python - 元组列表转为 CSV

Question

我有一个如下所示的元组列表

  [("color", "blue"), ("size","50"), ("length","60"),("color", "red"), ("size","40")]

我想要一个像这样的 csv 文件(当然没有 Header，values )

标题 1. 颜色 |尺寸|长度

值 2. 蓝色 | 50 | 50 60

值 3. 红色 | 40|无

我尝试过这个，但效果不太好

with open('file.csv','w') as out:
    for title in final: # list name
        titles.append(title[0])
    csv_out=csv.writer(out)
    csv_out.writerow(titles)
    for row in final:
        csv_out.writerows(row[1])

Answer 1

尝试这种方法

import pandas as pd
import numpy as np
from collections import defaultdict 
t = [("color", "blue"), ("size","50"), ("length","60"),("color", "red"), ("size","40")]
d = dict((y, x) for x, y in t)

res = defaultdict(list) 
for key, val in sorted(d.items()): 
    res[val].append(key)

df = pd.DataFrame.from_dict(res, orient='index').fillna(np.nan).T
df.to_csv("file.csv")