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We were taught not to use exceptions for control flow, and reading a file which does not exist is a pretty normal thing to handle in code flow, rather than exce
by verdverm 1y ago
We were taught not to use exceptions for control flow, and reading a file which does not exist is a pretty normal thing to handle in code flow, rather than exceptions.
That simple example in Python is missing all the other stuff you have to put around it. Go would have another error check, but I get to decide, at that point in the execution, how I want to handle it in this context
- pansa2 1y agoIn Python, it’s common to use exceptions for control flow. Even exiting a loop is done via an exception: `StopIteration`.
- arccy 1y agoisn't break more normal
- pansa2 11mo agoI’d say it’s more common for iterator-based loops to run to completion than to hit a `break` statement. The `StopIteration` exception is how the iterator signals that completion.
- zephen 11mo agoThe point is that the use of exceptions is built into the language, so, for example, if you write "for something in somegeneratorfunction():" then somegeneratorfunction will signal to the for loop that it is finished by raising this exception.
- ivanyu 11mo agoIt's not "common". You have to deal with StopIteration only when you write an iterator with the low-level API, which is maybe once in the career time for most of developers.