>> import pandas >>> dict_a = { user_id :[ webbang , webbang , webbang ], book_id :[ 3713327 , 4074636 , 26873486 ], rating ..."/>
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1. 從字典創(chuàng)建DataFrame
>>> import pandas >>> dict_a = {'user_id':['webbang','webbang','webbang'],'book_id':['3713327','4074636','26873486'],'rating':['4','4','4'],'mark_date':['2017-03-07','2017-03-07','2017-03-07']} >>> df = pandas.DataFrame(dict_a) # 從字典創(chuàng)建DataFrame >>> df # 創(chuàng)建好的df列名默認(rèn)按首字母順序排序,和字典中的先后順序并不一樣,字典中是'user_id','book_id','rating','mark_date' book_id mark_date rating user_id 0 3713327 2017-03-07 4 webbang 1 4074636 2017-03-07 4 webbang 2 26873486 2017-03-07 4 webbang
2. 調(diào)整列順序
>>> df = df[['user_id','book_id','rating','mark_date']] # 調(diào)整列順序?yàn)?user_id','book_id','rating','mark_date' >>> df user_id book_id rating mark_date 0 webbang 3713327 4 2017-03-07 1 webbang 4074636 4 2017-03-07 2 webbang 26873486 4 2017-03-07
3. 調(diào)整index為從1開(kāi)始
>>> df.index = range(1,len(df) + 1) # 將index改成從1開(kāi)始 >>> df user_id book_id rating mark_date 1 webbang 3713327 4 2017-03-07 2 webbang 4074636 4 2017-03-07 3 webbang 26873486 4 2017-03-07
DataFrame操作匯總:https://www.jb51.net/article/163645.htm
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