Pandas: Fill new column by condition row-wise

Question

import pandas as pd
import numpy as np

df = pd.DataFrame([np.random.rand(100),100*[0.1],100*[0.3]]).T
df.columns = ["value","lower","upper"]

df.head()

How can I create a new column which indicates that value is between lower and upper ?

Answer 1

您可以为此使用between 。

df['new_col'] = df['value'].between(df['lower'], df['upper'])