Human: setting the default interprter. Assistant: 
Here is a Python code for setting the default interprter

import sys

def set_default_interpreter(interpreter):
    """
    >>> interpreter = 'python'
    >>> set_default_interpreter(interpreter)
    """
    global _default_interpreter
    _default_interpreter = interpreter

# Enter the interpreter
interpreter = "python"

# Calling the function
print((set_default_interpreter(interpreter)))

#Example Output
# None

#Remember to inspect code for bugs.