Interpret python code and update the caller's locals

interpret.py

import inspect


def interpret(src):
    """Compile and execute provided code as if it was local to the caller"""
    # get a decent name
    try:
        name = __file__
    except NameError:
        name = __name__

    # attemt to access callers frame
    frame = inspect.currentframe()
    if frame.f_back:
        frame = frame.f_back

    # get the locals
    _locals = frame.f_locals

    # compile and execute
    code = compile(src, name, "exec")
    exec(code, globals(), _locals)


src = """
def a(x,y):
    return x*y
"""

interpret(src)
print(a, a(3, 4))