Can you translate this debugging macro from C++ to python?

Question

I use this very helpful macro when developing in C++:

#define DD(a) std::cout << #a \" = [ \" << a << \" ]\" << std::endl;std::cout.f         


        

Answer 1

You could inspect the stack trace and "parse" it. Since you know the name of your function (dd in this case) it becomes fairly easy to find the call and extract the name of the variable.

    import inspect
    import re

    def dd(value):
        calling_frame_record = inspect.stack()[1]
        frame = inspect.getframeinfo(calling_frame_record[0])
        m = re.search( "dd\((.+)\)", frame.code_context[0])
        if m:
            print "{0} = {1}".format(m.group(1), value)

    def test():
        a = 4
        dd(a)

    test()

Output

a = 4