The following code demonstrates the situation for function definition pickling:
import pickle
def f1():
print('Hello from the jar!')
with open('function.pckl', 'wb') as file_out:
pickle.dump(f1, file_out)
We see no errors, so we might conclude that f1() was pickled successfully, and now we can retrieve it from the file.
Run the code in the editor and see what happens.
Unfortunately, the result proves that no code was persisted:
Traceback (most recent call last):
File "main.py", line 4, in <module>
data = pickle.load(file_in)
AttributeError: Can't get attribute 'f1' on <module '__main__' from 'main.py'>
output