John questions

• Why can you specify multiple generic lifetimes on functions?
• What is the scope of a trait implementation on a type from the standard library in Rust?
• How to prevent deletion of Django model from Django Admin, unless part of a cascade
• Why am I getting a "bad file descriptor" error when writing file in rust?
• Can Python3's pathlib be used portably between Linux and Windows systems?
• How do you stop a StreamingHttpResponse in django when the client disconnects?
• How do I create and sign certificates with Python's pyOpenSSL?
• Why am I getting the "MySQL server has gone away" exception in Django?
• How does activating a python virtual environment modify sys.path?

John answers