向从多个变量计算的dataframe中插入新列

import pandas as pd

df = pd.DataFrame({'var1': [1, 2, 3, 4],
                   'var2': [5, 6, 7, 8],
                   'var3': [9, 10, 11, 12]})

def calculate_new_column(row):
    # 根据需要的计算逻辑，使用row中的变量计算新列的值
    return row['var1'] + row['var2'] + row['var3']

df = df.assign(new_column=df.apply(calculate_new_column, axis=1))

df['new_column'] = df.apply(calculate_new_column, axis=1)