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Can someone suggest me programatically 'restart runtime'? Any programmatically restarting option is fine, python or CLI (Command Line Interface), without using GUI.
615
It's already possible to run terminal commands in a Colab notebook — all you need to do is prepend an exclamation to the command, or use the %%shell command, but sometimes you might prefer the convenience an interactive shell.
To clear outputs, go to 'EDIT' and 'clear all outputs'. If you want to reset all packages, data files etc. installed, you have got to the runtime as you mentioned.
To run the code in any cell, you can click the run button on the left side of the code cell (looks like a “play” button with a triangle in a circle) or you can click [shift] + [enter]. The output will appear right below the code cell.
Run a cell with the following code snippet:
import os
os.kill(os.getpid(), 9)
That will kill the current Python runtime process, which will be automatically restarted by the manager.
92
To add to Bob's answer - once you kill yourself, there's no going back. So you won't be able to programmatically resume the execution after the self-destruct call.
But you can make it work without changing code - i.e. there's a limited number of reasons to restart (e.g. installing modules, especially if they were imported, switching Tensorflow versions etc.), and in your final run of the notebook, they shouldn't be necessary.
Here's a complete example of installing Detectron2 on top of a notebook about object detection:
%%time
# deps installation
try:
import detectron2
except ImportError:
!git clone https://github.com/facebookresearch/detectron2 detectron2_repo
!pip install -e detectron2_repo
print('Stopping RUNTIME! Please run again.')
import os
os.kill(os.getpid(), 9)
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