DataFrame.keys()
DataFrame.insert(loc, column, value, allow_duplicates=False)
classmethod DataFrame.from_items(items, columns=None, orient='columns')
DataFrame.duplicated(*args, **kwargs)
DataFrame.memory_usage(index=True, deep=False)
DataFrame.dropna(axis=0, how='any', thresh=None, subset=None, inplace=False)
DataFrame.median(axis=None, skipna=None, level=None, numeric_only=None, **kwargs)
DataFrame.all(axis=None, bool_only=None, skipna=None, level=None, **kwargs)
DataFrame.reindex(index=None, columns=None, **kwargs)
DataFrame.rename(index=None, columns=None, **kwargs)
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