How do I deep copy dicts in Python across multiple processes?

In Python, to deep copy dictionaries across multiple processes, you can utilize the `multiprocessing` module along with `copy` for deep copying. Since each process has its own memory space, using traditional copying methods won't suffice. Here's an example of how to do it:

import multiprocessing import copy def worker(d): # Deep copy the dictionary in the new process d_copy = copy.deepcopy(d) # Modify the copy d_copy['key'] = 'new_value' print("In process:", d_copy) if __name__ == "__main__": original_dict = {'key': 'value'} print("Original dict before processes:", original_dict) # Creating a process p = multiprocessing.Process(target=worker, args=(original_dict,)) p.start() p.join() print("Original dict after processes:", original_dict)

deep copy multiprocessing Python dictionaries processes

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