upper method in Pandas
 In Pandas, the upper() method is used to convert string values to uppercase. It is typically applied using the .str accessor on Series objects (usually string columns in a DataFrame). 
Syntax df['column_name'].str.upper()
Example:
Python
import pandas as pd
df = pd.DataFrame({
    'name': ['alice', 'Bob', 'ChARlie']
})
df['name_upper'] = df['name'].str.upper()
print(df)  The output of the above code is shown below:
