Python： 如果将字典转化为DataFrame

Question

这样的字典：

D = {"A1":["T1"],
     "A2":["T1","T2"],
     "A3":["T1","T2","T3","T4"],
     "A4":[]
     "A5":["T1"]}

如何转化为如下的DataFrame:

Item	Value
A1	T1
A2	T1
A2	T2
A3	T1
A3	T2
A3	T3
A3	T4
A5	T1

Answer 1

import pandas as pd

D = {"A1":["T1"],
     "A2":["T1","T2"],
     "A3":["T1","T2","T3","T4"],
     "A4":[],
     "A5":["T1"]}
     
     
df = pd.DataFrame([(k, e) for k, v in D.items() for e in v])

Answer 2

请百度pandas的DataFrame()函数