Python 如何拆分数据帧，使其为每个拆分值创建一列

例如

输入数据帧

Name     Subjects
Ramesh   Maths,Science
Rakesh   MAths,Science,Social Studies
John     Social Science, Lietrature

Name     Subject1       Subject2     Subjects3
Ramesh   Maths          Science      NaN
Rakesh   MAths          Science      Social Studies
John     Social Science Literature   Nan

输出数据帧

Name     Subjects
Ramesh   Maths,Science
Rakesh   MAths,Science,Social Studies
John     Social Science, Lietrature

Name     Subject1       Subject2     Subjects3
Ramesh   Maths          Science      NaN
Rakesh   MAths          Science      Social Studies
John     Social Science Literature   Nan

---

您可以根据的结果创建新的df，然后执行以下操作：

您可以使用

pd.concat（[df['Name']，df['Subjects'].str.split（'，'，，expand=True）]，axis=1）