Introduction to pandas [track]

Introduction to pandas [track]

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1. Basics

In the first section of the course you will learn two basic objects provided by pandas - Series and DataFrame. You will learn how to create them and change their indexes or column names.

What is pandas?

Indexes and Values

Indexes and Columns

2. Reading and Exploring Data

Often the necessary data are stored in some files. You need to be able to load these data and gain the first insights.

Reading CSV Files

Reading XLS/XLSX Files

Exploring Data [1/3]

Exploring Data [2/3]

Exploring Data [3/3]

3. Accessing DataFrame Values

Once you have loaded the data as Series/DataFrame, you need to be able to get certain data based on needs. You will learn how to access rows, columns, and filter observations by conditions.

Accessing Specific Columns

Accessing Specific Rows

Accessing Rows and Columns

Accessing using .loc[] [1/3]

Accessing using .loc[] [2/3]

Accessing using .loc[] [3/3]

4. Aggregate Functions

In the last section of the course, you will get to know how to calculate some aggregate statistics of your data, such as mean, median, sum, product. Also you will learn how to count values and get only unique observations.

Number of Observations

Unique Observations

Counting Values

Sum and Product

Mean and Median

Minimum and Maximum

Course Content

Introduction to pandas [track]

Introduction to pandas [track]

Reading CSV Files

As a data analyst, you most likely will not create DataFrames by yourself - often you will work with some tabular data, most likely stored in the csv format.

To read a csv file, use the pd.read_csv() function, passing the path to file (web link, or path in file system). When reading, you may set the column that will be used as indexes (index_col parameter, either column' name, or index).

During this course, we will work with one dataset audi_cars (source). This dataset contains information of price, transmission, mileage, fuel type, road tax, miles per gallon (mpg), and engine size of used cars. First, let's read this file (from web link).


              123456
            
# Importing library
import pandas as pd

# Reading csv file
df = pd.read_csv('https://codefinity-content-media.s3.eu-west-1.amazonaws.com/67798cef-5e7c-4fbc-af7d-ae96b4443c0a/audi.csv')
print(df)

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Section 2. Chapter 1

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