Exclude Regex is not working for formatOnSave with vscode autopep8 extension

[kirankumarmanku]

The issue is explained here: microsoft/vscode-autopep8#141

VSCode Extension sends the content of file from std-in, and because of this, autopep8's exclude regex doesn't work. Is it possible to add a std-in-filename option like black-formatter to fix this annoyance? Without this, autopep8 and vscode's auto format don't work together well.