Converting column names to lowercase using str.lower() in Pandas
Pandas: Data Cleaning and Preprocessing Exercise-11 with Solution
Write a Pandas program to change column names to lowercase.
In this exercise, we have changed the column names of a DataFrame to lowercase using str.lower().
Sample Solution :
Code :
import pandas as pd
# Create a sample DataFrame with uppercase column names
df = pd.DataFrame({
'Name': ['Selena', 'Annabel', 'Caeso'],
'Age': [25, 30, 22],
'Salary': [50000, 60000, 70000]
})
# Convert all column names to lowercase
df.columns = df.columns.str.lower()
# Output the result
print(df)
Output:
name age salary 0 Selena 25 50000 1 Annabel 30 60000 2 Caeso 22 70000
Explanation:
- Created a DataFrame with uppercase column names.
- Used str.lower() to convert all column names to lowercase.
- Outputted the DataFrame with the new lowercase column names.
Python-Pandas Code Editor:
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