disasters的博客

from datetime import datetimenow = datetime.now()print(now)print('年：{}，月：{}，日：{}'.format(now.year, now.month, now.day))diff = datetime(2019, 4, 4, 21) - datetime(2019, 1, 25, 0)print(type(diff)...

#缺失值data.isnull() //将数据转换成值为True或Null(data.isnull()).sum() //返回每一列缺失值的个数data.dropna(subset = ['yuanjia'], inplace=True) //直接在源数据中删除列为 yuanjia的缺失值#重复值data.duplicated().sum()data.drop_dupl...

基本类型，以时间戳为索引的Series -> DatetimeIndex(以datetime为索引)创建指定index为datetime的listpd.date_range()//创建import numpy as np#指定index为datetime的list1.date_list = [datetime(2017,2,18),datetime(2017,2,1...