CPT: Fix subprocess communication in Python 3
CPT: Fix subprocess communication in Python 3

karies/cling,root-mirror/cling,karies/cling,marsupial/cling,marsupial/cling,root-mirror/cling,marsupial/cling,root-mirror/cling,karies/cling,karies/cling,karies/cling,marsupial/cling,marsupial/cling,root-mirror/cling,root-mirror/cling,marsupial/cling,karies/cling,root-mirror/cling