Question

我在我的python项目中使用mypy进行类型检查。我也使用PyYAML来读取和编写项目配置文件。不幸的是，当使用recommended import mechanism from the PyYAML documentation时，这会在尝试导入本机库的try / except子句中生成虚假错误：

from yaml import load, dump
try:
    from yaml import CLoader as Loader, CDumper as Dumper
except ImportError:
    from yaml import Loader, Dumper

我的系统CLoader和CDumper不存在，导致错误error: Module 'yaml' has no attribute 'CLoader'和error: Module 'yaml' has no attribute 'CDumper'。

有没有办法让mypy忽略此行的错误？我希望我可以做这样的事情让mypy跳过这一行：

from yaml import load, dump
try:
    from yaml import CLoader as Loader, CDumper as Dumper  # nomypy
except ImportError:
    from yaml import Loader, Dumper

Answer 1

您可以使用0.57 # type: ignore执行此操作（此提交已关闭的问题#500, Ignore specific lines）：

PEP 484 uses # type: ignore for ignoring type errors on particular lines, and mypy should support that. Also, using # type: ignore close to the top of a file should skip checking that file altogether.

Answer 2

我宁愿在mypy.ini

中进行配置

例如，忽略Django迁移：

[mypy-*.migrations.*]
ignore_errors = True

Answer 3

如果要使用shebang，并且要忽略的文件顶部也# mypy: ignore-errors起作用，

#!/usr/bin/env python 
#-*- coding: utf-8 -*-
# mypy: ignore-errors

Gvanrossum comment

mypy如何忽略源文件中的单行？

3 个答案: