---
title: Python 3 cheatsheet
tags: [python3, python, cheatsheet]
updated: 2021-04-19 00:13
description: A series of instructions in Python I use frequently on several projects
---

## Table of contents

<!--TOC-->

- [Table of contents](#table-of-contents)
- [Introduction](#introduction)
- [pathlib](#pathlib)
  - [Files](#files)
  - [Paths](#paths)
- [PyYAML](#pyyaml)

<!--TOC-->

## Introduction

This is a list of instructions I use frequently in:

- [automated-tasks](https://blog.franco.net.eu.org/software/#automated-tasks)
- [fattura-elettronica-reader](https://blog.franco.net.eu.org/software/#fattura-elettronica-reader)
- [fpyutils](https://blog.franco.net.eu.org/software/#fpyutils)
- [md-toc](https://blog.franco.net.eu.org/software/#md-toc)

## pathlib

### Files

| Description | Code                                            | Imports |
|-------------|-------------------------------------------------|---------|
| new file    | `pathlib.Path(shlex.quote(path: str)).touch(0o700, exist_ok=True)` | `import pathlib, shlex` |
| remove file | `pathlib.Path(shlex.quote(path: str)).unlink(missing_ok=True)` | `import pathlib, shlex` |
| new directory | `pathlib.Path(shlex.quote(path: str)).mkdir(mode=0o700, parents=True, exist_ok=True)` | `import pathlib, shlex` |

### Paths

| Description | Code                                            | Imports |
|-------------|-------------------------------------------------|---------|
| get last path component from url | `pathlib.Path(urllib.parse.urlsplit(url: str).path).name` | `import pathlib, urllib` |
| get relative path | `pathlib.Path(shlex.quote(path: str)).name` | `import pathlib, shlex` |
| get full path | `str(pathlib.Path(shlex.quote(directory: str), shlex.quote(file: str)))` | `import pathlib, shlex` |
| remove file extension | `pathlib.Path(shlex.quote(path: str)).stem` | `import pathlib, shlex` |
| get file extension | `pathlib.Path(shlex.quote(path: str)).suffix` | `import pathlib, shlex` |
| get the path of a configuration file | `configuration_file = shlex.quote(sys.argv[1])` | `import shlex, sys` |

## PyYAML

| Description | Code                                            | Imports |
|-------------|-------------------------------------------------|---------|
| load a YAML file | `config = yaml.load(open(file: str, 'r'), Loader=yaml.SafeLoader)` | `import yaml` |