Update common_errors_python.md
Update common_errors_python.md
ucsb-sbhs-cs/ucsb-sbhs-cs.github.io,ucsb-sbhs-cs/ucsb-sbhs-cs.github.io,ucsb-sbhs-cs/ucsb-sbhs-cs.github.io,ucsb-sbhs-cs/ucsb-sbhs-cs.github.io