Related Articles

Related Articles

Get column index from column name of a given Pandas DataFrame
  • Last Updated : 26 Jul, 2020

In this article we will see how to get column index from column name of a Dataframe. We will use Dataframe.columns attribute and Index.get_loc method of pandas module together.

Syntax: DataFrame.columns

Return: column names index

Syntax: Index.get_loc(key, method=None, tolerance=None)

Return: loc : int if unique index, slice if monotonic index, else mask



Code: Let’s create a Dataframe:

Python3

filter_none

edit
close

play_arrow

link
brightness_4
code

# import pandas library
import pandas as pd
  
# dictionary
record = {'Math': [10, 20, 30
                   40, 70],
          'Science': [40, 50, 60,
                      90, 50], 
          'English': [70, 80, 66
                      75, 88]}
  
# create a dataframe
df = pd.DataFrame(record)
  
# show the dataframe
print(df)

chevron_right


Output:

Dataframe

Dataframe

Example 1: Get a index number of “Science” column.

Python3

filter_none

edit
close

play_arrow

link
brightness_4
code

# import pandas library
import pandas as pd
  
# dictionary
record = {'Math': [10, 20, 30, 40, 70],
          'Science': [40, 50, 60, 90, 50], 
          'English': [70, 80, 66, 75, 88]}
  
# give column name
col_name = "Science"
  
# find the index no
index_no = df.columns.get_loc(col_name)
  
print("Index of {} column in given dataframe is : {}".format(col_name, index_no))

chevron_right


Output :

index number of Science column

index number of Science column

Example 2: Get a index number of “English” column.

Python3

filter_none

edit
close

play_arrow

link
brightness_4
code

# import pandas library
import pandas as pd
  
# dictionary
record = {'Math': [10, 20, 30,
                   40, 70],
          'Science': [40, 50, 60,
                      90, 50], 
          'English': [70, 80, 66,
                      75, 88]}
  
# create a dataframe
df = pd.DataFrame(record)
  
# give column name
col_name = "English"
  
# find the index no
index_no = df.columns.get_loc(col_name)
  
print("Index of {} column in given dataframe is : {}".format(col_name, index_no))

chevron_right


Output :

index number of English column

index number of English column


Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.

To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course.




My Personal Notes arrow_drop_up
Recommended Articles
Page :