如何找到 3 个数据帧的所有组合并将它们 return 作为列表

Question

假设我有 3 个数据帧。每个数据帧中都有字符串，我想找到这 3 个数据帧的所有可能组合并将它们输出为列表。我在 Whosebug 上搜索了一段时间，尝试了很多代码，但没有一个有效。我尝试导入 intertools、组合等，但仍然有错误的输出或根本没有输出。

def combinator(names,cities,streets) #for example

在我最后一次尝试中，我尝试使用以下代码仅将名称与城市结合起来：

names.merge(cities, how = 'cross')
names['key'] = 1
cities['key'] = 1
combined = pd.merge(names,cities,on='key').drop('key', axis = 1)

但只复制了所有名称。目标是在一个列表中找到名称、城市和街道的所有可能组合，并 return 它们。感谢所有建议。

输入数据帧

Answer 1

这是你想要的吗？

>>> from datar.all import f, tibble, bind_cols, expand, nesting
>>> 
>>> df1 = tibble(
...     name=["John", "Nick", "Eric"], job=["engineer", "architect", "deisgner"]
... )
>>> df2 = tibble(
...     city=["London", "Montresor", "Esslingen"],
...     bigness=["captical", "villege", "town"],
... )
>>> df3 = tibble(
...     street=["street1", "street2", "street3"],
...     population=["high", "low", "average"],
... )
>>> 
>>> df = bind_cols(df1, df2, df3)
>>> df >> expand(
...     nesting(f.name, f.job),
...     nesting(f.city, f.bigness),
...     nesting(f.street, f.population),
... )
       name        job       city   bigness   street population
   <object>   <object>   <object>  <object> <object>   <object>
0      John   engineer     London  captical  street1       high
1      John   engineer     London  captical  street2        low
2      John   engineer     London  captical  street3    average
3      John   engineer  Montresor   villege  street1       high
4      John   engineer  Montresor   villege  street2        low
5      John   engineer  Montresor   villege  street3    average
6      John   engineer  Esslingen      town  street1       high
7      John   engineer  Esslingen      town  street2        low
8      John   engineer  Esslingen      town  street3    average
9      Nick  architect     London  captical  street1       high
10     Nick  architect     London  captical  street2        low
11     Nick  architect     London  captical  street3    average
12     Nick  architect  Montresor   villege  street1       high
13     Nick  architect  Montresor   villege  street2        low
14     Nick  architect  Montresor   villege  street3    average
15     Nick  architect  Esslingen      town  street1       high
16     Nick  architect  Esslingen      town  street2        low
17     Nick  architect  Esslingen      town  street3    average
18     Eric   deisgner     London  captical  street1       high
19     Eric   deisgner     London  captical  street2        low
20     Eric   deisgner     London  captical  street3    average
21     Eric   deisgner  Montresor   villege  street1       high
22     Eric   deisgner  Montresor   villege  street2        low
23     Eric   deisgner  Montresor   villege  street3    average
24     Eric   deisgner  Esslingen      town  street1       high
25     Eric   deisgner  Esslingen      town  street2        low
26     Eric   deisgner  Esslingen      town  street3    average

我是 datar 的作者，这是一个在 python 中实现数据操作语法的包，以 pandas 和 modin 作为后端。

如何找到 3 个数据帧的所有组合并将它们 return 作为列表

How to find all combinations of 3 dataframes and return them as list

python

combinations

list

dataframe

pandas