Fix bytes issue in wrapper.py
Fix bytes issue in wrapper.py

Bug: 90
Change-Id: I70cf5a0d1d092f0f16eff68dc59a26599488bbea

google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed