File “”, line 25
parameters[‘W’+str[l]]=‘W’+str[l]
seems to be an error i the assert statement
^
Please actually show us the full error output that you got.
Note that assigning
parameters['W' + str(l)] = 'W' + str(l)
is not a useful thing to do. Why set the value of an entry in a dictionary to the key value of that entry? You want to set that entry of the parameters dictionary to the actual value of the weight matrix W^{[l]}.
Was my mistake. All fine. Sirry