alfie-grace-headshot-square2.jpg
Alfie Grace Data Scientist

Alfie graduated with a Master's degree in Mechanical Engineering from University College London. He's currently working as a top-rated data scientist on Upwork. Find him on LinkedIn.

Python

TypeError: list indices must be integers or slices, not str

May 14th, 2021
Read Now »
alfie-grace-headshot-square2.jpg
Author: Alfie Grace
Data Scientist

Python

Python close() File – Open and Close Files Properly

May 16th, 2021
Read Now »
alfie-grace-headshot-square2.jpg
Author: Alfie Grace
Data Scientist

Python

IndentationError: expected an indented block

May 21st, 2021
Read Now »
alfie-grace-headshot-square2.jpg
Author: Alfie Grace
Data Scientist

Python

SyntaxError: unexpected EOF while parsing

May 24th, 2021
Read Now »
alfie-grace-headshot-square2.jpg
Author: Alfie Grace
Data Scientist

Python

ValueError: too many values to unpack (expected 2)

May 28th, 2021
Read Now »
alfie-grace-headshot-square2.jpg
Author: Alfie Grace
Data Scientist

Python

IndexError: list index out of range and python

June 2nd, 2021
Read Now »
alfie-grace-headshot-square2.jpg
Author: Alfie Grace
Data Scientist

Python

TypeError: can only concatenate str (not "int") to str

June 8th, 2021
Read Now »
alfie-grace-headshot-square2.jpg
Author: Alfie Grace
Data Scientist

Quickly Substring a String in Python

June 18th, 2021
Read Now »
alfie-grace-headshot-square2.jpg
Author: Alfie Grace
Data Scientist

Python Square Root: Real and Complex

June 22nd, 2021
Read Now »
alfie-grace-headshot-square2.jpg
Author: Alfie Grace
Data Scientist

Python

Python String Contains – See if String Contains a Substring

July 1st, 2021
Read Now »
alfie-grace-headshot-square2.jpg
Author: Alfie Grace
Data Scientist

Python Check if Files Exist – os.path, Pathlib, try/except

July 5th, 2021
Read Now »
alfie-grace-headshot-square2.jpg
Author: Alfie Grace
Data Scientist

Python

Python Absolute Value – abs() for real and complex numbers

July 8th, 2021
Read Now »
alfie-grace-headshot-square2.jpg
Author: Alfie Grace
Data Scientist

Python

Python TypeError: sequence item N: expected string, list found

July 13th, 2021
Read Now »
alfie-grace-headshot-square2.jpg
Author: Alfie Grace
Data Scientist

Python

ValueError: The truth value of a series is ambiguous. use a.empty, a.bool(), a.item(), a.any() or a.all()

July 31st, 2021
Read Now »
alfie-grace-headshot-square2.jpg
Author: Alfie Grace
Data Scientist

Python

How to Move Files in Python: Single and Multiple File Examples

August 4th, 2021
Read Now »
alfie-grace-headshot-square2.jpg
Author: Alfie Grace
Data Scientist

Python

Python break statement: break for loops and while loops

August 9th, 2021
Read Now »
alfie-grace-headshot-square2.jpg
Author: Alfie Grace
Data Scientist

Python

Python List Comprehension: single, multiple, nested, & more

August 23rd, 2021
Read Now »
alfie-grace-headshot-square2.jpg
Author: Alfie Grace
Data Scientist

Python

Python Continue - Controlling for and while Loops

September 22nd, 2021
Read Now »
alfie-grace-headshot-square2.jpg
Author: Alfie Grace
Data Scientist

Python ValueError: invalid literal for int() with base 10

September 24th, 2021
Read Now »
alfie-grace-headshot-square2.jpg
Author: Alfie Grace
Data Scientist

Python

Python pass statement: When, why, and how to use it

October 21st, 2021
Read Now »
alfie-grace-headshot-square2.jpg
Author: Alfie Grace
Data Scientist

Python

How to iterate over rows in Pandas: Most efficient options

October 31st, 2021
Read Now »
alfie-grace-headshot-square2.jpg
Author: Alfie Grace
Data Scientist

Python AttributeError: 'tuple' object has no attribute

November 24th, 2021
Read Now »
alfie-grace-headshot-square2.jpg
Author: Alfie Grace
Data Scientist

Career

DataCamp vs Dataquest 2021: Which is better for data science?

July 15th, 2021
Read Now »
alfie-grace-headshot-square2.jpg
Author: Alfie Grace
Data Scientist

Get updates in your inbox

Join over 7,500 data science learners.