把一列拆分成两列
例如name拆分成first name+last name
import pandas as pd
employees = pd.read_excel('employee.xlsx',index_col = 'ID')
df = employees['Full Name'].str.split(n=3,expand = True)
# 默认空格切割 n:最多保留个数
employees['Fiest Name'] = df[0].str.upper()
# 全大写
employees['Last Name'] = df[2]
# 分割成两个
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