<human>:  argparse customize action.
<bot>:)))
 else:
  parser.set_defaults(**{option: value})

# Enter the option
option = "--option"

# Enter the value
value = "value"

# Calling the function
print((_customize_action(option, "option", value, argparse.ArgumentParser())))

#Example Output
# None

#Remember to inspect code for bugs.