跳转至

如何从熊猫数据框中获取细胞值?

原文:https://www.geeksforgeeks.org/如何从熊猫获取细胞价值-dataframe/

在本文中,我们将讨论如何从熊猫数据框中获取细胞值。

方法一:使用 loc() 功能

此方法用于通过使用列名获取具有索引功能的特定单元格数据

语法:

dataframe['column_name']。loc[data frame.index[row_number]]

哪里,

  • 数据帧是输入数据帧
  • index 是获取单元格的 row_numer 的函数
  • column_name 表示单元格的列名

示例:使用 loc()函数获取特定单元格的 Python 程序

蟒蛇 3

# import pandas module
import pandas as pd

# create dataframe with 3 columns
data = pd.DataFrame({
    "id": [7058, 7059, 7072, 7054],
    "name": ['sravan', 'jyothika', 'harsha', 'ramya'],
    "subjects": ['java', 'python', 'html/php', 'php/js']
}
)

# get the cell value using loc() function
# in id column and 1 row
print(data['id'].loc[data.index[0]])

# get the cell value using loc() function
# in id column and 2 row
print(data['id'].loc[data.index[1]])

# get the cell value using loc() function
# in id column and 3 row
print(data['id'].loc[data.index[2]])

# get the cell value using loc() function
# in id column and 4 row
print(data['id'].loc[data.index[3]])

# get the cell value using loc() function
# in name column and 1 row
print(data['name'].loc[data.index[0]])

# get the cell value using loc() function
# in name column and 2 row
print(data['name'].loc[data.index[1]])

# get the cell value using loc() function
# in subjects column and 3 row
print(data['subjects'].loc[data.index[2]])

# get the cell value using loc() function
# in subjects column and 4 row
print(data['subjects'].loc[data.index[3]])

输出:

7058
7059
7072
7054
sravan
jyothika
html/php
php/js

方法二:使用iloc【】

此方法用于通过使用列名和行索引号来访问单元格数据。

语法:

dataframe['column_name']。iloc[行号]

在哪里

  • 数据帧是输入数据帧
  • row_numer 表示单元格的单元格行位置
  • column_name 表示单元格的列名

示例:使用 iloc 函数获取单元格值的 Python 程序

蟒蛇 3

# import pandas module
import pandas as pd

# create dataframe with 3 columns
data = pd.DataFrame({
    "id": [7058, 7059, 7072, 7054],
    "name": ['sravan', 'jyothika', 'harsha', 'ramya'],
    "subjects": ['java', 'python', 'html/php', 'php/js']
}
)

# get the cell value using iloc() function
# in id column and 1 row
print(data['id'].iloc[0])

# get the cell value using iloc() function
# in id column and 2 row
print(data['id'].iloc[1])

# get the cell value using iloc() function
# in name column and 1 row
print(data['name'].iloc[0])

# get the cell value using iloc() function
# in id column and 4 row
print(data['name'].iloc[3])

# get the cell value using iloc() function
# in subjects column and 1 row
print(data['subjects'].iloc[0])

# get the cell value using iloc() function
# in subjects column and 4 row
print(data['subjects'].iloc[3])

输出:

7058
7059
sravan
ramya
java
php/js

方法 3:使用 values()函数

这将通过提供行号和列名来返回单元格值。

语法:

dataframe['column_name']。值[行号]

哪里,

  • 数据帧是输入数据帧
  • row_numer 表示单元格的单元格行位置
  • column_name 表示单元格的列名

示例:从数据框中获取单元格值的 Python 代码

蟒蛇 3

# import pandas module
import pandas as pd

# create dataframe with 3 columns
data = pd.DataFrame({
    "id": [7058, 7059, 7072, 7054],
    "name": ['sravan', 'jyothika', 'harsha', 'ramya'],
    "subjects": ['java', 'python', 'html/php', 'php/js']
}
)

# get the cell value using values() function
# in id column and 1 row
print(data['name'].values[0])

# get the cell value using values() function
# in id column and 2 row
print(data['id'].values[1])

# get the cell value using values() function
# in name column and 1 row
print(data['name'].values[0])

# get the cell value using values() function
# in id column and 4 row
print(data['name'].values[3])

# get the cell value using values() function
# in subjects column and 1 row
print(data['subjects'].values[0])

# get the cell value using values() function
# in subjects column and 4 row
print(data['subjects'].values[3])


回到顶部