python exec 没有 kwargs

Question

help(exec)

给我

Help on built-in function exec in module builtins:

exec(source, globals=None, locals=None, /)
    Execute the given source in the context of globals and locals.

    The source may be a string representing one or more Python statements
    or a code object as returned by compile().
    The globals must be a dictionary and locals can be any mapping,
    defaulting to the current globals and locals.
    If only globals is given, locals defaults to it.

虽然

>>> exec("print(a)", globals={'a':1})

给我

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: exec() takes no keyword arguments

我应该如何将额外的参数传递给 python exec 函数？

Answer 1

globals() 是一个函数，它存储与程序的全局范围变量相关的所有信息。 (全局符号表)

解决您的要求的方法如下:

In [1]: a = 1
In [2]: exec("print(a)", globals())
        1

或者如果你想使用kwargs，那么它应该是一个如下的函数:

In [1]: def val_a():
...:     return 10

In [2]: exec("print(a)", {'a': val_a()})
        10