• Python was fun in the past with quick script writing and pleasant syntax.
• Now it causes rage and sadness with non-trivial code due to type and exception issues.
• Python uses duck typing, making it hard to determine variable types without running code.
• Variables can have multiple types based on program flow, leading to runtime errors.
• MyPy is a step in the right direction but has limitations and a bad syntax.
• In a ~3500 LoC Python library/program, there are 25 # type: ignore annotations.
• Python's exception management is poor with no way to declare raised exceptions.
• Tools to validate caught exceptions are lacking.
• Examples like re.compile, tarfile.open, and PIL show various possible exceptions.
• Wrapping stdlib calls in try: … except Exception: is bad.
• Dealing with untrusted file formats requires meaningful exceptions.
• Python is old but still has issues like raising strange exceptions.
• Don't let friends write production code in Python with weird file formats as things will explode.