This issue describes how to implement the itertools concept exercise for the python track.
Getting started
Please please please read the docs before starting. Posting PRs without reading these docs will be a lot more frustrating for you during the review cycle, and exhaust Exercism's maintainers' time. So, before diving into the implementation, please read up on the following documents:
You can refer to one or more of the resources linked above, or analogous resources from a trusted source. We prefer using links within the Python Docs as the primary go-to, but other resources listed above are also good. Please try to avoid paid or subscription-based links if possible.
The same resources listed in this issue can be used as a starting point for the concepts/links.json file, if it doesn't already exist.
If there are particularly good/interesting information sources for this concept that extend or supplement the concept exercise material & the resources already listed -- please add them to the links.json document.
This file provides information about this concept for a student who has completed the corresponding concept exercise. It is intended as a reference for continued learning.
This can also be a summary/paraphrase of the document listed above, and will provide a brief introduction of the concept for a student who has not yet completed the concept exercise. It should contain a good summation of the concept, but not go into lots of detail.
This should also summarize/paraphrase the above document, but with enough information and examples for the student to complete the tasks outlined in this concept exercise.
For more information on concept exercises and formatting for the Python track config.json , please see concept exercise metadata. The track config.json file can be found in the root of the Python repo.
You can use the below for the exercise UUID. You can also generate a new one via exercism configlet, uuidgenerator.net, or any other favorite method. The UUID must be a valid V4 UUID.
.meta/config.json - see this link for the fields and formatting of this file.
.meta/design.md - see this link for the formatting of this file. Please use the Goal, Learning Objectives,Concepts, Prerequisites and , Out of Scope sections from this issue.
Implementation Notes
Code in the .meta/examplar.py file should only use syntax & concepts introduced in this exercise or one of its prerequisite exercises.
Please do not use comprehensions, generator expressions, or other syntax not previously covered. Please also follow PEP8 guidelines.
In General, tests should be written using unittest.TestCase and the test file should be named <EXERCISE-NAME>_test.py.
While we do use PyTest as our test runner and for some implementation tests, please check with a maintainer before using a PyTest test method, fixture, or feature.
Our markdown and JSON files are checked against prettier . We recommend setting prettier up locally and running it prior to submitting your PR to avoid any CI errors.
Help
If you have any questions while implementing the exercise, please post the questions as comments in this issue, or contact one of the maintainers on our Slack channel.
This issue has been automatically marked as abandoned 🏚 because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.
This issue describes how to implement the
itertools
concept exercise for the python track.Getting started
Please please please read the docs before starting. Posting PRs without reading these docs will be a lot more frustrating for you during the review cycle, and exhaust Exercism's maintainers' time. So, before diving into the implementation, please read up on the following documents:
Goal
This concept exercise is meant to teach an understanding/creation/use of the
itertools
module in Python.Learning objectives
Learn more about
iteration
tools the Python Standard Library provides through theitertools
module.Build and understanding of and use the following functions from the module, as well as practicing some of the recipes included :
count()
,cycle()
,, orrepeat()
accumulate()
product()
chain()
&chain.from_iterable()
groupby()
islice()
zip_longest()
and thezip() built-in
permutations()
combinations()
Out of scope
classes
&class customization
beyond the use of theitertools
methods.class-inheritance
beyond what is needed to customizeiteration
usingitertools
comprehensions
beyond what is needed to work withitertools
comprehensions
inlambdas
coroutines
decorators
beyond what is needed to work withitertools
functions
andhigher-order functions
beyond what might be needed to work withitertools
functools
and relatedmap()
,filter()
andfunctools.reduce()
(they have their own exercise which is a prerequisite to this one)generators
beyond what might be needed to work withitertools
(they have their own exercise which is a prerequisite to this one)lambdas
beyond what might be needed to work withitertools
assignment expression
or "walrus" operator (:=
)enums
Concepts
iteration
iterators
itertools
Prerequisites
These are the concepts/concept exercises the student needs to complete/understand before solving this concept exercise.
basics
booleans
comparisons
rich-comparisons
dicts
dict-methods
functions
functional tools
generators
higher-order functions
is
andis not
iteration
lists
list-methods
loops
numbers
sequences
sets
strings
string-methods
tuples
Resources to refer to
Python Docs: iterator definition | Python Docs: iterator types
for
Loops Work in PythonPython Docs:
itertools
modulePython Docs:
itertools
RecipesPython Module of the Week:
itertools
Florian Dahlitz: Python Introduction to Itertools
Real Python: Itertools in Python 3, By Example
Python Docs: eumulating container types
iterator
in Pythoniterator
PatternHints
For more information on writing hints see hints
links.json
For more information, see concept links file
concepts/links.json
file, if it doesn't already exist.links.json
document.Concept Description
Please see the following for more details on these files: concepts & concept exercises
Concept
about.md
Concept file/issue: There is currently no issue or files for the concept. They are TBD.
For more information, see Concept
about.md
Concept
introduction.md
For more information, see Concept
introduction.md
Exercise
introduction.md
For more information, see Exercise
introduction.md
Test-runner
No changes required to the Python Test Runner at this time.
Representer
No changes required to the Python Representer at this time.
Analyzer
No changes required to the Python Analyzer at this time.
Exercise Metadata - Track
For more information on concept exercises and formatting for the Python track
config.json
, please see concept exercise metadata. The trackconfig.json
file can be found in the root of the Python repo.You can use the below for the exercise UUID. You can also generate a new one via exercism configlet, uuidgenerator.net, or any other favorite method. The UUID must be a valid V4 UUID.
c4620b29-0db0-4541-8cfe-7048fab27f7f
Exercise Metadata Files Under
.meta/config.json
For more information on exercise
.meta/
files and formatting, see concept exercise metadata files.meta/config.json
- see this link for the fields and formatting of this file..meta/design.md
- see this link for the formatting of this file. Please use the Goal, Learning Objectives,Concepts, Prerequisites and , Out of Scope sections from this issue.Implementation Notes
.meta/examplar.py
file should only use syntax & concepts introduced in this exercise or one of its prerequisite exercises.unittest.TestCase
and the test file should be named<EXERCISE-NAME>_test.py
.Help
If you have any questions while implementing the exercise, please post the questions as comments in this issue, or contact one of the maintainers on our Slack channel.