Timer(cmd).timeit()
3.0304851531982422