pyodide | Python distribution for the browser and Node.js | Binary Executable Format library

 by   pyodide Python Version: 0.26.0-alpha.1 License: MPL-2.0

kandi X-RAY | pyodide Summary

kandi X-RAY | pyodide Summary

pyodide is a Python library typically used in Programming Style, Binary Executable Format applications. pyodide has no bugs, it has no vulnerabilities, it has build file available, it has a Weak Copyleft License and it has medium support. You can install using 'pip install pyodide' or download it from GitHub, PyPI.

Pyodide is a port of CPython to WebAssembly/Emscripten. Pyodide makes it possible to install and run Python packages in the browser with micropip. Any pure Python package with a wheel available on PyPi is supported. Many packages with C extensions have also been ported for use with Pyodide. These include many general-purpose packages such as regex, PyYAML, lxml and scientific Python packages including NumPy, pandas, SciPy, Matplotlib, and scikit-learn. Pyodide comes with a robust Javascript ⟺ Python foreign function interface so that you can freely mix these two languages in your code with minimal friction. This includes full support for error handling (throw an error in one language, catch it in the other), async/await, and much more. When used inside a browser, Python has full access to the Web APIs.

            kandi-support Support

              pyodide has a medium active ecosystem.
              It has 10152 star(s) with 661 fork(s). There are 128 watchers for this library.
              There were 7 major release(s) in the last 6 months.
              There are 344 open issues and 1007 have been closed. On average issues are closed in 241 days. There are 55 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of pyodide is 0.26.0-alpha.1

            kandi-Quality Quality

              pyodide has 0 bugs and 0 code smells.

            kandi-Security Security

              pyodide has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              pyodide code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              pyodide is licensed under the MPL-2.0 License. This license is Weak Copyleft.
              Weak Copyleft licenses have some restrictions, but you can use them in commercial projects.

            kandi-Reuse Reuse

              pyodide releases are available to install and integrate.
              Deployable package is available in PyPI.
              Build file is available. You can build the component from source.
              Installation instructions are available. Examples and code snippets are not available.
              It has 15150 lines of code, 986 functions and 174 files.
              It has high code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed pyodide and discovered the below as its top functions. This is intended to give you an instant insight into pyodide implemented functionality, and help decide if they suit your requirements.
            • Returns a directive that returns the directive for the Sphinx documentation .
            • Handle the command line .
            • Convert obj to JavaScript object .
            • Build packages from dependency graph .
            • Build a wheel .
            • Return a directive for the package summary .
            • Convert JSProxy to python .
            • Fix the f2c input .
            • Unpack the given buffer .
            • Evaluate code asynchronously .
            Get all kandi verified functions for this library.

            pyodide Key Features

            No Key Features are available at this moment for pyodide.

            pyodide Examples and Code Snippets

            Using Pyodide in a service worker-Detailed example-Service worker
            Pythondot img1Lines of Code : 87dot img1License : Weak Copyleft (MPL-2.0)
            copy iconCopy
            /* sw.js */
            // We're using the npm package xhr-shim, which assigns self.XMLHttpRequestShim
            Contributing to the "core" C Code-Structure of functions
            Pythondot img2Lines of Code : 82dot img2License : Weak Copyleft (MPL-2.0)
            copy iconCopy
            def f():
              try: # implicit
                a = do_something()
                b = do_something_else()
                c = a + b
                return some_func(c)
                # implicit, free references both on successful exit and on exception
            Using Pyodide in a service worker-Detailed example-Consumer
            Pythondot img3Lines of Code : 50dot img3License : Weak Copyleft (MPL-2.0)
            copy iconCopy
                Fetch and log data
            pyodide - test directives
            Pythondot img4Lines of Code : 300dot img4License : Non-SPDX (Mozilla Public License 2.0)
            copy iconCopy
            import collections
            import gzip
            import json
            import pathlib
            import sys
            import types
            from typing import Mapping, Union
            from docutils.frontend import OptionParser
            from docutils.utils import new_document
            # Shim sphinx-js Python 3.10 compatibility
            pyodide - jsdoc
            Pythondot img5Lines of Code : 149dot img5License : Non-SPDX (Mozilla Public License 2.0)
            copy iconCopy
            from collections import OrderedDict
            from typing import Any
            import docutils.parsers.rst.directives as directives
            from docutils import nodes
            from docutils.parsers.rst import Directive
            from docutils.parsers.rst import Parser as RstParser
            from docutils.  
            pyodide - lexers
            Pythondot img6Lines of Code : 47dot img6License : Non-SPDX (Mozilla Public License 2.0)
            copy iconCopy
            from pygments.lexer import bygroups, default, inherit, using
            from pygments.lexers import PythonLexer
            from pygments.lexers.html import HtmlLexer
            from pygments.lexers.javascript import JavascriptLexer
            from pygments.token import Name, Punctuation, Text,  
            How to use pyodide function more one times
            JavaScriptdot img7Lines of Code : 9dot img7License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            Modify variable values in bdb without ctypes
            Pythondot img8Lines of Code : 6dot img8License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            function frameLocalsToFast(frame){
               pyodide._module._PyFrame_LocalsToFast(frame.$$.ptr, 0);
               // Hopefully avoid memory leak
            copy iconCopy
            iOS 11
            [native code]:1 Unhandled Promise Rejection: Error: Out of executable memory in function at index 14480
            iOS 12
            pyodide.asm.js:8 Unhandled Promise Rejection: RangeError: Maximum call stack size exceeded.
            Inspecting Python object in Pyodide
            Pythondot img10Lines of Code : 52dot img10License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
               myvar = {"msg": "Hello from python"}
               from js import console
            (function() {
              var formatter = {

            Community Discussions


            How to use sqlalchemy via pyodide
            Asked 2022-Jan-21 at 10:05

            I understand that with Pyodide I can:

            A) install a pure Python package via micropip from PyPI or a URL to a .whl file




            Answered 2022-Jan-21 at 10:05

            Looks like it should work now.. I see, its added to the officially supported built-in packages.




            Signing payload in JS (Frontend) using EC and validating in Python
            Asked 2021-Dec-18 at 11:56

            I have a Python backend that generates public/private keys, generates a payload, then needs to get that payload signed by the client (ReactJS or pure JS), which is later verified.

            The implementation in Python looks like this:




            Answered 2021-Dec-18 at 11:56

            CryptoJS only supports symmetric encryption and therefore not ECDSA. WebCrypto supports ECDSA, but not secp256k1.
            WebCrypto has the advantage that it is supported by all major browsers. Since you can use other curves according to your comment, I will describe a solution with a curve supported by WebCrypto.
            Otherwise, sjcl would also be an alternative, a pure JavaScript library that supports ECDSA and especially secp256k1,

            WebCrypto is a low level API that provides the functionality you need like key generation, key export and signing. Regarding ECDSA WebCrypto supports the curves P-256 (aka secp256r1), P-384 (aka secp384r1) and p-521 (aka secp521r1). In the following I use P-256.

            The following JavaScript code generates a key pair for P-256, exports the public key in X.509/SPKI format, DER encoded (so it can be sent to the Python site), and signs a message:



            Pyodide unable to read xlsx files into pandas
            Asked 2021-Nov-16 at 04:22

            I'm trying to load xlsx files using pyodide. I able to load xls files correctly using the following code:



            Answered 2021-Nov-16 at 04:22

            So, I'm still not sure why directly read_excel or Excelfile functions don't work (especially since they just call openpyxl anyway), but I was able to get it to work by opening the file using openpyxl and then converting it to a dataframe. Working code below:



            Pyodide filesystem for NLTK resources : missing files
            Asked 2021-Nov-14 at 22:03

            I am trying to use NLTK in browser, thanks to pyodide. Pyodide starts well, manages to load NLTK, print its version.

            Nevertheless, while the package downloading seems fine, when invoking nltk.sent_tokenize(str), NLTK raises the error that it can't find the package "punkt".

            I would say the downloaded resource is lost somewhere, but I didn't understand well how Pyodide / WebAssembly manage files. Any insights ?

            Simple version:



            Answered 2021-Sep-02 at 14:53

            Short answer is that downloading files with Python currently won't work in Pyodide because http.client, requests etc require POSIX sockets which are not supported in the browser VM.

            It's curious that doesn't error though -- it should have.

            The workaround is to manually download the needed resources, for instance, using the JavaScript fetch API as illustrated in this comment;



            How to use pyodide function more one times
            Asked 2021-Aug-31 at 00:45

            I want run funcion to stemm each row of a table. I want do it after of HTML code is loaded, I try this



            Answered 2021-Aug-31 at 00:45

            You are loading Pyodide multiple times by including the loadPyodide call in the main function, which gives an error for your subsequent main calls. Move loadPyodide outside main should resolve the issue:



            Pyodide languagePluginLoader is not defined
            Asked 2021-Aug-27 at 16:42

            I have been using Pyodide to run some python in my website. It has been working up until recently, however now has begin giving this error,



            Answered 2021-Aug-27 at 16:42

            You're probably using a newer version of pyodide. Since 0.18.0, you should use loadPyodide with the pyodide base url instead, which gives the pyodide object in the callback:



            Pyodide Plotly out of memory, memory access out of bounds
            Asked 2021-Jun-03 at 12:10

            I've faced some interesting issue.

            The problem is when I run the code snippet with pyodide and console is opened it works properly:



            Answered 2021-Jun-03 at 12:10

            Assuming you are using Chrome, it's very likely a bug in Chrome 89 - 90, which should be fixed in Chrome 91.

            For more details see: pyodide#1507 and



            Pyodide runPythonAsync to html document
            Asked 2021-Apr-13 at 00:44

            I am trying to run a simple pyodide example, but am not too familiar with javascript or pyodide and am not sure why the output is undefined. The statement is executed fine as I can see the correct output in the console log, but I cannot assign the output to the document.

            here is the code



            Answered 2021-Apr-13 at 00:44

            Basically, you can implement your own function for printing. However, if you want to use exactly print you can override the function from JS:



            AttributeError: format not found - pyodide + joblib.dump + scikit-learn (TfidfVectorizer)
            Asked 2021-Mar-22 at 15:24

            I have pickled a SMS spam prediction model using pickle. Now, I want to use Pyodide to load the model in the browser.

            I have loaded the pickled file using pickle.loads in the browser:



            Answered 2021-Mar-21 at 20:00

            It's likely a pickle portability issue. Pickles should be portable between architectures¹, here amd64 and wasm32 however they are not portable across package versions. This means that package versions should be identical between the environement where you train your model and where you do the inference (pyodide).

            pyodide 0.16.1 includes Python 3.8.2, scipy 0.17.1 and scikit-learn 0.22.2. Which unfortunately means that you will have to build that version of scipy (and possibly numpy) from sources to train the model, since a Python 3.8 binary wheel doesn't exist for such an outdated version of scipy. In the future this should be resolved with pyodide#1293.

            The particular error you are getting is likely due to scipy.sparse version mimatch see scipy#6533

            ¹Though, tree based models in scikit-learn at present are not portable across architectures, and so won't unpickle in pyodide. This is known bug that should be fixed (scikit-learn#19602)



            How to build pyodide for iOS 12?
            Asked 2021-Mar-22 at 14:27

            Pyodide is working on iOS v13 and v14 but sometimes I get following errors on iOS v13.

            It is out of memory errors. Current pyodide size is approx. 25MB. So, are there any way to get rid of these errors? How can I build for very minimum usage not for scientific projects to make it run on iOS v12 also?





            Answered 2021-Mar-22 at 14:27

            sometimes I get following errors on iOS v13

            You should open a Github issue about it. It's likely a bug somewhere. You could try building with TOTAL_MEMORY multiplied by 2, to see if it helps.

            How can I build for very minimum usage not for scientific projects to make it run on iOS v12 also?

            If you don't load those packages, they have no impact on the main pyodide package, which consists only of CPython + Python/JS type conversion code.


            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            No vulnerabilities reported

            Install pyodide

            Pyodide offers three different ways to get started depending on your needs and technical resources. These include:.
            Use a hosted distribution of Pyodide: see the Getting Started documentation.
            Download a version of Pyodide from the releases page and serve it with a web server.
            Build Pyodide from source Build natively with make: primarily for Linux users who want to experiment or contribute back to the project. Use a Docker image: recommended for Windows and macOS users and for Linux users who prefer a Debian-based Docker image with the dependencies already installed.


            Please view the contributing guide for tips on filing issues, making changes, and submitting pull requests. Pyodide is an independent and community-driven open-source project. The decision-making process is outlined in the Project governance.
            Find more information at:

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            npm i pyodide

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            gh repo clone pyodide/pyodide

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