的Python：印刷字典CSV，在新的一行中的鍵值

Question

，我有以下數據

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

，我想將它打印到CSV文件如下：

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

目前

我的代碼如下：

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) 

和它打印：

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

Answer 1

import csv 

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

with open('mycsvfile.csv', 'wb') as f: # Just use 'w' mode in 3.x 
    w = csv.writer(f) 
    w.writerow(keys) 
    w.writerows(zip(*[a[key] for key in keys])) 

CSV文件：

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

Answer 2

可以使用pandas庫：

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) 

的CSV將是：

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