Python 2.7: Print to File

Question

Why does trying to print directly to a file instead of sys.stdout produce the following syntax error:

Python 2.7.2+ (default, Oct  4 2011, 20:06:09) [GCC 4.6.1] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> f1=open('./testfile', 'w+') >>> print('This is a test', file=f1)   File "<stdin>", line 1     print('This is a test', file=f1)                             ^ SyntaxError: invalid syntax 

From help(__builtins__) I have the following info:

print(...)     print(value, ..., sep=' ', end='\n', file=sys.stdout)      Prints the values to a stream, or to sys.stdout by default.     Optional keyword arguments:     file: a file-like object (stream); defaults to the current sys.stdout.     sep:  string inserted between values, default a space.     end:  string appended after the last value, default a newline. 

So what would be the right syntax to change the standard stream print writes to?

I know that there are different maybe better ways to write to file but I really don't get why this should be a syntax error...

A nice explanation would be appreciated!

Answer 1

If you want to use the print function in Python 2, you have to import from __future__:

from __future__ import print_function 

But you can have the same effect without using the function, too:

print >>f1, 'This is a test' 

Answer 2

print is a keyword in python 2.X. You should use the following:

f1=open('./testfile', 'w+') f1.write('This is a test') f1.close()