python - 连接两个 pandas 数据透视表

Question

考虑两个相似的 pandas 数据透视表，如何将这两个表连接到它们的索引上，例如国家。例如:

df1.pivot_table(index='country', columns='year', values=['rep','sales'], aggfunc='first')

          rep                       sales                  
year     2013  2014    2015  2016   2013  2014  2015  2016
country                                                  
fr       None  kyle  claire  None   None   10    20    None
uk       kyle  None    None  john    12   None  None   10
usa      None  None    None  john   None  None  None   21


df2.pivot_table(index='country', columns='year', values=['rep','sales'], aggfunc='first')

          rep                          sales                  
year     2013  2014    2015   2016     2013   2014  2015  2016
country                                                  
fr       120   marc   debbie  None     None    0    56   None
uk       marc  None    100    peter    45    None   65    10
ca       89    None    None   peter    None   33   None   78

Answer 1

How to join these tables

含糊不清。连接这些表的方法有很多种。

设置

idx = pd.Index(['fr', 'uk', 'usa'], name='country')
col = pd.MultiIndex.from_product([['rep', 'sales'], range(2013, 2017)],
                                 names=[None, 'year'])

p1 = pd.DataFrame([
        [None, 'kyle', 'claire', None, None, 10, 20, None],
        ['kyle', None, None, 'john', 12, None, None, 10],
        [None, None, None, 'john', None, None, None, 21]
    ], idx, col, object)

p2 = pd.DataFrame([
        [120, 'marc', 'debbie', None, None, 0, 56, None],
        ['marc', None, 100, 'peter', 45, None, 65, 10],
        [89, None, None, 'peter', None, 33, None, 78]
    ], idx, col, object)

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可能的解决方案

p1.combine_first(p2)

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pd.concat([p1, p2], axis=1, keys=['p1', 'p2'])