Python Pandas - 没有 NaN 值的返回索引
要返回没有 NaN 值的 Index,请使用Pandas 中的方法。首先,导入所需的库 -index.dropna()
import pandas as pdimport numpy as np
使用一些 NaN 值创建 Pandas 索引 -
index = pd.Index([50, 10, 70, np.nan, 90, 50, np.nan, np.nan, 30])
显示熊猫指数 -
print("Pandas Index...\n",index)
仅删除 NaN 值 -
print("\nThe Index object after removing NaN values...\n",index.dropna())
示例
以下是代码 -
import pandas as pd输出结果import numpy as np
# 还使用一些 NaN 值创建 Pandas 索引
index = pd.Index([50, 10, 70, np.nan, 90, 50, np.nan, np.nan, 30])
# 显示 Pandas 索引
print("Pandas Index...\n",index)
# 返回索引中的元素数
print("\nNumber of elements in the index...\n",index.size)
# 返回数据的 dtype
print("\nThe dtype object...\n",index.dtype)
# 仅删除 NaN 值
print("\nThe Index object after removing NaN values...\n",index.dropna())
这将产生以下输出 -
Pandas Index...Float64Index([50.0, 10.0, 70.0, nan, 90.0, 50.0, nan, nan, 30.0], dtype='float64')
Number of elements in the index...
9
The dtype object...
float64
The Index object after removing NaN values...
Float64Index([50.0, 10.0, 70.0, 90.0, 50.0, 30.0], dtype='float64')
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