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 "/in/foo.py", line 14
    output_cnt: int = 0  # \u8bb0\u5f55\u5df2\u8f93\u51fa\u7684\u5dee\u503c\u5bf9\u6570\u91cf
              ^
SyntaxError: invalid syntax

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 "/in/foo.py", line 14
    output_cnt: int = 0  # \u8bb0\u5f55\u5df2\u8f93\u51fa\u7684\u5dee\u503c\u5bf9\u6570\u91cf
              ^
SyntaxError: invalid syntax