def _set_params(self):
        """Sets the parameters with types, descriptions and default value if any"""
        # TODO: manage different in/out styles
        if self.docs['in']['params']:
            # list of parameters is like: (name, description, type)
            self.docs['out']['params'] = list(self.docs['in']['params'])
        for e in self.element['params']:
            if type(e) is tuple:
                # tuple is: (name, default)
                param = e[0]
            else:
                param = e
            found = False
            for i, p in enumerate(self.docs['out']['params']):
                if param == p[0]:
                    found = True
                    # add default value if any
                    if type(e) is tuple:
                        # param will contain: (name, desc, type, default)
                        self.docs['out']['params'][i] = (p[0], p[1], p[2], e[1])
            if not found:
                if type(e) is tuple:
                    p = (param, '', None, e[1])
                else:
                    p = (param, '', None, None)
                self.docs['out']['params'].append(p)
Sets the parameters with types, descriptions and default value if any