python - Payment method token is invalid when I create subscription in Braintree -

i want create subscription using braintree using python , js. error:

'errors': <braintree.errors.errors object @ 0xb0d157cc>, 'transaction': none, 'subscription': none, 'message': 'payment method token invalid.', 'credit_card_verification': none, 'merchant_account': none 

the way how create token , subscription

    token = braintree.clienttoken.generate({         "customer_id": self.braintree_customer.id     })      create_subscriptions = braintree.subscription.create({         "payment_method_token": token,         "plan_id": self.plan_id     }) 

the subscription needs payment method token, not client token:

https://developers.braintreepayments.com/javascript+php/reference/request/client-token/generate

https://developers.braintreepayments.com/javascript+php/reference/request/subscription/create#payment_method_token