From 6f3429e5ba5b9fe3801dba1f7f44dc0410baff27 Mon Sep 17 00:00:00 2001 From: Varian Caesar Date: Sun, 13 Oct 2019 00:37:53 +0700 Subject: [PATCH 1/2] feat: Add list comprehension in list tutorial --- basics/lists-and-tuples.md | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/basics/lists-and-tuples.md b/basics/lists-and-tuples.md index 77ea0ca..2bb4dff 100644 --- a/basics/lists-and-tuples.md +++ b/basics/lists-and-tuples.md @@ -141,6 +141,17 @@ We'll talk more about loops [in the next chapter](loops.md). >>> ``` +Another useful things about list is **comprehension**. +**Comprehension** is a way to loop the list in single line. It makes our code more pythonic. + +```python +>>> numbers = [1,2,3,4,5] +>>> numbers_squared = [ number ** 2 for number in numbers ] +>>> numbers_squared +[1, 4, 9, 16, 25] +>>> +``` + We can also use slicing and indexing to change the content: ```python From bff51ee93b8c2c9fce4b85d1aad372aaf1fa43fb Mon Sep 17 00:00:00 2001 From: Varian Caesar Date: Mon, 21 Oct 2019 00:50:06 +0700 Subject: [PATCH 2/2] Add example with vs without list comprehension --- basics/lists-and-tuples.md | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/basics/lists-and-tuples.md b/basics/lists-and-tuples.md index 2bb4dff..41f7ad9 100644 --- a/basics/lists-and-tuples.md +++ b/basics/lists-and-tuples.md @@ -142,7 +142,7 @@ We'll talk more about loops [in the next chapter](loops.md). ``` Another useful things about list is **comprehension**. -**Comprehension** is a way to loop the list in single line. It makes our code more pythonic. +**Comprehension** is a way to construct a list in single line. It makes our code more clean, shorter and easier to read. ```python >>> numbers = [1,2,3,4,5] @@ -152,6 +152,18 @@ Another useful things about list is **comprehension**. >>> ``` +without comprehension: + +```python +>>> numbers = [1,2,3,4,5] +>>> numbers_squared = [] +>>> for number in numbers: +... numbers_squared.append(number**2) +>>> numbers_squared +[1, 4, 9, 16, 25] +>>> +``` + We can also use slicing and indexing to change the content: ```python pFad - Phonifier reborn

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