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How to get column and row names in DataFrame?

  • Difficulty Level : Hard
  • Last Updated : 11 Jun, 2021

While analyzing the real datasets which are often very huge in size, we might need to get the rows or index names and columns name in order to perform some certain operations. 

Note: For downloading the nba dataset used in the below examples Click Here 

Getting row names in Pandas dataframe

First, let’s create a simple dataframe with nba.csv 

Python3




# Import pandas package
import pandas as pd
   
# making data frame
data = pd.read_csv("nba.csv")
   
# calling head() method 
# storing in new variable
data_top = data.head(10)
   
# display
data_top

Output: 



Now let’s try to get the row name from the above dataset.

Method #1: Simply iterate over indices 

Python3




# Import pandas package
import pandas as pd
   
# making data frame
data = pd.read_csv("nba.csv")
 
# calling head() method 
# storing in new variable
data_top = data.head()
   
# iterating the columns
for row in data_top.index:
    print(row, end = " ")

Output: 

0 1 2 3 4 5 6 7 8 9 

  
Method #2: Using rows with dataframe object 

Python3




# Import pandas package
import pandas as pd
   
# making data frame
data = pd.read_csv("nba.csv")
 
# calling head() method 
# storing in new variable
data_top = data.head()
   
# list(data_top) or
list(data_top.index)

Output: 



[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

  
Method #3: index.values method returns an array of index. 

Python3




# Import pandas package
import pandas as pd
   
# making data frame
data = pd.read_csv("nba.csv")
 
# calling head() method 
# storing in new variable
data_top = data.head()
   
list(data_top.index.values)

Output: 

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

  
Method #4: Using tolist() method with values with given the list of index. 

Python3




# Import pandas package
import pandas as pd
   
# making data frame
data = pd.read_csv("nba.csv")
 
# calling head() method 
# storing in new variable
data_top = data.head()
   
list(data_top.index.values.tolist())

Output: 

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

Method #5: Count number of rows in dataframe
Since we have loaded only 10 top rows of dataframe using head() method, let’s verify total number of rows first.

Python3




# iterate the indices and print each one
for row in data.index:
    print(row, end = " ")

Output: 



Now, let’s print the total count of index. 

Python3




# Import pandas package
import pandas as pd
   
# making data frame
data = pd.read_csv("nba.csv")
 
row_count = 0
 
# iterating over indices
for col in data.index:
    row_count += 1
 
# print the row count
print(row_count)

Output: 

458

Getting column names in Pandas dataframe

Now let’s try to get the columns name from nba.csv dataset.
Method #1: Simply iterating over columns 

Python3




# Import pandas package
import pandas as pd
   
# making data frame
data = pd.read_csv("nba.csv")
 
# iterating the columns
for col in data.columns:
    print(col)

Output: 

  
Method #2: Using columns with dataframe object 

Python3




# Import pandas package
import pandas as pd
   
# making data frame
data = pd.read_csv("nba.csv")
   
# list(data) or
list(data.columns)

Output: 
 



  
Method #3: column.values method returns an array of index. 

Python3




# Import pandas package
import pandas as pd
   
# making data frame
data = pd.read_csv("nba.csv")
   
list(data.columns.values)

Output: 
 

  
Method #4: Using tolist() method with values with given the list of columns. 

Python3




# Import pandas package
import pandas as pd
   
# making data frame
data = pd.read_csv("nba.csv")
   
list(data.columns.values.tolist())

Output: 
 

  
Method #5: Using sorted() method
Sorted() method will return the list of columns sorted in alphabetical order. 

Python3




# Import pandas package
import pandas as pd
   
# making data frame
data = pd.read_csv("nba.csv")
   
# using sorted() method
sorted(data)

Output: 
 

 

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