Python

A Print function for different versions of python

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Gribouillis Gribouillis is offline

Offline Dec 20th, 2008, 3:10 pm |

This snippet defines a Print function which can be used with python 2.4, 2.5, 2.6 and 3.0 (for 3.0 this is just the built-in print function). It's interface is that of the python 3.0's print. It simplifies the task of writing transitional code which runs under python 2.5 and python 3.0.

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# module cbprint
# (C) 2008 Gribouillis at www.daniweb.com
 
"""This module defines a Print function to use with python 2.x or 3.x.
 
Usage:
  from cbprint import Print
  Print("hello", "world")
 
It's interface is that of python 3.0's print. See
http://docs.python.org/3.0/library/functions.html?highlight=print#print
"""
__all__ = ["Print"]
import sys
try:
  Print = eval("print") # python 3.0 case
except SyntaxError:
  try:
    D = dict()
    exec("from __future__ import print_function\np=print", D)
    Print = D["p"] # 2.6 case
    del D
  except SyntaxError:
    del D
    def Print(*args, **kwd): # 2.4, 2.5, define our own Print function
      fout = kwd.get("file", sys.stdout)
      w = fout.write
      if args:
        w(str(args[0]))
        sep = kwd.get("sep", " ")
        for a in args[1:]:
          w(sep)
          w(str(a))
      w(kwd.get("end", "\n"))