tqdm.write() does not work well with process_map()

[nikhilweee]

Checklist

• I have marked all applicable categories:
  • exception-raising bug
  • visual output bug
  • documentation request (i.e. "X is missing from the documentation." If instead I want to ask "how to use X?" I understand StackOverflow#tqdm is more appropriate)
  • new feature request
• I have visited the source website, and in particular
  read the known issues
• I have searched through the issue tracker for duplicates
• I have mentioned version numbers, operating system and
  environment, where applicable:

  >>> import tqdm, sys
  >>> print(tqdm.__version__, sys.version, sys.platform)
  4.47.0 3.8.3 (default, Jul  2 2020, 16:21:59) 
  [GCC 7.3.0] linux

Issue

Normally when I want to display text along with a running progress bar, I would use tqdm.write() instead of print() and it all works well. However, when I use process_map(), tqdm.write() interrupts the progress bar, just like print(). It would be great if tqdm.write() works with process_map() as well.

[nikhilweee]

I guess this would be another list item in #737