nsolve expected 3 arguments, got 2

Raise code

                raise TypeError('nsolve expected exactly %i guess vectors, got %i'
                                % (len(fargs), len(x0)))
    elif len(args) == 2:
        f = args[0]
        fargs = None
        x0 = args[1]
        if iterable(f):
            raise TypeError('nsolve expected 3 arguments, got 2')
    elif len(args) < 2:
        raise TypeError('nsolve expected at least 2 arguments, got %i'
                        % len(args))
    else:
        raise TypeError('nsolve expected at most 3 arguments, got %i'
                        % len(args))
    modules = kwargs.get('modules', ['mpmath'])