Pandas Cheat Sheet

Pandas cheat sheet¶¶

PYTHON PANDAS Cheat Sheet by sanjeev95 - Cheatography.com Created Date: 0656Z. Python For Data Science Cheat Sheet Pandas Basics Learn Python for Data Science Interactively at www.DataCamp.com Pandas DataCamp Learn Python for Data Science Interactively Series DataFrame 4 Index 7-5 3 d c b A one-dimensional labeled array a capable of holding any data type Index Columns A two-dimensional labeled data structure with columns.

Pandas is Python Data Analysis library. Series and Dataframes are major data structures in Pandas. Pandas is built on top of NumPy arrays.

ToC

• Series
• DataFrames
  • Slicing and dicing DataFrames
  • Conditional selection
  • Operations on DataFrames
  • DataFrame index

Series¶¶

Series is 1 dimensional data structure. It is similar to numpy array, but each data point has a label in the place of an index.

Create a series¶¶

Thus Series can have different datatypes.

Operations on series¶¶

You can add, multiply and other numerical opertions on Series just like on numpy arrays.

When labels dont match, it puts a nan. Thus when two series are added, you may or may not get the same number of elements

DataFrames¶¶

Creating dataFrames¶¶

Pandas DataFrames are built on top of Series. It looks similar to a NumPy array, but has labels for both columns and rows.

Slicing and dicing DataFrames¶¶

You can access DataFrames similar to Series and slice it similar to NumPy arrays

Access columns¶¶

Accessing using index number¶¶

If you don’t know the labels, but know the index like in an array, use iloc and pass the index number.

Dicing DataFrames¶¶

Dicing using labels > use DataFrameObj.loc[[row_labels],[col_labels]]

Conditional selection¶¶

When running a condition on a DataFrame, you are returned a Bool dataframe.

Chaining conditions¶¶

In a Pythonic way, you can chain conditions

Multiple conditions¶¶

You can select dataframe elements with multiple conditions. Note cannot use Python and , or. Instead use &,

Operations on DataFrames¶¶

Adding new columns¶¶

Create new columns just like adding a kvp to a dictionary.

Dropping rows and columns¶¶

Row labels are axis = 0 and columns are axis = 1

Python Pandas Documentation Pdf

DataFrame Index¶¶

So far, Car1, Car2.. is the index for rows. If you would like to set a different column as an index, use set_index. If you want to make index as a column rather, and use numerals for index, use reset_index

Set index¶¶

Pandas Cheat Sheet For Data Analysis

Pandas Cheat Sheet Pdf