Yes of course there will be exceptions. But the vast majority off Python code bases are not mercurial or dropbox or imgur. Just like the vast majority of software using companies are not google or facebook.
The average few hundred to few thousand loc app, which should be 98% of all production code-bases will almost certainly port with no issue.
The average few hundred to few thousand loc app, which should be 98% of all production code-bases will almost certainly port with no issue.