Re:Parse, Don’t Validate
by aidenn0 on Friday November 08, 2019 @11:14AM
(#21483586)
In the style TFA you should wrap pickle.load() with a function that will unpickle the specific type you are expecting. So you should write a unpickleArrayOfInts() or whatever.
The actual type would be a rather large union type, which would be unwieldy to use (but in an untyped system like python you still would need to deal with all of those corner cases to have a program that is correct in the face of arbitrary input).
Really the biggest annoyance of type systems is that they make you deal with corner cases that you don't think are practically possible. If you are right, then they are wasting your time. If you are wrong, then they are saving you from having bugs.
The actual type would be a rather large union type, which would be unwieldy to use (but in an untyped system like python you still would need to deal with all of those corner cases to have a program that is correct in the face of arbitrary input).
Really the biggest annoyance of type systems is that they make you deal with corner cases that you don't think are practically possible. If you are right, then they are wasting your time. If you are wrong, then they are saving you from having bugs.