CODEWITHSUNDEEP
pythongoogle-colaboratory
Jon Deaton
Jon Deaton

Reputation: 4379

How to open an interactive Python prompt in Google Colab?

How does one open an interactive Python console/shell/prompt within Google Colab? Is it possible? An iPython prompt would be ideal but a regular prompt would suffice.

Also, it would be significantly more useful if the console's interpreter shared access to the variables/state with the Colab notebook's kernel.

Upvotes: 3

Views: 3499

Answers (2)

user5127
user5127

Reputation: 157

You can write this code in your Colab file:

import sys

twenty = 20 # Example of variable that you can access from debug function

def debug():
    sys.tracebacklimit = 0 # If error occurs, doesn't make screen look cluttered, you can always remove/comment out
    exiting = False
    while not exiting:
        command = input("Command - ")
        if command == "exit": # Make sure when you want to exit that you exit the debug function
            exiting = True
        else:
            try:
                eval(command)
            except Exception as e:
                print(f"There was an error: {str(e)}")

debug()

This asks for the command, then evaluates it. Call it with function debug and exit by typing exit.
Typing print(twenty) outputs 20 because it is defined in the Python code.

Upvotes: 0

Ami F
Ami F

Reputation: 2282

!jupyter console --existing appears to hang with no output because it is waiting to acquire the GIL in the same process as the notebook's runtime that is executing the ! magic, which isn't going to give it up until the ! is done. For the same reason I don't think it's going to be easy to get a subprocess invocation to share state with the notebook's runtime. Obvs. you could program your own input() + eval() in a loop to simulate a py prompt that shared the env with your notebook.

Upvotes: 1

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