AttributeError: 'Adam' object has no attribute 'zero_grads'

Im using a code not writing by me. So when executing this code we get error about the inexistance of zero_grads()

optimizer.zero_grads()
AttributeError: 'Adam' object has no attribute 'zero_grads'

This code is:

import chainer.optimizers as O optimizer = O.Adam() optimizer.setup(model) clip = chainer.optimizer.GradientClipping(5.0) optimizer.add_hook(clip) …

optimizer.zero_grads() Does i should change: optimizer.zero_grads() to

optimizer.use_cleargrads(use=True)? Note that im using chainer 4.0 version and the code what building with chainer 1.5.

[abhayraw1]

I guess instead of passing True for use argument you’ll have to pass False:

optimizer.use_cleargrads(use=False) you can have a look at the function definition here which resides in the base class of Adam

Hope it helps.

[yazidhadni]

For those like me that had the same issue and have landed here : there is no zero_grads(), you should write zero_grad() instead.