pandas 基础

pandas 是一个开源的数据分析和数据操作库，这里记录下 pandas 常用的基础操作

1. 创建 DataFrame

      In [14]: df = pd.DataFrame({ 
       ...:     'item_name':['cup','pants','shoes','coat','sunglasses'],   
       ...:         'brand': ['Yum Yum', 'Yum Yum', 'Indomie', 'Indomie', 'Indomie'], 
       ...:             'style': ['cup', 'cup', 'cup', 'pack', 'pack'], 
       ...:                 'rating': [4, 4, 3.5, 15, 5], 
       ...:                     'price': [12,34.3,78.1,61,91], 
       ...:                     })                             
       In [15]: df                                                                                        
       Out[15]: 
       item_name    brand style  rating  price
       0         cup  Yum Yum   cup     4.0   12.0
       1       pants  Yum Yum   cup     4.0   34.3
       2       shoes  Indomie   cup     3.5   78.1
       3        coat  Indomie  pack    15.0   61.0
       4  sunglasses  Indomie  pack     5.0   91.0
   
   In [16]:

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