When running the statement
from __future__ import annotations I get the following error:
Traceback (most recent call last): File "/usr/lib/python3.5/py_compile.py", line 125, in compile _optimize=optimize) File "<frozen importlib._bootstrap_external>", line 735, in source_to_code File "<frozen importlib._bootstrap>", line 222, in _call_with_frames_removed File "./prog.py", line 1 from __future__ import annotations ^ SyntaxError: future feature annotations is not defined During handling of the above exception, another exception occurred: Traceback (most recent call last): File "<string>", line 1, in <module> File "/usr/lib/python3.5/py_compile.py", line 129, in compile raise py_exc py_compile.PyCompileError: File "./prog.py", line 1 from __future__ import annotations ^ SyntaxError: future feature annotations is not defined What could be the cause of this error?
1 Answer
Looking at your error traceback, it looks like you are using python 3.5. Is that the case?
If so, then the error happens because according to PEP-563 the import of __future__ annotations is available starting with Python 3.7.
I did not find any hints that this will be backported to previous versions, but I might have missed that.
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