Bonbon's Guide To Data & Tech

Microsoft Excel Tutorial: VLOOKUP in Python for Excel

How to do a VLOOKUP or XLOOKUP in Python.

To download the examples in this workbook: https://www.mrexcel.com/youtube/h6__fB7vo4k/

Along the way, you will see:
101: Doing a VLOOKUP
Not specifying the key field!
What if a customer is missing from lookup table? How to IFERROR()
Limiting which fields are returned.
What if headings don’t match?
What if a customer is duplicated?
Lookup on two fields.

Table of Contents
(0:00) Python lookup overview
(0:25) Comment indicator in Python
(1:00) VLOOKUP 101 in Python using pd.merge
(2:36) Leaving off the On field
(2:50) IFERROR when customer missing with .FillNA
(3:23) Limiting lookup table to needed fields
(4:04) Headings don’t match Continue reading “Excel Python XLOOKUP 2619” →

Microsoft Excel Tutorial: Hiding part of Social Security Number

Download this workbook from: https://www.mrexcel.com/youtube/MeCptGsHsYY/

Someone from the Veterans Administration is getting data downloaded that includes the entire social security number (SSN). They only want to display the last four of the SSN. But, sometimes, they need to be able to go back and see the entire SSN.

I have two solutions today, but I bet you have something better.

First, it would be nice if Excel offered a custom number formatting code that said “There is a digit here, but we don’t want to display it”.

My first solution is a pair Continue reading “Excel Display Only Last 4 Of Social Security Number – Episode 2618” →

Microsoft Excel Tutorial: Using a function in Python for Excel calculations.
The problem today: Count how many times a word occurs in a cell in Excel.

To download this workbook: https://www.mrexcel.com/youtube/6Ydb6rIls6M/

The first solution is a series of six formulas in Excel, including SUBSTITUTE, LEN, and more. While it is complicated in Excel, there is a much easier way in Python, using the .Count function. So, Python has a simpler version but how do you call the function from Excel?

After the Python solution, I used the Excel Labs add-in to convert the original six formulas to a LAMBDA.

Other Continue reading “Excel Python Custom Function – 2617” →

Microsoft Excel Tutorial: Using Python in Excel to create Excel-like pivot tables.

I love pivot tables in Excel. In fact, I’ve written an entire book on Pivot Tables. So when I saw that Python has a function to generate “Excel-like” Pivot Tables in a new data frame, I wanted to try it out.

The Python Pivot Table is missing a few things:
1. Row Fields are called Index
2. Defaults to Average instead of Sum
3. Empty cells show as errors. Use fill_value
4. No Grand Totals by default! Turn on with margins=True
5. When you add Grand Totals, they are called “All” Unless you change them Continue reading “Python Pivot Tables In Excel -Episode 2616” →

Microsoft Excel Tutorial: Python in Excel
After using Python in Excel for 2 days, I am gaining confidence. Topics today:
• Python Tips from Day 2
• Slow rollout of Python
• Paying for Anaconda
• Python Libraries to explore
• How to write Python results back to Excel grid
• Real-life K-Means clustering with 18K customers, 30K transactions, 300 products

To download the first workbook: https://www.mrexcel.com/youtube/GMF1E0dmjWs/
The second workbook contains actual customer data and I am not sharing it at this time.

Table of Contents
(0:00) Welcome
(0:45) Keyboard shortcuts for Python
(1:22) Leila tip DF.Customer eliminates square bracket notation
(2:14) Seaborn Library of Charts as shown by Mynda
(2:49) Continue reading “Gaining Confidence With Python In Excel – 2615” →