I think this question is a bit off topic for Stack Overflow, but you can try to google "ASCII art Python" and get things like: http://www.youtube.com/watch?v=NEWuZfTNoJE

OR you can try to do it yourself, here's an outline:

rows = 13 # Maximum height of character

# 0 is a , 1 is b and so on...
alphabeth = [[
r'''           ''',
r'''           ''',
r'''           ''',
r'''           ''',
r'''           ''',
r'''    __     ''',
r''' .:--.'.   ''',
r'''/ |   \ |  ''',
r'''`" __ | |  ''',
r''' .'.''| |  ''',
r'''/ /   | |_ ''',
r'''\ \._,\ '/ ''',
r''' `--'  `"  ''']]

text = raw_input('Enter text:\n')
c = map(lambda x: ord(x)-ord('a'),text)
for i in range(rows):
    for j in c:
        print alphabeth[j][i],
    print ""