Pandas multi column pandas.core.indexing . indexingerror: too many indexers error

The error causes are listed in “[]”
error demonstration:

print(CNC_Production.loc[:, 'StartTime', 'EndTime', 'dataTime', 'UpdateTime'])

Correct demonstration:

print(CNC_Production.loc[:, ['StartTime', 'EndTime', 'dataTime', 'UpdateTime']])

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