所以我有兩個簡單的 Python 模塊：test1.py：def main():    def fmt(*args):        r = ""        for x in args:            r += eval("f'"+x+"'")        return r    a = "alpha"    b = "beta"    d = "delta"    msg = "Hello xr8t8au one, this is {a} "    print(msg)    print(fmt(msg))if __name__ == "__main__":    main()和 test2.py：def fmt(*args):    r = ""    for x in args:        r += eval("f'"+x+"'")    return ra = "alpha"b = "beta"d = "delta"msg = "Hello wczradr one, this is {a} "print(msg)print(fmt(msg))所以，基本上是相同的，除了第一個將代碼包裝在一個函數中，而第二個沒有。第一個在執行時給出以下輸出：Hello aj82k7s one, this is {a} Traceback (most recent call last):  File "test1.py", line 16, in <module>    main()  File "test1.py", line 13, in main    print(fmt(msg))  File "test1.py", line 6, in fmt    r += eval("f'"+x+"'")  File "<string>", line 1, in <module>NameError: name 'd' is not defined第二個如我所料：Hello 2l35b6b one, this is {a} Hello delta one, this is alpha beta所以第一個認為它不知道這個d名字。但是，如果我print(dir(d))在語句之后立即插入 test1.py def fmt(*args):，現在它會找到d，然后不知道下一個名稱a：Hello nxa5voo one, this is {a} Traceback (most recent call last):  File "test1.py", line 17, in <module>    main()  File "test1.py", line 14, in main    print(fmt(msg))  File "test1.py", line 7, in fmt    r += eval("f'"+x+"'")  File "<string>", line 1, in <module>NameError: name 'a' is not defined我敢肯定有人知道發生了什么，但我很茫然。