But part of the advantage with jQuery being single-file there is ease of deployment. Python isn't quite as handicapped in this areas as Javascript is. A single line in requirements.txt can add something as complex a complex library to your project without a second thought.
And you'll end up with the complexity of dependencies with mismatched and/or incompatible versions. Adding a dependency explicitly to the source code is the ultimate, albeit somewhat inefficient, solution which is often useful. In Python, for example, BeautifulSoup has long recommended this practice.
