python - Error while full update pip packages -

while pip update packages command

pip freeze --local | grep -v '^\-e' | cut -d = -f 1  | xargs pip install -u 

pip print error vboxapi

  downloading/unpacking vboxapi   not find downloads satisfy requirement vboxapi   externally hosted files ignored (use --allow-external vboxapi allow).   insecure , unverifiable files ignored (use --allow-unverified vboxapi allow). cleaning up... no distributions @ found vboxapi storing debug log failure in /users/rmuhamedgaliev/.pip/pip.log 

can pip ignore vboxapi while update? tried commands

pip freeze --local | grep -v '^\-e' | cut -d = -f 1  | xargs pip install -u -i pip freeze --local | grep -v '^\-e' | cut -d = -f 1  | xargs pip install -u -i --allow-external vboxapi 

yes, can ignore vboxapi package this.

grep -pv '^(?:\-e|vboxapi\=)' 

• the -p flag tells grep use perl-compatible regex.
• the -v flag says list not match regex follows.
• the regex matches lines begin -e or vboxapi=

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full example want accomplish:

pip freeze --local | grep -pv '^(?:\-e|vboxapi\=)' | cut -d = -f 1 | xargs -n1 pip install -u;