how does the % work?

John Gordon gordon at
Fri Mar 22 18:14:42 CET 2013

In <mailman.3612.1363971987.2939.python-list at> leonardo selmi <l.selmi at> writes:

> hi guys

> i wrote this example :

> name = raw_input("What is your name?")
> quest = raw_input("What is your quest?")
> color = raw_input("What is your favorite color?")

> print """Ah, so your name is %s, your quest is %s, 
> and your favorite color is %s."""  % (name, quest, color)

> but i get this error:  Traceback (most recent call last):
>   File "/Users/leonardo/", line 5, in <module>
>     favourite color is %s.''') % (name, quest, color)
> TypeError: unsupported operand type(s) for %: 'NoneType' and 'tuple'

> how can i solve it?

Are you sure you've given us the exact code?  The printed text doesn't
exactly match.  ("favorite" vs. "favourite", three double-quotes vs
three single-quotes, etc.)

The error message also says that the print statement has a
close-parenthesis after the string and before the arguments, which may be
real problem.

John Gordon                   A is for Amy, who fell down the stairs
gordon at              B is for Basil, assaulted by bears
                                -- Edward Gorey, "The Gashlycrumb Tinies"

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