Print syntax error, python 2.7.6

Question

Wrote some code and this syntax error keeps on occuring but I can't solve it. Due to wanting this only to print when verbose option is on I have included all code relating to the error line.

from __future__ import print_function
print = print_function
parser.add_argument("-v", "--verbose", action="store_true",help="Help option"
verboseprint = print  if verbose else lambda *a, **k: None 

                if line2_rev:
                    verboseprint "Line2 has now been reversed"

    verboseprint " Line2 has now been reversed"
                                              ^
SyntaxError: invalid syntax

I have attempted using ' ' instead as well as changing the string inside but same error occured. Any ideas?

Martijn Pieters · Accepted Answer · 2014-05-08 07:57:13Z

3

When you run from __future__ import print_function, print() is a function, not a statement. You cannot use verboseprint as a statement either.

Use it as a function instead:

from __future__ import print_function

parser.add_argument("-v", "--verbose", action="store_true",help="Help option"
verboseprint = print  if verbose else lambda *a, **k: None 

if line2_rev:
    verboseprint("Line2 has now been reversed")

The __future__ import changes the way the compiler works; the print keyword is removed from the language for this specific module, and the built-in print() function which is already present in Python 2 becomes available instead. So instead of:

print "This is printed"

You'd use:

print("This is printed")

but in your code you define a new function that'll work the same.

You don't need to assign print = print_function either in your code.

edited May 8, 2014 at 7:57

answered May 8, 2014 at 7:36

Martijn Pieters

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Comments

Tony Veijalainen · Accepted Answer · 2014-05-08 07:39:03Z

0

When you do import print_function, you do not use something named print_function but you changed to use Python3 syntax instead of print keyword syntax.

When in Python2 traditionally you would say:

print 'something', 'other',

You say with import from __future__ import print_function

print('Something', 'other', end='')

answered May 8, 2014 at 7:39

Tony Veijalainen

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