运行语句时
from __future__ import annotations
我收到以下错误：
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 …