Python：将字典打印到csv，每个键值都在一个新行中

我有以下数据

{'index': [1, 2, 3], 'similar': [[0, 2], [1, 2], [2, 1]], 'markets': [['A', 'C'], ['B', 'C'], ['A', 'B']]}

我想将其打印到csv文件，如下所示：

index   similar  markets
1       [0,2]   ['A','C']
2       [1,2]   ['B','C']
3       [2,1]   ['A','B']

with open('mycsvfile.csv', 'wb') as f:  # Just use 'w' mode in 3.x
    w = csv.DictWriter(f, a.keys())
    w.writeheader()
    w.writerow(a)

目前我的代码如下：

index   similar  markets
1       [0,2]   ['A','C']
2       [1,2]   ['B','C']
3       [2,1]   ['A','B']

with open('mycsvfile.csv', 'wb') as f:  # Just use 'w' mode in 3.x
    w = csv.DictWriter(f, a.keys())
    w.writeheader()
    w.writerow(a)

它会打印：

 index               similair                       markets
[1, 2, 3]   [[0, 2], [1, 2], [2, 1]]    [['A', 'C'], ['B', 'C'], ['A', 'B']]

CSV文件：

index,similar,markets
1,"[0, 2]","['A', 'C']"
2,"[1, 2]","['B', 'C']"
3,"[2, 1]","['A', 'B']"

CSV文件：

index,similar,markets
1,"[0, 2]","['A', 'C']"
2,"[1, 2]","['B', 'C']"
3,"[2, 1]","['A', 'B']"

---

您可以使用

pandas

库：

import pandas as pd

x = {'index': [1, 2, 3], 'similar': [[0, 2], [1, 2], [2, 1]], 'markets': [['A', 'C'], ['B', 'C'], ['A', 'B']]}

x = pd.DataFrame(x)
x.to_csv('mycsvfile.csv', index = False)

csv将是：

index,markets,similar
1,"['A', 'C']","[0, 2]"
2,"['B', 'C']","[1, 2]"
3,"['A', 'B']","[2, 1]"

---

您可以使用

pandas

库：

import pandas as pd

x = {'index': [1, 2, 3], 'similar': [[0, 2], [1, 2], [2, 1]], 'markets': [['A', 'C'], ['B', 'C'], ['A', 'B']]}

x = pd.DataFrame(x)
x.to_csv('mycsvfile.csv', index = False)

csv将是：

index,markets,similar
1,"['A', 'C']","[0, 2]"
2,"['B', 'C']","[1, 2]"
3,"['A', 'B']","[2, 1]"

---

为什么逗号分隔的值文件不使用逗号分隔其值？为什么要将列表存储在CSV中？你确定你了解CSV是什么以及它们的用途吗？这个任务似乎更适合JSON。为什么逗号分隔的值文件不使用逗号分隔其值？为什么要将列表存储在CSV中？你确定你了解CSV是什么以及它们的用途吗？这个任务似乎更适合JSON。如果a的值发生变化，.keys（）列表将以不同的顺序返回！如果a的值更改，a.keys（）列表将以不同的顺序返回！