How can I check if a letter in a string is capitalized using python?

Another, more compact, way to do sdolan's solution in Python 2.7+

>>> test = "asdfGhjkl"
>>> print "upper" if any(map(str.isupper, test)) else "lower"
upper
>>> test = "asdfghjkl"
>>> print "upper" if any(map(str.isupper, test)) else "lower"
lower

Use string.isupper()

letters = "asdfHRbySFss"
uppers = [l for l in letters if l.isupper()]

if you want to bring that back into a string you can do:

print "".join(uppers)