layout	title	permalink
default	List comprehensions	/comprehensions

List comprehensions

You have two options to open the list_comprehensions.ipynb file (in the notebooks/ folder):

with Jupyter Lab: open a terminal and enter the following commands:
```
conda activate pyclass
jupyter lab
```
with Visual Studio Code: open the notebook as a regular file. If asked, specify you need to use the pyclass environment.

Exercices using list comprehensions and iterators

Given a list of words, create a list that contains the length of these words.
Given a list of potentially duplicated words, create a sorted list of unique words.
Given a sentence, count the number of occurrences of each vowels in the text. (Think first about the structure you want to use)
Write a set comprehension that contains all prime numbers less than 50.
Given two lists of numbers, create a new list containing the pairwise sum of elements.
Given a matrix as a list of list, use zip() to transpose the matrix.
Given a list of elements, use enumerate() to find the index of the smallest item in the list.

Given two list of integers, create a list of interleaved elements.

>>> interleave(["un", "deux", "trois"], [1, 2, 3])
["un", 1, "deux", 2, "trois", 3]