Python isnull(): Find Missing Values

1 year ago
Ava Mitchell
1 minute

In Python, the isnull() method is typically used to determine missing values through the Series or DataFrame objects in the pandas library. Here is an example:

import pandas as pd

# 创建一个包含缺失值的DataFrame
data = {'A': [1, 2, None], 'B': [3, None, 5]}
df = pd.DataFrame(data)

# 判断DataFrame中的缺失值
print(df.isnull())

The output yields:

       A      B
0  False  False
1  False   True
2   True  False

In this example, the isnull() method will return a DataFrame of boolean values, where True indicates that the value at the corresponding position is missing, and False indicates that the value at the corresponding position is not missing.

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