scan inside scan.py

import theano
from theano import tensor as T

trng = T.shared_randomstreams.RandomStreams(1234)

inner_upd = None
def OneStep(vsample) :
    
    def inner(vsample):
        return vsample + trng.normal(size=vsample.shape)
    
    global inner_upd
    vsample,inner_upd = theano.scan(inner,outputs_info=vsample,n_steps=5)
    
    return vsample + trng.normal(size=vsample.shape)

sample = theano.tensor.vector()

values, updates = theano.scan(OneStep, outputs_info=sample, n_steps=10)

fun = theano.function([sample], values[-1], 
                      #no_default_updates=True #wontwork
                      #updates = updates+inner_upd #wontwork
                      #updates = updates #wontwork
                                         )