print colorful string out to console with python

Question

Is there a way to print string in colorful way with python?

For example, can I print some part of string red or something to a console? I use Mac OS X.

print? Do you mean print to a Linux console? Or print to a Windows console? Or display in an HTML page? What do you mean? — S.Lott
– S.Lott, Commented Sep 12, 2010 at 20:22

unutbu · Accepted Answer · 2011-09-01 12:51:11Z

8

This works for linux consoles that support color:

CODE={
    'ENDC':0,  # RESET COLOR
    'BOLD':1,
    'UNDERLINE':4,
    'BLINK':5,
    'INVERT':7,
    'CONCEALD':8,
    'STRIKE':9,
    'GREY30':90,
    'GREY40':2,
    'GREY65':37,
    'GREY70':97,
    'GREY20_BG':40,
    'GREY33_BG':100,
    'GREY80_BG':47,
    'GREY93_BG':107,
    'DARK_RED':31,
    'RED':91,
    'RED_BG':41,
    'LIGHT_RED_BG':101,
    'DARK_YELLOW':33,
    'YELLOW':93,
    'YELLOW_BG':43,
    'LIGHT_YELLOW_BG':103,
    'DARK_BLUE':34,
    'BLUE':94,
    'BLUE_BG':44,
    'LIGHT_BLUE_BG':104,
    'DARK_MAGENTA':35,
    'PURPLE':95,
    'MAGENTA_BG':45,
    'LIGHT_PURPLE_BG':105,
    'DARK_CYAN':36,
    'AUQA':96,
    'CYAN_BG':46,
    'LIGHT_AUQA_BG':106,
    'DARK_GREEN':32,
    'GREEN':92,
    'GREEN_BG':42,
    'LIGHT_GREEN_BG':102,
    'BLACK':30,
}

def termcode(num):
    return '\033[%sm'%num

def colorstr(astr,color):
    return termcode(CODE[color])+astr+termcode(CODE['ENDC'])

if __name__=='__main__':
    astr='yippy skippy'
    # for num in range(300):
    #     color=termcode(num)
    #     print('%s: %s'%(num,color+astr+termcode(CODE['ENDC'])))
    for key in sorted(CODE.keys()):
        print('%s: %s'%(key,colorstr(astr,key)))

    print(colorstr('Red','RED'))

Here is an example of using colorstr to make a colorized logger:

import logging
import copy

logger=logging.getLogger(__name__)

class ColoredFormatter(logging.Formatter):
    # A variant of code found at http://stackoverflow.com/questions/384076/how-can-i-make-the-python-logging-output-to-be-colored
    LEVELCOLOR = {
        'DEBUG': 'BLUE',
        'INFO': 'BLACK',
        'WARNING': 'PURPLE',
        'ERROR': 'RED',
        'CRITICAL': 'RED_BG',
        }

    def __init__(self, msg):
        logging.Formatter.__init__(self, msg)

    def format(self, record):
        record = copy.copy(record)
        levelname = record.levelname
        if levelname in self.LEVELCOLOR:
            record.levelname = colorstr(levelname,self.LEVELCOLOR[levelname])
            record.name = colorstr(record.name,'BOLD')
            record.msg = colorstr(record.msg,self.LEVELCOLOR[levelname])
        return logging.Formatter.format(self, record)

if __name__=='__main__':
    logger.setLevel(logging.DEBUG)
    console = logging.StreamHandler()
    console.setFormatter(
        ColoredFormatter('%(name)s: %(message)s (%(filename)s:%(lineno)d)'))
    logger.addHandler(console)
    fh = logging.FileHandler('/tmp/test.log','w')
    fh.setFormatter(logging.Formatter('%(name)s: %(message)s'))
    logger.addHandler(fh)

    logger.debug('debug')
    logger.info('info')
    logger.warning('Warning')
    logger.error('ERROR')
    logger.critical('CRITICAL!!!')

This example logs to both the console (stderr) and a file (/tmp/test.log). The message to the console is colorized, but the output to the file is left plain.

edited Sep 1, 2011 at 12:51

answered Sep 12, 2010 at 20:20

unutbu

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5 Comments

neydroydrec Over a year ago

Excellent: I would have chosen your solution. Thanks.

neydroydrec Over a year ago

PS: I both print to console and log to file. On file, the colour tags show up, is there a way to remove them when writing to file by converting the string to some other format?

unutbu Over a year ago

@Benjamin: Are you using the logging module, or issuing separate print statements (one to the console, one to the file) ?

neydroydrec Over a year ago

I made my own logger module using a print statement on screen and a file.write() statement to file. I didn't know a logging module existed.

unutbu Over a year ago

@Benjamin: I'd recommend switching to the logging module from the standard library. Above, I've posted a little example of how one might log colorized messages to the console, while logging plain messages to a file.

leoluk · Accepted Answer · 2010-09-12 20:16:44Z

8

You could use colorama, but use it sparingly.

answered Sep 12, 2010 at 20:16

leoluk

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1 Comment

Muhammad Alkarouri Over a year ago

+1. First time I heard of it, and it works on Windows! I expected it to work on Linux and OS X, but that was a pleasant surprise.

joaquin · Accepted Answer · 2010-09-12 22:59:22Z

2

Other alternatives are:

colorconsole that is claim to work on OSX
urwid also works on OSX
curses on the library but only for linux afaik
win curses this works on win
console

I have played with them in windows. Dont know how they behave in OSX.

edited Sep 12, 2010 at 22:59

answered Sep 12, 2010 at 22:52

joaquin

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Comments

sorin · Accepted Answer · 2012-12-04 10:08:01Z

1

If you want to do this with minimal effort you could use the tendo.colorer library.

Just by importing it it will color you logging on all platforms, without breaking the redirected log.

Also you could use it to display custom colored messages if you want, as it contains a cross platform ANSI library and a helper for it.

answered Dec 4, 2012 at 10:08

sorin

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