Skip to content
Related Articles

Related Articles

Capitalize first letter of a column in Pandas dataframe
  • Last Updated : 06 Dec, 2018

Analyzing real-world data is somewhat difficult because we need to take various things into consideration. Apart from getting the useful data from large datasets, keeping data in required format is also very important.

One might encounter a situation where we need to capitalize any specific column in given dataframe. Let’s see how can we capitalize first letter of a column in Pandas dataframe.

Let’s create a dataframe from the dict of lists.




# Create a simple dataframe
   
# importing pandas as pd
import pandas as pd
  
   
# creating a dataframe
df = pd.DataFrame({'A': ['john', 'bODAY', 'minA', 'Peter', 'nicky'],
                  'B': ['masters', 'graduate', 'graduate',
                                   'Masters', 'Graduate'],
                  'C': [27, 23, 21, 23, 24]})
   
df

Output:

There are certain methods we can change/modify the case of column in pandas dataframe. Let’s see how can we capitalize first letter of columns using capitalize() method.



Method #1:




# Create a simple dataframe
   
# importing pandas as pd
import pandas as pd
  
   
# creating a dataframe
df = pd.DataFrame({'A': ['john', 'bODAY', 'minA', 'Peter', 'nicky'],
                  'B': ['masters', 'graduate', 'graduate',
                                   'Masters', 'Graduate'],
                  'C': [27, 23, 21, 23, 24]})
   
df['A'] = df['A'].str.capitalize()
  
df

Output:

 
Method #2: Using lambda with capitalize() method




# Create a simple dataframe
   
# importing pandas as pd
import pandas as pd
  
   
# creating a dataframe
df = pd.DataFrame({'A': ['john', 'bODAY', 'minA', 'Peter', 'nicky'],
                  'B': ['masters', 'graduate', 'graduate',
                                   'Masters', 'Graduate'],
                  'C': [27, 23, 21, 23, 24]})
   
df['A'].apply(lambda x: x.capitalize())

Output:

 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. And to begin with your Machine Learning Journey, join the Machine Learning – Basic Level Course

My Personal Notes arrow_drop_up
Recommended Articles
Page :