tmp.py

def foo(var1=None, var2=False, var3=None, var4=None):
    # get the number of input arguments
    argcount = foo.func_code.co_argcount
    # get the names of those input arguments
    varnames = search.func_code.co_varnames[:argcount]
    # get the values of those input arguments
    # ???
    # I can programatically do it by:
    varvals = [var1, var2, var3, var4]
    # and then create a dictionary by:
    var_dict = {}
    for name, val in zip(varnames, varvals):
        var_dict[name] = val

    # but do I have to know the names of the input parameters to create
    # the list on line 9?