Python For Data Science Cheat Sheet

Posted on |



I am going to help you to get started with Data Science using Python in this beginner’s guide. An awesome powerful high-level, object-oriented programming language preferred by Data Scientist. In this cheat sheet, we’ll summarize some of the most common and useful functionality. Python for Data Science Cheat Sheet. Here the cheat sheet of Basic Python for data science. Numpy Tutorial: After you understand Python Basic, you can start to learn Numpy, one of the most powerful library in Python to handle big array/matrix. I strongly recommend to understand Numpy first before you go to Pandas/Scipy/or Scikit-learn. Here the Numpy cheat sheet. Mar 15, 2021 Pandas Cheat Sheet — Python for Data Science March 4, 2020 If you're interested in working with data in Python, you're almost certainly going to be using the pandas library. But even when you've learned pandas — perhaps in our interactive pandas course — it's easy to forget the specific syntax for doing something.

You have just started with python and looking for a python data science cheat sheet I have added some gathered from different resources. This will help you a lot because this cheatsheet for python is also helpful for those who are interested in data science.

This will help you as a handy guide and you can refer to it whenever you have doubts. So let’s start with python basic elements.

Python Basics

Thanks, I hope this will help you, and if you want to recommend some please free to reach us. Also, share with your friends to help them.

But if you are absolute beginner and looking for free data science courses using python refer to our article here.

Pandas Cheat Sheet Pdf

Are you looking for examples of using Python for data analysis? This article is for you. We will show you how to accomplish the most common data analysis tasks with Python, from the features of Python itself to using modules like Pandas to a simple machine learning example with TensorFlow. Let’s dive in.

A Note About Python Versions

All examples in this cheat sheet use Python 3. We recommend using the latest stable version of Python, for example, Python 3.8. You can check which version you have installed on your machine by running the following command in the system shell:

Sometimes, a development machine will have Python 2 and Python 3 installed side by side. Having two Python versions available is common on macOS. If that is the case for you, you can use the python3 command to run Python 3 even if Python 2 is the default in your environment:
If you don’t have Python 3 installed yet, visit the Python Downloads page for instructions on installing it.


Launch a Python interpreter by running the python3 command in your shell:

Libraries and Imports

The easiest way to install Python modules that are needed for data analysis is to use pip. Installing NumPy and Pandas takes only a few seconds:
Once you’ve installed the modules, use the import statement to make the modules available in your program:

Getting Help With Python Data Analysis Functions

If you get stuck, the built-in Python docs are a great place to check for tips and ways to solve the problem. The Python help() function displays the help article for a method or a class:
The help function uses the system text pagination program, also known as the pager, to display the documentation. Many systems use less as the default text pager, just in case you aren’t familiar with the Vi shortcuts here are the basics:

  • j and k navigate up and down line by line.
  • / searches for content in a documentation page.
    • After pressing / type in the search query, press Enter to go to the first occurrence.
    • Press n and N to go forward and back through the search results.
  • Ctrl+d and Ctrl+u move the cursor one page down and one page up, respectively.

Another useful place to check out for help articles is the online documentation for Python data analysis modules like Pandas and NumPy. For example, the Pandas user guides cover all the Pandas functionality with explanations and examples.

Python For Data Science Cheat Sheet Numpy Pdf

Basic language features

A quick tour through the Python basics:


There are many more useful string methods in Python, find out more about them in the Python string docs.

Science

Working with data sources

Pandas provides a number of easy-to-use data import methods, including CSV and TSV import, copying from the system clipboard, and reading and writing JSON files. This is sufficient for most Python data analysis tasks:
Find all other Pandas data import functions in the Pandas docs.

Working with Pandas Data Frames

Cheat

Pandas data frames are a great way to explore, clean, tweak, and filter your data sets while doing data analysis in Python. This section covers a few of the things you can do with your Pandas data frames.

Exploring data

Here are a few functions that allow you to easily know more about the data set you are working on:

Python For Data Science Book

Statistical operations

All standard statistical operations like minimums, maximums, and custom quantiles are present in Pandas:

Cleaning the Data

It is quite common to have not-a-number (NaN) values in your data set. To be able to operate on a data set with statistical methods, you’ll first need to clean up the data. The fillna and dropna Pandas functions are a convenient way to replace the NaN values with something more representative for your data set, for example, a zero, or to remove the rows with NaN values from the data frame.


Filtering and sorting

Python For Data Science Course

Here are some basic commands for filtering and sorting the data in your data frames.

Machine Learning

While machine learning algorithms can be incredibly complex, Python’s popular modules make creating a machine learning program straightforward. Below is an example of a simple ML algorithm that uses Python and its data analysis and machine learning modules, namely NumPy, TensorFlow, Keras, and SciKit-Learn.

In this program, we generate a sample data set with pizza diameters and their respective prices, train the model on this data set, and then use the model to predict the price of a pizza of a diameter that we choose.

Once the model is set up we can use it to predict a result:

Python For Data Science Cheat Sheet Datacamp

Summary

In this article, we’ve taken a look at the basics of using Python for data analysis. For more details on the functionality available in Pandas, visit the Pandas user guides. For more powerful math with NumPy (it can be used together with Pandas), check out the NumPy getting started guide.


To learn more about Python for data analysis, enroll in our Data Analysis Nanodegree program today.