Book Image

Mastering pandas - Second Edition

By : Ashish Kumar
Book Image

Mastering pandas - Second Edition

By: Ashish Kumar

Overview of this book

pandas is a popular Python library used by data scientists and analysts worldwide to manipulate and analyze their data. This book presents useful data manipulation techniques in pandas to perform complex data analysis in various domains. An update to our highly successful previous edition with new features, examples, updated code, and more, this book is an in-depth guide to get the most out of pandas for data analysis. Designed for both intermediate users as well as seasoned practitioners, you will learn advanced data manipulation techniques, such as multi-indexing, modifying data structures, and sampling your data, which allow for powerful analysis and help you gain accurate insights from it. With the help of this book, you will apply pandas to different domains, such as Bayesian statistics, predictive analytics, and time series analysis using an example-based approach. And not just that; you will also learn how to prepare powerful, interactive business reports in pandas using the Jupyter notebook. By the end of this book, you will learn how to perform efficient data analysis using pandas on complex data, and become an expert data analyst or data scientist in the process.
Table of Contents (21 chapters)
Free Chapter
1
Section 1: Overview of Data Analysis and pandas
4
Section 2: Data Structures and I/O in pandas
7
Section 3: Mastering Different Data Operations in pandas
12
Section 4: Going a Step Beyond with pandas

Excel

Excel files are similar to CSV files but are different in the sense that they can have multiple sheets, formatted data and tables, charts, and formulas. In many cases, reading data from Excel files is required.

xlrd is the package of choice while working with Excel sheets. Some of the major functionalities of the xlrd package are summarized in the following table:

Code snippet

Goal achieved

import xlrd

Importing the xlrd library

book=xlrd.open_workbook('SRS Career.xlsx')

Reading the Excel workbook

n=book.nsheets

Finding the number of sheets in a workbook

book.sheet_names()

Finding the names of sheets in a workbook

last_sheet=book.sheet_by_index(n-1)

Reading the sheets by sheet index

last_sheet.row_values(0)

Getting the first row of a sheet

last_sheet.cell(0,0)

Getting the first cell of the sheet

last_sheet.row_slice...