In this post I will discuss about of GitHub packages on python type checker in python compliant with PEP 484.
Pyre is a performant type checker for Python compliant with PEP 484. Pyre can analyze codebases with millions of lines of code incrementally – providing instantaneous feedback to developers as they write code.
Pyre ships with Pysa, a security-focused static analysis tool we’ve built on top of Pyre that reasons about data flow in Python applications.
$ brew install python3 watchman
On Ubuntu, Mint, or Debian; use
apt-get and homebrew:
$ sudo apt-get install python3 python3-pip python3-venv $ brew install watchman
We tested Pyre on Ubuntu 18.04.5 LTS, CentOS 7, as well as OSX 10.11 and later.
Setting up a Project:
We start by creating an empty project directory and setting up a virtual environment:
$ mkdir my_project && cd my_project $ python3 -m venv ~/.venvs/venv $ source ~/.venvs/venv/bin/activate (venv) $ pip install pyre-check
Next, we teach Pyre about our new project:
(venv) $ pyre init
This command will set up a configuration for Pyre (
.pyre_configuration) as well as watchman (
.watchmanconfig) in your project’s directory. Accept the defaults for now – you can change them later if necessary.
We are now ready to run Pyre:
(venv) $ echo "i: int = 'string'" > test.py (venv) $ pyre ƛ Found 1 type error! test.py:1:0 Incompatible variable type : i is declared to have type `int` but is used as type `str`.
This first invocation will start a daemon listening for filesystem changes – type-checking your project incrementally as you make edits to the code. You will notice that subsequent invocations of
pyre will be faster than the first one.
If you find anything helpful on this post please comment and share this post and also wants to improve WhatsApp Us.