Pandad Set Timestamp Column as Index

import pandas as pd items = [  {'date': '2020-01-01', 'score': 1},  {'date': '2020-01-01', 'score': 2},  {'date': '2020-01-01', 'score': 3}]df = pd.DataFrame(items) df['date'] = pd.to_datetime(df['date'], format='%Y-%m-%d')df.set_index('date', inplace=True)

            score
date             
2020-01-01      1
2020-01-01      2
2020-01-01      3