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Apprendre Slicing Task | Python String Manipulation
Data Types in Python
course content

Contenu du cours

Data Types in Python

Data Types in Python

1. Getting Familiar With Numbers in Python
2. Mastering Boolean Logic in Python
3. Python String Manipulation
4. Bring All the Topics Together

book
Slicing Task

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.

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

Example

123
code = "TXN-2024-INV-0007" sliced = code[0:13:5] print(sliced) # Output: T0N
copy
  • 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', '2', and 'I', 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.

Tâche

Swipe to start coding

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.

Solution

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Section 3. Chapitre 7
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book
Slicing Task

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.

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

Example

123
code = "TXN-2024-INV-0007" sliced = code[0:13:5] print(sliced) # Output: T0N
copy
  • 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', '2', and 'I', 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.

Tâche

Swipe to start coding

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.

Solution

Switch to desktopPassez à un bureau pour une pratique réelleContinuez d'où vous êtes en utilisant l'une des options ci-dessous
Tout était clair ?

Comment pouvons-nous l'améliorer ?

Merci pour vos commentaires !

Section 3. Chapitre 7
Switch to desktopPassez à un bureau pour une pratique réelleContinuez d'où vous êtes en utilisant l'une des options ci-dessous
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