data = pd.read_csv('/kaggle/input/covidtracking/all-states-history.csv', index_col=0, parse_dates=True)
data.shape
/opt/conda/lib/python3.7/site-packages/IPython/core/interactiveshell.py:3063:
DtypeWarning: Columns (2) have mixed types.
Specify dtype option on import or set low_memory=False.
interactivity=interactivity, compiler=compiler, result=result)
(16931, 41)
Column (2) has quality rating elements with values such as A, A+, B, B+ etc
In the CSV file the data type listed above each column is "standard".
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