统一最后刷题日期的格式

Python 3 解法, 执行用时: 794ms, 内存消耗: 524288KB, 提交时间: 2022-07-25

import pandas as pd
Nowcoder = pd.read_csv('Nowcoder.csv',sep=',',dtype=object)
Nowcoder['Last_submission_time'] = pd.to_datetime(Nowcoder["Last_submission_time"],format="%Y-%m-%d")
print(Nowcoder[['Nowcoder_ID','Level','Last_submission_time']])

Python 3 解法, 执行用时: 801ms, 内存消耗: 524288KB, 提交时间: 2022-07-21

import pandas as pd

Nowcoder = pd.read_csv('Nowcoder.csv',sep=',', dtype=object)
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)

Nowcoder['Last_submission_time'] = pd.to_datetime(Nowcoder['Last_submission_time']).\
 dt.strftime('%Y-%m-%d')
print(Nowcoder[['Nowcoder_ID','Level','Last_submission_time']])

Python 3 解法, 执行用时: 804ms, 内存消耗: 524288KB, 提交时间: 2022-07-24

import pandas as pd
Nowcoder = pd.read_csv('Nowcoder.csv',sep = ',',dtype = object)
Nowcoder['Last_submission_time'] = pd.to_datetime(Nowcoder['Last_submission_time'],
                                             format = '%Y-%m-%d')
print(Nowcoder[['Nowcoder_ID','Level','Last_submission_time']])

Python 3 解法, 执行用时: 806ms, 内存消耗: 524288KB, 提交时间: 2022-07-21

import pandas as pd
Nowcoder = pd.read_csv('Nowcoder.csv',sep=',',dtype=object)
Nowcoder['Last_submission_time']=pd.to_datetime(Nowcoder['Last_submission_time'],format='%Y-%m-%d')
print(Nowcoder[['Nowcoder_ID','Level','Last_submission_time']])

Python 3 解法, 执行用时: 809ms, 内存消耗: 524288KB, 提交时间: 2022-08-03

import pandas as pd

df = pd.read_csv('Nowcoder.csv', sep=',', dtype=object)

df['Last_submission_time'] = pd.to_datetime(df.Last_submission_time)
df['Last_submission_time'] = df['Last_submission_time'].dt.strftime('%Y-%m-%d')

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

详情

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输出描述：