How to solve the old tensorflow problems

Question

The code is done with tensorflow (old version) and should stay like this because it is too big to manipulate

import re


all_variables = tf.**contrib**.estimator.framework.get_variables('DehazeNet')
variables_to_be_trained = tf.contrib.framework.get_variables('DehazeNet/final')
pre_trained_variables = [x for x in all_variables if re.match(r'DehazeNet/final.*', x.name) == None]
print(len(variables_to_be_trained))
print(len(pre_trained_variables))
print(all_variables)

print(len(tf.compat.v1.trainable_variables()))```

Error:
AttributeError: module 'tensorflow' has no attribute '**contrib**'

any suggestion please