I want to write a printf() function, similar to the one that C has, in Python. Here is the straightforward way to do it: def printf(format, *args): print format % (args), The problem is that the print, statement (including the comma) leaves a trailing whitespace character after printing something. This makes my Python implementation of printf work even more differently from the one in C: # Python printf("Hello"); printf("World!") Hello, World! /* C */ #include main() { printf("Hello"); printf("World!"); } Output: HelloWorld!

Question

I want to write a printf() function, similar to the one that C has, in Python. Here is the straightforward way to do it:

def printf(format, *args):
        print format % (args),

The problem is that the print, statement (including the comma) leaves a trailing whitespace character after printing something. This makes my Python implementation of printf work even more differently from the one in C:

# Python
>>> printf("Hello"); printf("World!")
>>> Hello, World!

/* C */
#include <stdio.h>
main()
{
        printf("Hello");
        printf("World!");
}

Output:

HelloWorld!

anonymous · Answer

How do I fix this?

anonymous · Answer

hmm... it's missing <stdio.h> in the C example O.o

anonymous · Answer

#include <stdio.h>

anonymous · Answer

how come?

anonymous · Answer

I recall typing it in!

wasiqss · Answer

#include<conio.h>

wasiqss · Answer

instead of main write  
void main(void)

anonymous · Answer

it works when you type it an 'answer' box, but not when it's inside the initial question box.

anonymous · Answer

I know my C example is not standard C :-P but it's just supposed to illustrate the problem.

anonymous · Answer

cmon, Python pros out there! a printf() would be useful in python.

anonymous · Answer

http://www.ferg.org/projects/python_gotchas.html#contents_item_4

anonymous · Answer

thanks

anonymous · Answer

How do I write a printf function using sys.stdout.write?

anonymous · Answer

I mean, how do I do formatting?

anonymous · Answer

In python we can simulate C++ 's 'cout' thing http://ideone.com/NkJgt

anonymous · Answer

In python the % operator formats a string with the replacement parameters, and returns the resulting string.  Just because you normally do it as part of a print statement doesn't limit the behavior to printing.

>>> s = "%s, %s!" % ("Hello", "World")
>>> s
'Hello, World!'

No printing necessary.