每日总结

Pandas 数据清洗

Pandas 清洗空值:DataFrame.dropna(axis=0, how='any', thresh=None, subset=None, inplace=False)

例子:import pandas as pd

df = pd.read_csv('property-data.csv')

new_df = df.dropna()

print(new_df.to_string())

Pandas 清洗格式错误数据:

例子:

import pandas as pd

# 第三个日期格式错误
data = {
  "Date": ['2020/12/01', '2020/12/02' , '20201226'],
  "duration": [50, 40, 45]
}

df = pd.DataFrame(data, index = ["day1", "day2", "day3"])

df['Date'] = pd.to_datetime(df['Date'])

print(df.to_string())

Pandas 清洗重复数据:使用 duplicated()drop_duplicates() 方法

 

posted @ 2021-10-04 16:30  chenghaixinag  阅读(86)  评论(0编辑  收藏  举报