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Printing with Python

Updated on February 3, 2020
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Jen is a DevOps and Cloud Professional, currently working on expanding her programming skills!

The Python Print Function

Printing is a key concept in all programming languages. You need to be able to print in order to return data to the screen or to output it to a file. Python has a print function, which has a lot of functionality which we will go through here.

One thing to keep in mind is that print works differently in different versions of Python. More on this shortly.

The print function works differently in python 3 than it did in python 2. To print in python 2.x you simply used print followed by the statement. For example:

$ print 100

This would have returned '100' to the screen. However, if you were to run that in Python 3 you would receive an error along the following lines:

$ python3
Python 3.2.3 (default, Apr 10 2013, 05:03:36)
[GCC 4.7.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> print 100
File "", line 1

This is because in Python 3 you need to use parentheses with the print function.

$ print(100)

This difference is a common reason why python 2 programs don't run successfully in the python 3 interpreter - though as you can see, this particular issue is easily fixed!

Print()

The print function has a number of arguments:

print(value1, ..., sep=' ', end='\n', file=sys.stdout, flush=False)

The print function can:

  • The print function can print an arbitrary number of values ("1, v2, ..."), which are separated by commas.
  • By default a print call is ended by a newline, though it's possible to do a print without a new line.
  • The output of the print function is send to the std output stream (sys.stdout) by default.
  • It's possible to change the seperator between values by assigning an arbitrary string to the keyword parameter "sep"

Python print() Examples

# printing a string:
print('Please wait...')

# printing a variable:
message = 'Please wait...'
 print(message)

# print with a blank separator
print('hello', 'world', sep=' ')
hello world

Thanks for reading! Hopefully this has given a little bit of an introduction to the python print function. Look out for some more advanced articles soon!

© 2020 Jen

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