Pandas DataFrame:如果满足多个条件，则将整数赋给新列

import pandas as pd

# 创建DataFrame对象
df = pd.DataFrame({'A': [1, 2, 3, 4, 5],
                   'B': [6, 7, 8, 9, 10],
                   'C': [11, 12, 13, 14, 15]})

# 满足条件的行赋值为新整数值
df.loc[(df['A'] > 2) & (df['B'] < 9), 'NewColumn'] = 100

print(df)

   A   B   C  NewColumn
0  1   6  11        NaN
1  2   7  12        NaN
2  3   8  13      100.0
3  4   9  14        NaN
4  5  10  15        NaN