python - PyCharm: Unresolved reference -

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i using pycharm , got following red warnings in from ... import .... didn't ask me install requirement. why happening , how rid of red thing. thanks!

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does code run? if not, want install pyspark , add python environment. otherwise, if code run , want remove red inspection warning, try adding pyspark list of unresolved references want ignore in file | settings | inspections - python - unresolved references. taken reference: pycharm - resollving references


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