How to convert or change the datatypes of columns in a pandas dataframe ?. For more details, please refer to the blog https://amalgjose.com/2020/05/22/how-to-convert-or-change-the-data-type-of-columns-in-pandas-dataframe

convert_datatype.py

import pandas as pd

# create a sample dataframe
df = pd.DataFrame({'emp_id': ['111', '112', '113'], 'salary': ['40000', '50000', '60000'], 'name':['amal', 'sabitha', 'edward']})
# print the dataframe
print(df)
# print the datatypes in the dataframe
print(df.dtypes)
# now let us convert the data type of salary to integer
df = df.astype({'salary':'int'})
# print the dataframe
print(df)
# print the datatypes in the dataframe
print(df.dtypes)