Python一个热编码多元变量

Question

这是我的dataframe：

Name   Job
A      Back-end Engineer
B      Front-end Engineer;Product Manager
C      Product Manager;Business Development;System Analyst

我想将这些数据框架转换为假人(一个热编码(：

Name   Back-end Engineer   Business Development   Front-end Engineer   Product Manager  System Analyst
A      1                   0                      0                    0                0
B      0                   0                      1                    1                0
C      0                   1                      0                    1                0

我尝试使用pandas.get_dummies，但由于变量是多变量而失败的。

Answer 1

您可以尝试这样的事情：

import pandas as pd
from collections import defaultdict

df = pd.read_csv("path/to/your.csv")
jobs = df["Job"]
job_list = set()
for job in jobs:
  job_names = job.split(";")
  for job_name in job_names:
    job_list.add(job_name)
new_df = defaultdict(list)
for index, row in df.iterrows():
  new_df["Name"].append(row["Name"])
  for job in job_list:
    if job in row["Job"]:
      new_df[job].append(1)
    else:
      new_df[job].append(0)
new_df = pd.DataFrame.from_dict(new_df)
new_df.to_csv("/path/to/new.csv")