Question

the , in print added a white space

>>> print "a","b"
a b

If I need a \t, I put

>>> print "a","\t","b"
a       b

How I can change the output of , to a \t?

Answer 1

You can import the print() function from __future__ and use sep='\t', print() function was introduced in python 3, and it replaced the print statement used in python 2.x:

In [1]: from __future__ import print_function

In [2]: print('a','b',sep='\t')
a   b

help on print():

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.