我生成了一个 DataFrame，其中包含一个名为“pred_categories”的列，其数值为 0、1、2 和 3。见下文：
fileids pred_categories
0 /Saf/DA192069.txt 3
1 /Med/DA000038.txt 2
2 /Med/DA000040.txt 2
3 /Saf/DA191905.txt 3
4 /Med/DA180730.txt 2
我写了一个字典：
di = {3: "SAF", 2: "MED", 1: "FAC", 0: "ENV"}
它首先起作用：
df.replace({'pred_categories': di})
Out[16]:
fileids pred_categories
0 /Saf/DA192069.txt SAF
1 /Med/DA000038.txt MED
2 /Med/DA000040.txt MED
3 /Saf/DA191905.txt SAF
4 /Med/DA180730.txt MED
5 /Saf/DA192307.txt SAF
6 /Env/DA178021.txt ENV
7 /Fac/DA358334.txt FAC
8 /Env/DA178049.txt ENV
9 /Env/DA178020.txt ENV
10 /Env/DA178031.txt ENV
11 /Med/DA000050.txt MED
12 /Med/DA180720.txt MED
13 /Med/DA000010.txt …