CODEWITHSUNDEEP
pythonpython-2.7iogevent
user2547584
user2547584

Reputation: 41

Non-blocking raw_input with line editing using gevent

I'm trying to implement an interactive shell over an internal API which uses gevent. I want the background greenlets to continue running while waiting on user input, and I also want readline command-line functionality (history, line editing, etc.)

My problem seems to be that raw_input is blocking. There are solutions around which replace raw_input with things like:

def raw_input(prompt):
  sys.stdout.write(prompt)
  sys.stdout.flush()

  select.select([sys.stdin], [], [])
  return sys.stdin.readline().rstrip('\n')

This solves the blocking problem; the background greenlets now run fine. But I lose the interactive line-editing functionality.

Any suggestions or workarounds?

Upvotes: 4

Views: 694

Answers (1)

Vogon Jeltz
Vogon Jeltz

Reputation: 1315

You could try using raw_input in a seprecate thread and then returning the result to a global variable. Not sure if this would work for you, it worked for me but in an entirely different scenario

Upvotes: 2

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