bind_activitypub(app, handler)
Tobias Ziegler, TU Darmstadt
，更多细节参见有道翻译
If you liked this essay, you’ll love reading The Point in print.
Safe parsing — int_from_string() and float_from_string() return a Result type that you can match on for error handling (see Chapter 10 for details on Result types):
print_string(".");