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Article Python Fundamentals
…function that rejects negative numbers and asks again. 2. Countdown Write countdown(start) that prints the numbers from start down to 1, followed by "Liftoff!". Then add a second parameter for that…
Quiz
Free Python quiz for beginners: 20 multiple-choice questions on print(), strings, lists, dictionaries, loops and functions, with instant answers.
Example
The nonlocal keyword gives access to variables in the enclosing function.
Challenge
…one Find the first ERROR entry, print its line number, counting from 1, with the entry itself, and stop searching there: First error on line 4: [T+00:14:47] ERROR Fuel valve 2 not responding Loop with…
Example
Lists store multiple elements in a specific order. Basics of working with lists.
Example
Accessing individual characters and text fragments. Zero-based indexing in Python.
Example
Parameters sep and end let you control separator and line ending in print function.
Challenge
…you'll see your prediction next to what Python printed. Count the positions in CG-0042 carefully before you guess. Investigate and modify Investigate. Store the index of the dash in dash_index and the…
Quiz
…for every item: every planet in a list, every second of a countdown, every letter in a word. This free quiz has 15 short questions that check you can predict how many times a loop runs and what it…
Challenge
…new entry with it, then read the file back, print it, and count its lines: [T+00:10:00] INFO Orbit insertion complete [T+00:12:05] WARN Battery 3 temperature high [T+00:14:47] ERROR Fuel valve 2 not…
