Command line utility to colorize other commands output

pip install colorize==1.1.0



Give some color to your (remote) TTY!!

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And it is free. Checkout the Source code.

Installation and Usage

Two options: to install it in your system/project:

pip install colorize

And you can use it with:

python -m colorize -h

Now, you have two ways to use it:

Rendering the output

Just execute:

$ command to execute | python -m colorize

If you need to render both the stdout and the stderr:

$ command to execute |& python -m colorize

This method works well with too long outputs

As runner

Other way to use it:

$ python -m colorize command to execute

This method can do disgusting things with too long outputs.


You can change the output format with the argument -f or --format. It uses the same format that logging, so you can use any of its special variables, like:

You can combine them as you wish. Example:

$ python -m colorize -- echo foo
$ python -m colorize -f "%(asctime)s - %(levelname).2s: %(message)s" -- echo foo
05-29 08:43:09 - IN: foo
$ python -m colorize -f "%(levelname).2s %(asctime)s - %(message)s" -- echo foo
IN 05-29 08:44:17 - foo

Default date format is %m-%d %H:%M:%S, but you can change it with --date-format:

$ python -m colorize -f "%(asctime)s" --date-format="%H:%M:%S" -- echo foo
$ python -m colorize -f "%(asctime)s" --date-format="%H %M %S" -- echo foo
08 44 17

Configuration File

It will find a configuration file in the current directory, in the home directory or in the default path directory. The first one found will be used. So, it will search for:

  • ./.colorize.conf
  • $HOME/.configuration/colorize/colorize.conf
  • /etc/colorize/colorize.conf

The format for this file is very easy: it is a CSV file with next fields:

# regular expression to highlight (quoted) , bold output , foreground color , background color
  "^=+$"                                   , 1           , white            ,
  "^=+$"                                   , true        , white            , black
  "^=+$"                                   , 0           , red              , white
  "^=+$"                                   , false       , brown            , magenta

For example, you can configure it to colorize the go test output:

"^PASS", 1, white, green
"^ok", 1, white, green
"^FAIL", 1, white, red
"^--- FAIL:", 1, white, red

Available colors:

  • black
  • white
  • red
  • green
  • blue
  • brown
  • gray
  • magenta
  • cyan

And that's all.

Example to simulate colordiff

To emulate colordiff, just use this configuration file:

"^>.*",                0, blue
"^<.*",                0, red
"^\d+,?\d*c\d+,?\d*$", 0, magenta

That's enough :D