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What is the advantage of python 2 print over python 3 print? I believe that python 3 print can do everything python 2 print can do on the same level of elegancy

What is the advantage of python 2 print over python 3 print? I believe that python 3 print can do everything python 2 print can do on the same level of elegancy. Also, python 2 print has a weird trailing-comma syntax. When a trailing comma is added to a print statement, a space is printed when another print statement is used. For example, print 'hi', # prints hi (no extra space in the end) print 'hi',; print 'hi' # prints hi hi I personally dislike this syntax because I don't find this natural. Wouldn't it make more sense to print an extra space after the print statement with trailing comma instead of before the next print statement?

zephjc 13y ago
no trailing space is a convenient shorthand - print by itself prints with a newline (so it might make sense to have print() vs println()); print + comma omits the newline and waits for the next print statement, so that print 'hi', do_something() print 'there' and print 'hi', 'there' both yield hi there (Assuming do_something() doesn't call print itself)
- falcolas 13y ago
  FWIW: pprint = functools.partial(print, end=' ') pprint('hi') do_something() print('there') print('hi', 'there', sep=' ') I appreciate the fine grained control, and the ability to do things like `functools.partial` on it. fprint = functools.partial(print, file='/var/log/foo.log') fprint("I'm writing to a file!") fprint("So am I")
  - Fede_V 13y ago
    I understand this, but couldn't you simply wrap print itself in a function, and do that in Python 2.7 already? Granted, your method saves you one line and it's more 'natural'.
    - falcolas 13y ago
      Not really, since the Python 2 version is a keyword, and not a function, you can't simply provide keyword arguments to it. You would instead have to build up a string and eval it. It would have to be something like this (completely untested): def print_wrapper(*args, **kwargs) outfile = None print_stmt = "print " if 'file' in kwargs: outfile = open(kwargs['file'], 'a') print_stmt += '>>outfile ' print_stmt += ", ".join(*args) if 'end' in kwargs and kwargs['end'] == ' ': print_stmt += ',' eval(print_stmt) if outfile is not None: outfile.close() sep and other end values for anything other than ' ' would not be possible. http://docs.python.org/2.6/reference/simple_stmts.html#the-print-statement http://docs.python.org/2.6/reference/simple_stmts.html#the-p...

zephjc 13y ago

no trailing space is a convenient shorthand - print by itself prints with a newline (so it might make sense to have print() vs println()); print + comma omits the newline and waits for the next print statement, so that print 'hi', do_something() print 'there' and print 'hi', 'there' both yield hi there (Assuming do_something() doesn't call print itself)

falcolas 13y ago
FWIW: pprint = functools.partial(print, end=' ') pprint('hi') do_something() print('there') print('hi', 'there', sep=' ') I appreciate the fine grained control, and the ability to do things like `functools.partial` on it. fprint = functools.partial(print, file='/var/log/foo.log') fprint("I'm writing to a file!") fprint("So am I")
- Fede_V 13y ago
  I understand this, but couldn't you simply wrap print itself in a function, and do that in Python 2.7 already? Granted, your method saves you one line and it's more 'natural'.
  - falcolas 13y ago
    Not really, since the Python 2 version is a keyword, and not a function, you can't simply provide keyword arguments to it. You would instead have to build up a string and eval it. It would have to be something like this (completely untested): def print_wrapper(*args, **kwargs) outfile = None print_stmt = "print " if 'file' in kwargs: outfile = open(kwargs['file'], 'a') print_stmt += '>>outfile ' print_stmt += ", ".join(*args) if 'end' in kwargs and kwargs['end'] == ' ': print_stmt += ',' eval(print_stmt) if outfile is not None: outfile.close() sep and other end values for anything other than ' ' would not be possible. http://docs.python.org/2.6/reference/simple_stmts.html#the-print-statement http://docs.python.org/2.6/reference/simple_stmts.html#the-p...