"TypeError: cannot concatenate 'str' and 'int' objects" when trying to use printf-style formatting
concatenation, integer, python, string, typeerror
Solution
`%` has a higher precedence than `+`, so `s % y + z` is parsed as `(s % y) + z`.
If `s` is a string, then `s % x` is a string, and `(s % y) + z` attempts to add a string (the result of `s % y`) and an integer (the value of `z`).
Problem
I don't see problem in here, but Python thinks different: ``` x = 3 y = 7 z = 2 print "I told to the Python, that the first variable is %d!" % x print "Anyway, 2nd and 3rd variables sum is %d. :)" % y + z ``` I get `TypeError: cannot concatenate 'str' and 'int' objects`. Why is that so? I haven't setted any variable as string... as much as I see.