在python 2和3中的第一行打印在同一行

Question

There are several solutions for printing on same line and at the first of it, like below.

In python 2,

print "\r Running... xxx",

And in Python 3,

print("\r Running... xxx", end="")

I can't find a single print solution to cover python 2 and 3 at the same time. Do I have to use sys.stdout.write ?

Answer 1

Use from __future__ import print_function and use the print() function in both Python 2 and Python 3:

from __future__ import print_function

print("\r Running... xxx", end="")  # works across both major versions

See the print() function documentation in Python 2 :

Note : This function is not normally available as a built-in since the name print is recognized as the print statement. To disable the statement and use the print() function, use this future statement at the top of your module:

 from __future__ import print_function 

The print() function was added to Python 2.6.

Answer 2

Use

from __future__ import print_function

in Python 2 and use print as a function in Python 2 also

print("\r Running... xxx", end="")