PyCharm logging output colours

Question

I\'m using PyCharm to develop a GAE app in Mac OS X. Is there any way to display colours in the run console of PyCharm?

I\'ve set a handler to output colours in ansi

Answer 1

I discovered the following solution. Apparently Pycharm redirects sys.stdout. From the sys module documentation:

sys.__stdin__
sys.__stdout__
sys.__stderr__

These objects contain the original values of stdin, stderr and stdout at the start of the program. They are used during finalization, and could be useful to print to the actual standard stream no matter if the sys.std* object has been redirected.

It can also be used to restore the actual files to known working file objects in case they have been overwritten with a broken object. However, the preferred way to do this is to explicitly save the previous stream before replacing it, and restore the saved object.

Therefore, to solve this issue you can redirect output to sys.__stdout__. Example configuration from my log_config.yml:

console:
  class: logging.StreamHandler
  level: DEBUG
  stream: "ext://sys.__stdout__"
  formatter: colorFormatter

Answer 2

Late to the party, but anyone else with this issue, here's the solution that worked for me:

import logging
import sys
logging.basicConfig(stream=sys.stdout, level=logging.DEBUG)

This came from this answer

Answer 3

PyCharm doesn't support that feature natively, however you can download the Grep Console plugin and set the colors as you like.

Here's a screenshot: http://plugins.jetbrains.com/files/7125/screenshot_14104.png (link is dead)

I hope it helps somewhat :) although it doesn't provide fully colorized console, but it's a step towards it.

Answer 4

As of at least PyCharm 2017.2 you can do this by enabling:

Run | Edit Configurations... | Configuration | Emulate terminal in output console

Answer 5

PyCharm 2019.1.1 (Windows 10, 1709) - runned snippet as is - works correctly.

Bug: setFormatter - does not work.

Fix: make change in line 67 and get rid on line 70-71 (unformatted handler adding).

self.stream.write(record.msg + "\n", color)

to

self.stream.write(self.format(record) + "\n", color)

Line 70-71 can be moved under manual file run construction for save test ability:

if __name__ == "__main__":
    logging.getLogger().setLevel(logging.DEBUG)
    logging.getLogger().addHandler(ColorHandler())

    logging.debug("Some debugging output")
    logging.info("Some info output")
    logging.error("Some error output")
    logging.warning("Some warning output")

Compared it with standard StreamHandler:

import logging
import logging_colored

log_format = logging.Formatter("[%(threadName)-15.15s] [%(levelname)-5.5s]  %(message)s")
logger = logging.getLogger('Main')
logger.setLevel(logging.DEBUG)

console = logging.StreamHandler()
console.setFormatter(log_format)
logger.addHandler(console)

console = logging_colored.ColorHandler()
console.setFormatter(log_format)
logger.addHandler(console)
...

Answer 6

Sept. 2019: PyCharm Community 2019.1

PyCharm colored all the logs including info/debug in red.

Th upshot is: it is not a PyCharm problem, this is how the default logging is configured. Everything written to sys.stderr is colored red by PyCharm. When using StreamHandler() without arguments, the default stream is sys.stderr.

For getting non-colored logs back, specify logging.StreamHandler(stream=sys.stdout) in basic config like this:

logging.basicConfig(
    level=logging.DEBUG,
    format='[%(levelname)8s]:  %(message)s',
    handlers=[
        logging.FileHandler(f'{os.path.basename(__file__)}.log'),
        logging.StreamHandler(sys.stdout),
    ])

or be more verbose:

logging.getLogger().addHandler(logging.StreamHandler(stream=sys.stdout))

This fixed my red PyCharm logs.