Calling different functions by same name, having same action

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I was wondering about ways to add new lines to already running code (it could even be a simple while loop) and run it. But this way of creating and importing a class or functions always runs the first added lines of code even if you have changed the function and imported it again. I tried adding del main, and replacing the line data = main(data) with data = main(data).copy(), but both haven't given any result. Any error or log does not occur, I added info in the steps for understanding.

CODES:

def applyCommand(data, command):
    with open('/$PATH/simple_macro.py', 'w') as file:
        file.write(command)
        print('[INFO] simple macro has been written- step 1 ✓.')

    from simple_macro import main
    print('[INFO] simple macro has been imported - step 2 ✓.')
    
    data = main(data)
    print('[INFO] data has been updated - step 3 ✓.')

    from os import remove
    remove('/$PATH/simple_macro.py')
    print('[INFO] simple macro file has been deleted - step 4 ✓.')
   
    return data

data = list(range(10))

command = "def main(data):\n    return data[:5]"
data = applyCommand(data, command)
print("Updated data:", data)

commandTwo = "def main(data):\n    return data[0]"
data = applyCommand(data, commandTwo)
print("Updated data:", data)

OUTPUT:

[INFO] simple macro has been written- step 1 ✓.
[INFO] simple macro has been imported - step 2 ✓.
[INFO] data has been updated - step 3 ✓.
[INFO] simple macro file has been deleted - step 4 ✓.
Updated data: [0, 1, 2, 3, 4]
[INFO] simple macro has been written- step 1 ✓.
[INFO] simple macro has been imported - step 2 ✓.
[INFO] data has been updated - step 3 ✓.
[INFO] simple macro file has been deleted - step 4 ✓.
Updated data: [0, 1, 2, 3, 4]

The first part produces the correct expected output, but the second one's expected output is just 0 but the actual output is [0, 1, 2, 3, 4] as you see. So the question is what type of addition or change can be done to that code cells to get expected output after the first call?

import function class python
1 Answers

Running, importing and changing the same function and program in a single run, will leave the original created main() in the memory of your computer. In order to properly refresh the import, you need to use reload() from the importlib module:

from importlib import reload
import os
def applyCommand(data, command):
    with open('simple_macro.py', 'w') as file:
        file.write(command)
        print('[INFO] simple macro has been written- step 1 ✓.')

    import simple_macro
    reload(simple_macro)
    with open('simple_macro.py') as file:
        print(file.read())
    print('[INFO] simple macro has been imported - step 2 ✓.')
    
    data = simple_macro.main(data)
    print('[INFO] data has been updated - step 3 ✓.')
    
    os.remove('simple_macro.py')
    print('[INFO] simple macro file has been deleted - step 4 ✓.')
   
    return data

data = list(range(10))

command = "def main(data):\n    return data[:5]"
data = applyCommand(data, command)
print("Updated data:", data)

commandTwo = "def main(data):\n    return data[0]"
data = applyCommand(data, commandTwo)
print("Updated data:", data)

Results:

[INFO] simple macro has been written- step 1 ✓.
def main(data):
    return data[:5]
[INFO] simple macro has been imported - step 2 ✓.
[INFO] data has been updated - step 3 ✓.
[INFO] simple macro file has been deleted - step 4 ✓.
Updated data: [0, 1, 2, 3, 4]
[INFO] simple macro has been written- step 1 ✓.
def main(data):
    return data[0]
[INFO] simple macro has been imported - step 2 ✓.
[INFO] data has been updated - step 3 ✓.
[INFO] simple macro file has been deleted - step 4 ✓.
Updated data: 0

I added a print of the actual change made to simple_macro.

user_113559260
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