Years ago, I fell in love with python and left C an C++ behind. Sometime later,
I fell in love with C# because with strong typing, my IDE does most of the work
for me - I never have to browse the API to find which method or attribute
exists in a class, I can use tab completion for everything, avoid type-o's,
etc. So I was recently thrilled to discover type hinting in python, and support
included in pycharm. I'm coming back to python now (for the last few months).
In python 3.6.1, and pycharm CE 2017.1.1 on windows (I haven't tested other
versions or other platforms):
The following is recognized and supported by pycharm, but then at runtime,
python throws an exception:
#!/usr/bin/env python3
def foo(bars: list[str]):
for bar in bars:
if bar.startswith("hi"):
raise
ValueError("bar should never say hi")
return True
if foo(["a","b","c"]):
print("Ok")
TypeError: 'type' object is not subscriptable
The problem is that python doesn't recognize list[str] as a type. Pycharm
handles it, and everything works fine if I'm using a non-subscripted type, like
plain old int, or str, or anything else.
Is this a bug, or is it something python simply hasn't implemented yet, or is
it something that's not going to be implemented?
Is there a workaround?
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