Simple colored output in python 3 using termcolor

Visually scanning long lines of output can cause the eye to lose track of the line you are interested in. Wouldn’t it be nice if you could simulate lineprinter paper? In this article, I’ll show you how with termcolor. It’s easy. Here’s a sample result:


You need to install the termcolor package:
pip3 install termcolor

Here is the the python code that generates the output:

from termcolor import colored # pip3 install termcolor
# try piping through 'less -r'

seq = map(lambda x: "{0:>2} {1}".format(str(x), "*" * x), range(50))

for i, text in enumerate(seq):
    if i % 3 == 0:
        text = colored(text, "grey", "on_green")

As you can see, it’s very simple. In the variable ‘seq’, I just generated a list of inputs, which is just some line numbers and some asterices. You would just replace it by your own list of lines. The for loop is what actually does the colouring. Every third line has its text colored.

If you want to pipe the output through ‘less’ then you will need to enable the raw control chars option, like so:

python3 | less -r

Be sure to check the link above for more details about how to use the module. Happy programming!


About mcturra2000

Computer programmer living in Scotland.
This entry was posted in Python and tagged , , . Bookmark the permalink.

1 Response to Simple colored output in python 3 using termcolor

  1. Pingback: green: a tiny util for turning every third line green | Mark Carter's blog

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