>>> "hello world".title()
'Hello World'
>>> u"hello world".title()
u'Hello World'

>>> "they're bill's friends from the UK".title()
"They'Re Bill'S Friends From The Uk"

s = 'the brown fox'
lst = [word[0].upper() + word[1:] for word in s.split()]
s = " ".join(lst)

import re
s = 'the brown fox'

def repl_func(m):
    """process regular expression match groups for word upper-casing problem"""
    return m.group(1) + m.group(2).upper()

s = re.sub("(^|s)(S)", repl_func, s)


>>> re.sub("(^|s)(S)", repl_func, s)
"They're Bill's Friends From The UK"

>>> ' '.join([s[0].upper() + s[1:] for s in "they're bill's friends from the UK".split(' ')])
"They're Bill's Friends From The UK"

input = "they're bill's friends from the UK"
words = input.split(' ')
capitalized_words = []
for word in words:
    title_case_word = word[0].upper() + word[1:]
    capitalized_words.append(title_case_word)
output = ' '.join(capitalized_words)