parameters: (optimizer, grads, vars_, global_step=None)
docstring: Functional style apply_grads for `tfe.defun`.
docstring_summary: Functional style apply_grads for `tfe.defun`.
docstring_tokens: Functional style apply_grads for tfe . defun .
function: def apply_gradients(optimizer, grads, vars_, global_step=None):
    """Functional style apply_grads for `tfe.defun`."""
    optimizer.apply_gradients(zip(grads, vars_), global_step=global_step)
function_tokens: def apply_gradients ( optimizer , grads , vars_ , global_step = None ) : optimizer . apply_gradients ( zip ( grads , vars_ ) , global_step = global_step )