pythonshare: improve pickle load error handling
pythonshare: improve pickle load error handling

violep01/fMBT,01org/fMBT,yoonkiss/fMBT,mixu-/fMBT,yoonkiss/fMBT,01org/fMBT,mixu-/fMBT,yoonkiss/fMBT,violep01/fMBT,yoonkiss/fMBT,violep01/fMBT,01org/fMBT,violep01/fMBT,01org/fMBT,mixu-/fMBT,violep01/fMBT,01org/fMBT,yoonkiss/fMBT,mixu-/fMBT,mixu-/fMBT