题解 | #统一最后刷题日期的格式#

import pandas as pd

pd.set_option('display.width', 300)  # 设置字符显示宽度
pd.set_option('display.max_rows', None)  # 设置显示最大行
pd.set_option('display.max_columns', None)
df = pd.read_csv('Nowcoder.csv', sep=',',dtype='object')

df['Last_submission_time'] = pd.to_datetime(df['Last_submission_time'], format=("%Y-%m-%d"))

person_list = ['Nowcoder_ID','Level','Last_submission_time']
print(df[person_list])

# print(df.loc[:,['Nowcoder_ID','Level','Last_submission_time']])