Impara Slicing Task

Sezione 1. Capitolo 19

single

Scorri per mostrare il menu

Slicing can be enhanced with a step argument, which allows you to extract characters at specific intervals.

This is useful when you want to select every second character, skip letters, or extract patterns from structured data like invoice numbers, transaction codes, or reports.

string[start : end : step]

start: the index where slicing begins (inclusive)
end: the index where slicing ends (exclusive)
step: the interval (e.g., 2 means every second character)

You can also omit one or more values:

string[::2] takes every second character from start to end;
string[5::3] starts at index 5 and takes every third character;
string[:-2:2] takes every second character from the beginning up to (but not including) the second-to-last character.

Example


              123
            
code = "TXN-2024-INV-0007"
sliced = code[0:13:5]
print(sliced)  # Output: T0N

We start at index 0
End at index 13 (exclusive)
Use a step of 5, which means: take every fifth character

Characters at indexes 0, 5, and 10 are 'T', '0', and 'N', so the output is 'T0N'.

This kind of slicing could be used to extract initials or control codes from structured strings in financial or document systems.

Compito

Scorri per iniziare a programmare

In an accounting system, filenames for financial reports are generated automatically. Each filename includes a prefix, the report type, and the year.

Your task is to use slicing with a step to extract the 1st and 3rd digits of the year (in this case, 2 and 2) from the filename. This result will serve as a simple year control code.

Soluzione

Cambia al desktop per esercitarti nel mondo realeContinua da dove ti trovi utilizzando una delle opzioni seguenti

Tutto è chiaro?

Grazie per i tuoi commenti!

Sezione 1. Capitolo 19

single

Chieda ad AI

Chieda pure quello che desidera o provi una delle domande suggerite per iniziare la nostra conversazione