On Thu, 26 Jan 2006 15:40:47 -0800, Murali wrote:
> In Python, dictionaries can have any hashable value as a string.
No. Dictionaries can have any hashable value as a KEY. They are not
automatically converted to strings.
> In particular I can say
>
> d = {}
> d[(1,2)] = "Right"
> d["(1,2)"] = "Wrong"
> d["key"] = "test"
>
> In order to print "test" using % substitution I can say
>
> print "%(key)s" % d
Yes, because the dictionary has a key which is the string "key".
> Is there a way to print "Right" using % substitution?
print "%s" % "Right"
print "%s" % d[(1,2)]
print "%s%s" % ("R", "ight")
and so on.
> print "%((1,2))s" % d
>
> gives me "Wrong".
Yes, because the dictionary has a key which is the string "(1,2)".
> Is there any syntax which will allow me to get "Right" using %
> substitution?
You need to change your strategy. The dictionary form of string
substitution only works with keys which are strings. Look at it this way:
print "something %(x)s something" % somedict
"something %(x)s something" is a string, so all the substrings of it are
also strings, including "x". That's pretty obvious. But the same holds if
you change the x to something else:
print "something %(123.456)s something" % somedict
"123.456" is still a string.
--
Steven.
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