fatal error C1083: Cannot open include file: 'sqlfront.h': No such file or directory

If your environment is something like below:

• Windows operating system, either 10 or 11
• Python 3.13

You are trying to install pymssql, and

You hit this error message: fatal error C1083: Cannot open include file: 'sqlfront.h': No such file or directory

The quick answer for this issue is:

• Downgrade your Python to version 3.12. You can easily get it from Microsoft Store.
• After that, run this command to install pymssql as usual: pip install pymssql

Note: Please don't waste your time for that freetds thingy.. it won't work. A lot of links shared via stackoverflow forums already being removed or outdated.

How to verify the signature of your *.apk file?

 The easiest way to do it using the keytool command.

Example:

keytool -printcert -jarfile <apk_file>

Could not start Dart VM service HTTP server

Environment:

Visual Studio Code v1.83.1

Symtomps:

1). When you try to debug your Flutter project, you see this error message at the Terminal "Could not start Dart VM service HTTP server"

2). You will also notice that the Hot Reload, Hot Restart are all gone!

Solution:

a). Please go to <Your_Project_Path>\android\app\src\debug folder, confirm if you have AndroidManifest.xml in that debug folder.

b). Go to <Your_Project_Path>android\app\src\profile folder, copy AndroidManifest.xml and paste it to the debug folder at Step [a].

c). Type 'flutter run' at Terminal and Hot Reload, Hot Restart should work now.

Explanation at Flutter Docs did mention how Dart VM service work with that Hot Reload and Hot Restart features. Refer https://docs.flutter.dev/tools/vs-code#hot-reload-vs-hot-restart

Happy coding!

10 steps to setup your Python Luno trading bots on Microsoft Azure

10 steps to setup your Python Luno trading bots on Microsoft Azure.

Step 1: Create a Virtual Machine for Ubuntu with size = B1s. You may choose the cheapest region, which is East US 2 - refer https://azureprice.net/. You do not need any graphical user interface for this Ubuntu.

• To save cost, you can consider to remove public ip from your Virtual Machine after you completed all 10 steps.
• Please do not worry about the connection because the bots will still running.
• You just need to associate a new public ip to your Virtual Machine when you need it - refer https://learn.microsoft.com/en-us/azure/virtual-network/ip-services/associate-public-ip-address-vm

Step 2: Now, configure the SSH to only allows the public IP address from your computer.

Step 3: Log into that Virtual Machine to remove Python 2.7 and upgrade it to version 3.10 - refer https://www.itsupportwale.com/blog/how-to-upgrade-to-python-3-10-on-ubuntu-18-04-and-20-04-lts/. Remember to install pip too.

Step 4: Now, install MySQL on your Virtual Machine using sudo command - refer https://linuxize.com/post/how-to-install-mysql-on-ubuntu-18-04/.

Step 5: After that, install MySQL Client, MySQL Connector and Luno Python SDK on Python 3.10 inside your Virtual Machine. You might need setuptools as pre-requisites.

Step 6. Deploy the Python scripts for your bots.

Step 7. Check the configurations file.

Step 8. Build the database for your bots, which will be used to store trading information.

Step 9. Use nohup command to execute your Python bots at background.

Step 10. Use ps aux command to check whether your Step 9 has been done correctly or not.

Thanks.

"Character set 'utf8' unsupported" when you run Python script with MySQL database?

When you run Python script with MySQL database, system gives you this error message:

Character set 'utf8' unsupported

What Do You Need To Do?

pip uninstall mysql-connector-python

Unable to find resource t64.exe in package pip._vendor.distlib

 Hitting this error message "Unable to find resource t64.exe in package pip._vendor.distlib" when trying to upgrade your PIP to latest version?

Try to run the commands below:

• python -m pip uninstall pip setuptools
• pip install --upgrade setuptools

Source: https://www.cnblogs.com/poloyy/p/12966270.html

Supplied javaHome is not a valid folder. You supplied:

You hit this error message on Visual Studio Code (or Android Studio) for your IonicFramework project after you upgraded Java in your computer:

Supplied javaHome is not a valid folder. You supplied: <folder_name_with_path>

What Is The Solution?

a). Make sure Android Studio > Settings > Build, Execution, Deployment > Build Tools > Gradle > Gradle JDK is pointing to the correct JDK version. Save all for changes.

b). For Windows, go to this folder "C:\Users\<your_Windows_user_name>\.gradle", delete all of the files and folders.

c). Go to "<your_project_folder>\android\.gradle" folder, delete all of the files and folders.

d). Run the commands below as usual:

ionic build 

npx cap copy

npx cap sync

npx cap open android