Python Pandas - 检查索引是否有 NaN
要检查索引是否有 NaN,请使用Pandas 中的index.hasnans属性。
首先,导入所需的库 -
import pandas as pdimport numpy as np
创建索引。对于 NaN,我们使用了 numpy 库 -
index = pd.Index(['Car','Bike', np.nan,'Car',np.nan, 'Ship'])
显示索引 -
print("Pandas Index...\n",index)
检查索引是否有 NaN -
print("\nIs the Pandas index having NaNs?\n",index.hasnans)
示例
以下是代码 -
import pandas as pd输出结果import numpy as np
# 创建索引
# 对于 NaN,我们使用了 numpy 库
index = pd.Index(['Car','Bike', np.nan,'Car',np.nan, 'Ship'])
# 显示索引
print("Pandas Index...\n",index)
# 返回一个表示索引中数据的数组
print("\nArray...\n",index.values)
# 检查索引是否有 NaN
print("\nIs the Pandas index having NaNs?\n",index.hasnans)
# 返回基础数据形状的元组
print("\nA tuple of the shape of underlying data...\n",index.shape)
这将产生以下代码 -
Pandas Index...Index(['Car', 'Bike', nan, 'Car', nan, 'Ship'], dtype='object')
Array...
['Car' 'Bike' nan 'Car' nan 'Ship']
Is the Pandas index having NaNs?
True
A tuple of the shape of underlying data...
(6,)
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