# Requires: pip install tensorflow==2.0.0 tensorflow-transform==0.15.0
import io
import threading
import pickle

encoded = b''
bytes_io = io.BytesIO(encoded)
unpickler = pickle.Unpickler(bytes_io)

def find_class(module_name, class_name):
    return unpickler.find_class(module_name, class_name)

def t1():
    return find_class("tensorflow_transform.beam.analyzer_impls", "_PackedCombinerWrapper")

def t2():
    return find_class("tensorflow_transform.tf_metadata.metadata_io", "write_metadata")

threads = []
threads.append(threading.Thread(target=t1))
threads.append(threading.Thread(target=t2))

for thread in threads:
    thread.start()