def load_pip_requirements(self, files_map=None, freeze=True):
        if files_map is None:
            files_map = self.default_pip_files
        for group, requirements_txt in files_map.items():
            path = Path(requirements_txt)
            if not path.exists() and group.lower() == "all" and freeze:
                cmd = envoy.run("pip freeze")
                self[group].loads(cmd.std_out)
            elif path.exists():
                self[group].load(path)
def add_handles(self, model, forward_handle, backward_handle):
        """
        Add handles to all non-container layers in the model.
        Recursively for non-container layers
        """
        handles_list = []
        model_children = list(model.children())
        if model_children:
            for child in model_children:
                handles_list.extend(self.add_handles(child, forward_handle, backward_handle))
        else:  # leaves
            handles_list.append(model.register_forward_hook(forward_handle))
            handles_list.append(model.register_backward_hook(backward_handle))
        return handles_list