"Ryan Wu" <seasider...@gmail.com> wrote
I am a newbie of python, and reading 'python essential reference'.
Now I want to print this results
'a is %d' % a -> a is 42
with the code
a = 42
test = "'a is %d' % a"
test is now a literal string
print( '%20s ->' % test, test)
And this inserts the literal string into the format string then
prints the literal string
What I think you wanted to do is:
a = 42
test = 'a is %d'
print( '%20s -> %s' % (test, test % a) )
What is the difference of print(test) and print ( 'a is %d' % a )?
In test you have the a inside the string delimiters so it is part
of the string. In the second case a is outside the string and
gets evaluated as a variable
HTH,
--
Alan Gauld
Author of the Learn to Program web site
http://www.alan-g.me.uk/
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