如何检查python代码的长度？

code = '''
def hello_world():
    print("Hello, World!")

hello_world()
'''
code_length = len(code)
print("代码长度为：", code_length)

import sys

code = '''
def hello_world():
    print("Hello, World!")

hello_world()
'''
code_length = sys.getsizeof(code)
print("代码长度为：", code_length)

import os

code = '''
def hello_world():
    print("Hello, World!")

hello_world()
'''

# 将代码保存为.py文件
with open('code.py', 'w') as file:
    file.write(code)

# 获取文件大小
file_size = os.stat('code.py').st_size
print("代码长度为：", file_size, "字节")