Python 自省(introspection) - 如何从函数内部检查当前模块/调用行

Question

我有一个函数:

# utils.py
def hello(name='World'):
    # Detect where I'm being called from.
    print('Hi, %s. You called this from %s at line # %d.' % (name, mod, lineno))
    # ``mod`` and ``lineno`` on previous line would have been set in real use.

我导入该函数并在别处运行它

# other.py (this comment at line # 138)
from utils import hello
hello('Johnny')  # From inside ``hello`` I want to be able to detect that this
# was called from other.py at line # 140

Answer 1

访问inspect.currentframe()的封闭框架:

import inspect

def hello(name='World'):
    f = inspect.currentframe().f_back
    mod = f.f_code.co_filename
    lineno = f.f_lineno
    print('Hi, %s. You called this from %s at line # %d.' %
          (name, mod, lineno))