Tag Python
Some of the PyScript WASM files are large. For example, pyodide.asm.wasm is ~9.5 MB. Correctly setting up your web server to serve these files takes some consideration. You should configure several items in your web server. This article covers Apache… Continue Reading →
Knowing that an error occurred is the first step to preventing and solving errors. There are many types of errors that PyScript applications will experience. Network failures, resources not being available and programming mistakes are just a few problems to… Continue Reading →
PyScript PWA Creating installable PyScript applications that cache assets and runs offline offer enormous potential for Python. In this article, I will show you how to create a Python application that installs on the desktop and on mobile devices. This… Continue Reading →
In PyScript, as well as JavaScript, there are only a few methods of getting data into your program: Read data from the local file system Read data from the network Input data from the user Create data inside your application… Continue Reading →
A recent article by Luciano Abriata criticized PyScript. He made two statements: Pyscript is way too slow and heavy to load. Does not support all of Python’s features and libraries. He then provided two example programs link and link. The… Continue Reading →
In this article, I will show how to use the File System Access API. This API is a web platform API that enables developers to build powerful web apps that interact with files on the user’s local device. There are… Continue Reading →
This article discusses downloading and building PyScript from the source for Ubuntu 20.04 running within Windows WSL. For Linux, skip over the first section covering WSL setup. This article is written for the Python developer with limited experience building JavaScript/Node.js… Continue Reading →
As momentum builds for PyScript, a few good resources are being created. This article is my attempt to keep track of the ones that are very good and/or have detailed knowledge. Please let me know if you know of one… Continue Reading →
This will be the first of several articles that provides details on Pyscript files and file systems. I will discuss the different virtual file systems and how to access files located on the desktop. I have put each example in… Continue Reading →
Introduction If you are familiar with using the Canvas with JavaScript, then you will quickly know how to draw on the Canvas with Python knowing a couple of minor items. If you are a Python developer new to drawing inside… Continue Reading →
Introduction There are times that you want to write pure HTML and JavaScript code and during runtime download and execute Python code based upon various criteria. This article shows how to create the <py-script> tag, load code into the py-script… Continue Reading →
Introduction Setting up Python event handlers in Pyscript requires special handling. Pyodide provides a proxy so that DOM events can use Python functions as callbacks. To create a proxy, call the pyodide.create_proxy() function [link].
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from pyodide import create_proxy # Create a Python proxy for the callback function function_proxy = create_proxy(myFunction) |
The Python function myFunction is… Continue Reading →
Introduction I have noticed an interesting anomaly between Pyodide and Pyscript. Pyscript takes about one second longer to load an HTML + Python page than Pyodide. Pyodide averages 2 seconds and Pyscript 3 seconds. Other interesting stats: Downloads: Pyodide downloads… Continue Reading →
Introduction Pyscript/Pyodide supports excellent interoperability between JavaScript and Python. Python can call JavaScript and JavaScript can call Python. DOM events can use Python functions as callbacks. This article covers Python calling JavaScript functions and how to pass and receive data… Continue Reading →
Introduction Today, you can now use Pyscript to run Python code in the web browser. This has enormous potential for AI, ML, Data Scientists, and regular Python developers. I often develop backend applications in Django and Flask, and the possibilities… Continue Reading →
Introduction This article demonstrates how to set up a Windows development system with Python and the Azure SDK for Python. After my article, Azure – Lock a VM to Prevent Deletion, I wrote the Azure CLI equivalent commands in Python…. Continue Reading →
Introduction I recently had a conversation with the Principle Security Architect for a large company concerned with security, identity, and access management. He asked me, “What language do you write your code in and why?”. I answered his question with… Continue Reading →
Socratica Python Kickstarter Campaign Introduction from Socratica’s Kickstarter Campaign Socratica – a small educational film studio with big dreams. You know us for our high-quality video lessons about math, science, and programming, especially PYTHON. Over the course of five… Continue Reading →
Introduction I watch a lot of training material from all the major education vendors (Pluralsight, Linux Academy, Cloud Academy, A Cloud Guru, and many others). For a long time, I have been wanting to add professional scriptwriting, and professional graphics… Continue Reading →
Table of Contents Introduction Definitions Example Private & Public Keys OpenSSH Public Keys SSH-2 Public Keys Examining OpenSSH Public Keys Introduction There is a lot of confusion and inaccurate information on the Internet about Key Pairs and Private/Public keys. This… Continue Reading →
Introduction On August 15, 2018, Google released the Alpha release of Google Cloud Run. Many of us saw the potential and went to work learning this new platform. Everything serverless gets our attention. Cloud Run is Google’s entry into serverless… Continue Reading →
This article shows how to display a list of Google Cloud Projects that you have access to list. This article includes two examples in Python that use two different Google Cloud Python libraries. These examples produce the same output as the… Continue Reading →
The following example shows several important steps to call Google Cloud APIs without using an SDK in Python. Similar code works in just about any language (c#, java, php, nodejs). Change the source code with the filename of your service… Continue Reading →
I have written a number of articles about Google Cloud Credentials. For Service Account credentials, there are two on-disk formats: P12 and Json. This article shows how to convert these credentials from P12 to Json.
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############################################################ # Version 1.00 # Date Created: 2018-12-22 # Last Update: 2018-12-22 # https://www2.jhanley.com # Copyright (c) 2018, John J. Hanley # Author: John Hanley ############################################################ ''' This program converts Google Service Account credentials from P12 format into Json format. The critical items to know: Service Account Email address that matches the service account credentials. If this is wrong, the credentials won't work (P12 or Json). Project ID. P12 Password. ''' import json import OpenSSL.crypto # This is the output file with the generated service account credentials from P12 credentials json_filename = 'service-account.json' # Details on the Google Service Account. The email must match the Google Console. project_id = 'development-123456' sa_filename = 'compute-engine.p12' sa_password = 'notasecret' sa_email = 'development-123456@developer.gserviceaccount.com' # client_id is the 'Unique ID' in the Google Console under 'Service account details' # This value is unique per service account email # Optional client_id = '123456789064738430393' # pkey_id is the 'Key ID' in the Google Console under 'Service account details' # This value is unique per key. One serice account can have more than one key issued # Optional pkey_id = 'e13865c612a34567abcdef1a8753d1c6789abcdb' def load_private_key(p12_path, p12_password): ''' Read the private key and return as base64 encoded ''' # print('Opening:', p12_path) with open(p12_path, 'rb') as f: data = f.read() # print('Loading P12 (PFX) contents:') p12 = OpenSSL.crypto.load_pkcs12(data, p12_password) # Dump the Private Key in PKCS#1 PEM format key = OpenSSL.crypto.dump_privatekey( OpenSSL.crypto.FILETYPE_PEM, p12.get_privatekey()) # return the private key return key def my_encode(s): ''' This routine encodes the Json 'client_x509_cert_url' ''' # Replace @ with %40 return s.replace('@', '%40') # Generate the cert_url cert_url = 'https://www.googleapis.com/robot/v1/metadata/x509/' + sa_email # Load the private key from P12 pkey = load_private_key(sa_filename, sa_password) # Json that will be writting to json_filename sa = { "type": "service_account", "project_id": project_id, "private_key_id": pkey_id, "private_key": pkey.decode('utf-8'), "client_email": sa_email, "client_id": client_id, "auth_uri": "https://accounts.google.com/o/oauth2/auth", "token_uri": "https://oauth2.googleapis.com/token", "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs", "client_x509_cert_url": my_encode(cert_url) } with open(json_filename, 'w') as outfile: json.dump(sa, outfile, indent=2) |
John HanleyI design… Continue Reading →
Google Service Account Credentials are available in two file formats: Json and P12. P12 is also known as PFX. The following code shows how to process a P12 file and split into Private Key and Certificate. This code also works… Continue Reading →
Google Service Account Credentials are available in two file formats: Json and P12. P12 is also known as PFX. The following code shows how to use P12 credentials to list the buckets in Google Cloud Storage without using an SDK…. Continue Reading →
I have worked with Google Cloud Stackdriver for about three months. The more I learn about Stackdriver the more I like it. Great product for logging, monitoring, error reporting, application tracing and application debugging and more. One of the items… Continue Reading →
Application Default Credentials Google Cloud Application Default Credentials (ADC) are not credentials. ADC is a strategy to locate Google Cloud Service Account credentials. Environment: If the environment variable GOOGLE_APPLICATION_CREDENTIALS is set, ADC will use the filename that the value contains for… Continue Reading →
Introduction If you have ever wanted to test Google OAuth 2.0 flows from the command-line, you will like this short article. [Update: I thought about the problem below with the copy and paste requirement. I created a simple python web… Continue Reading →
Google Cloud stores your credentials in a database on your system. These credentials can then be used over and over. Google’s choice of a database means that the CLI and SDK tools can manage a huge number of credentials efficiently…. Continue Reading →