Fix KeyError in pfc config command #3563
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What I did
Used
getenvto returnNoneif the env variable is missing instead of key error. Fixes sonic-net/sonic-buildimage#20398How I did it
Same as above
How to verify it
Run the
pfc config asymmetric on EthernetXcommand on a T2 topology linecardPrevious command output (if the output of a command-line utility has changed)
KeyError: 'UTILITIES_UNIT_TESTING'New command output (if the output of a command-line utility has changed)
No output (as expected). Config commands change attributes as expected