如何在Python中同步函数调用的时间戳？

import datetime

def get_timestamp():
    now = datetime.datetime.now()
    timestamp = now.strftime('%Y-%m-%d %H:%M:%S.%f')
    return timestamp

def my_function():
    timestamp = get_timestamp()
    print("Function called at:", timestamp)

import datetime

def get_timestamp():
    now = datetime.datetime.now()
    timestamp = now.strftime('%Y-%m-%d %H:%M:%S.%f')
    return timestamp

def my_function():
    timestamp = get_timestamp()
    print("Function called at:", timestamp)

my_function()

Function called at: 2022-01-01 12:00:00.000000