Python 如何将覆盖率结果与tox相结合？

对于我的包，我有执行环境相关的代码，如

if sys.version_info < (3, 0):
   pass  # do something
else:
   pass  # do something else

和setup.cfg

[metadata]
description-file = README.md

[tool:pytest]
addopts = ./tests/ --doctest-modules --cov=./mpu --cov-report html:tests/reports/coverage-html --cov-report xml:tests/reports/coverage.xml --pep8 --ignore=docs/
doctest_encoding = utf-8

[pydocstyle]
ignore = D104, D105, D107, D301, D413, D203, D212, D100
match_dir = mpu

tox文件似乎满足了我的要求，但覆盖范围仅限于其中一个测试环境。我已经看过了，但它不起作用。对于第一次运行，它似乎没有执行所有测试，因为测试覆盖率比以前低了很多。我猜医生没有被处决。第二轮，我得到

ERROR: InvocationError: '/home/moose/GitHub/mpu/.tox/py27/bin/coverage run --source=mpu/ setup.py test'

系统 错误 现在我得到了这个错误：

======================================================================
ERROR: test_pd (unittest.loader._FailedTest)
----------------------------------------------------------------------
ImportError: Failed to import test module: test_pd
Traceback (most recent call last):
  File "/usr/lib/python3.6/unittest/loader.py", line 428, in _find_test_path
    module = self._get_module_from_name(name)
  File "/usr/lib/python3.6/unittest/loader.py", line 369, in _get_module_from_name
    __import__(name)
  File "/home/moose/GitHub/mpu/tests/test_pd.py", line 8, in <module>
    from mpu.pd import example_df
  File "/home/moose/GitHub/mpu/mpu/pd.py", line 10, in <module>
    import pandas as pd
  File "/home/moose/.local/lib/python3.6/site-packages/pandas/__init__.py", line 42, in <module>
    from pandas.core.api import *
  File "/home/moose/.local/lib/python3.6/site-packages/pandas/core/api.py", line 10, in <module>
    from pandas.core.groupby.groupby import Grouper
  File "/home/moose/.local/lib/python3.6/site-packages/pandas/core/groupby/__init__.py", line 2, in <module>
    from pandas.core.groupby.groupby import (
  File "/home/moose/.local/lib/python3.6/site-packages/pandas/core/groupby/groupby.py", line 49, in <module>
    from pandas.core.frame import DataFrame
  File "/home/moose/.local/lib/python3.6/site-packages/pandas/core/frame.py", line 74, in <module>
    from pandas.core.series import Series
  File "/home/moose/.local/lib/python3.6/site-packages/pandas/core/series.py", line 80, in <module>
    import pandas.plotting._core as gfx
  File "/home/moose/.local/lib/python3.6/site-packages/pandas/plotting/__init__.py", line 11, in <module>
    from pandas.plotting._core import boxplot
  File "/home/moose/.local/lib/python3.6/site-packages/pandas/plotting/_core.py", line 45, in <module>
    from pandas.plotting import _converter
  File "/home/moose/.local/lib/python3.6/site-packages/pandas/plotting/_converter.py", line 8, in <module>
    import matplotlib.units as units
  File "/home/moose/.local/lib/python3.6/site-packages/matplotlib/__init__.py", line 131, in <module>
    from matplotlib.rcsetup import defaultParams, validate_backend, cycler
  File "/home/moose/.local/lib/python3.6/site-packages/matplotlib/rcsetup.py", line 29, in <module>
    from matplotlib.fontconfig_pattern import parse_fontconfig_pattern
  File "/home/moose/.local/lib/python3.6/site-packages/matplotlib/fontconfig_pattern.py", line 22, in <module>
    from pyparsing import (Literal, ZeroOrMore, Optional, Regex, StringEnd,
  File "/home/moose/.local/lib/python3.6/site-packages/pyparsing.py", line 943, in <module>
    collections.MutableMapping.register(ParseResults)
  File "/usr/lib/python3.6/abc.py", line 158, in register
    if issubclass(subclass, cls):
  File "/usr/lib/python3.6/abc.py", line 228, in __subclasscheck__
    if issubclass(subclass, scls):
  File "/usr/lib/python3.6/abc.py", line 228, in __subclasscheck__
    if issubclass(subclass, scls):
  File "/usr/lib/python3.6/typing.py", line 1154, in __subclasscheck__
    return super().__subclasscheck__(cls)
  File "/usr/lib/python3.6/abc.py", line 209, in __subclasscheck__
    ok = cls.__subclasshook__(subclass)
  File "/usr/lib/python3.6/typing.py", line 884, in __extrahook__
    if issubclass(subclass, scls):
  File "/usr/lib/python3.6/typing.py", line 1154, in __subclasscheck__
    return super().__subclasscheck__(cls)
  File "/usr/lib/python3.6/abc.py", line 209, in __subclasscheck__
    ok = cls.__subclasshook__(subclass)
  File "/usr/lib/python3.6/typing.py", line 884, in __extrahook__
[...]
  File "/usr/lib/python3.6/typing.py", line 884, in __extrahook__
    if issubclass(subclass, scls):
  File "/usr/lib/python3.6/abc.py", line 206, in __subclasscheck__
    elif subclass in cls._abc_negative_cache:
  File "/usr/lib/python3.6/_weakrefset.py", line 75, in __contains__
    return wr in self.data
RecursionError: maximum recursion depth exceeded in comparison

======================================================================
错误：test\u pd（unittest.loader.\u失败测试）
----------------------------------------------------------------------
导入错误：导入测试模块失败：测试\u pd
回溯（最近一次呼叫最后一次）：
文件“/usr/lib/python3.6/unittest/loader.py”，第428行，在查找测试路径中
module=self.\u从\u name（name）获取\u module\u
文件“/usr/lib/python3.6/unittest/loader.py”，第369行，在“从”name“获取”模块中
__导入（名称）
文件“/home/moose/GitHub/mpu/tests/test_pd.py”，第8行，在
从mpu.pd导入示例
文件“/home/moose/GitHub/mpu/mpu/pd.py”，第10行，在
作为pd进口熊猫
文件“/home/moose/.local/lib/python3.6/site packages/pandas/_init__.py”，第42行，在
从pandas.core.api导入*
文件“/home/moose/.local/lib/python3.6/site packages/pandas/core/api.py”，第10行，在
从pandas.core.groupby.groupby导入石斑鱼
文件“/home/moose/.local/lib/python3.6/site packages/pandas/core/groupby/_init__.py”，第2行，在
从pandas.core.groupby.groupby导入(
文件“/home/moose/.local/lib/python3.6/site packages/pandas/core/groupby/groupby.py”，第49行，在
从pandas.core.frame导入数据帧
文件“/home/moose/.local/lib/python3.6/site packages/pandas/core/frame.py”，第74行，在
从pandas.core.series导入系列
文件“/home/moose/.local/lib/python3.6/site packages/pandas/core/series.py”，第80行，在
导入pandas.plotting.\u核心为gfx
文件“/home/moose/.local/lib/python3.6/site packages/pandas/plotting/__init__.py”，第11行，在
从pandas.plotting.\u核心导入箱线图
文件“/home/moose/.local/lib/python3.6/site packages/pandas/plotting/_core.py”，第45行，在
从pandas.plotting导入\u转换器
文件“/home/moose/.local/lib/python3.6/site packages/pandas/plotting/_converter.py”，第8行，在
将matplotlib.units作为单位导入
文件“/home/moose/.local/lib/python3.6/site packages/matplotlib/_init__.py”，第131行，在
从matplotlib.rcsetup导入默认参数，验证后端，循环
文件“/home/moose/.local/lib/python3.6/site packages/matplotlib/rcsetup.py”，第29行，在
从matplotlib.fontconfig_模式导入解析_fontconfig_模式
文件“/home/moose/.local/lib/python3.6/site packages/matplotlib/fontconfig_pattern.py”，第22行，在
从pyparsing导入（Literal、ZeroOrMore、Optional、Regex、StringEnd、，
文件“/home/moose/.local/lib/python3.6/site packages/pyparsing.py”，第943行，在
collections.MutableMapping.register（ParseResults）
文件“/usr/lib/python3.6/abc.py”，第158行，在寄存器中
如果为ISSUB类（子类，cls）：
文件“/usr/lib/python3.6/abc.py”，第228行，在子检查中__
如果发布类（子类，SCL）：
文件“/usr/lib/python3.6/abc.py”，第228行，在子检查中__
如果发布类（子类，SCL）：
文件“/usr/lib/python3.6/typing.py”，第1154行，在子检查中__
返回super（）。\uuuu子项检查（cls）
文件“/usr/lib/python3.6/abc.py”，第209行，在子检查中__
ok=cls.\子类钩子类（子类）
文件“/usr/lib/python3.6/typing.py”，第884行，在__
如果发布类（子类，SCL）：
文件“/usr/lib/python3.6/typing.py”，第1154行，在子检查中__
返回super（）。\uuuu子项检查（cls）
文件“/usr/lib/python3.6/abc.py”，第209行，在子检查中__
ok=cls.\子类钩子类（子类）
文件“/usr/lib/python3.6/typing.py”，第884行，在__
[...]
文件“/usr/lib/python3.6/typing.py”，第884行，在__
如果发布类（子类，SCL）：
文件“/usr/lib/python3.6/abc.py”，第206行，在子检查中__
cls.\u abc\u负\u缓存中的elif子类：
文件“/usr/lib/python3.6/_-weakrefset.py”，第75行，包含__
在self.data中返回wr
RecursionError:比较中超出了最大递归深度

我假设您已经安装了

pytest-cov

。在这种情况下，附加覆盖范围相当简单。您只需将

--cov-append

添加到

[tool:pytest].addopts

部分

[tool:pytest]
addopts = tests/ --doctest-modules --cov=./mpu --cov-append --cov-report html:tests/reports/coverage-html --cov-report xml:tests/reports/coverage.xml --pep8 --ignore=docs/
doctest_encoding = utf-8

---

这将把多个测试运行的覆盖率结合在一起。如果您拆分集成/单元测试，这也很有帮助。

这个问题解决了吗？最后一节不清楚。您能澄清一下吗？不，它没有解决。我只是发现

--并行模式

必须在setup.py之前，这让人感到困惑，我想记下它。也许我应该从问题中删除这一部分。看看这个repo是否有任何帮助？啊，好吧，这是另一种方式。但我希望我可以用tox来完成。我更喜欢用

tox

作为执行所有与测试相关的命令。我认为模式是

begin，py{…}，end

适用于此，但我不明白为什么/如何导致

错误：InvocationError

虽然我很欣赏您的答案（+1），但它似乎无法解决问题。请参阅我添加到问题中的错误。@Martintoma您发布的错误与

--cov append

选项无关-出于某种原因，测试是使用

unittest

而不是

pytest

运行的。您一定更改了其他原因。请添加您是如何发现

unittest

是问题的。我可以现在就开始：我直接呼叫了

coverage

，而不是使用

pytest

，让

pytest cov

呼叫coverage。谢谢！

======================================================================
ERROR: test_pd (unittest.loader._FailedTest)
----------------------------------------------------------------------
ImportError: Failed to import test module: test_pd
Traceback (most recent call last):
  File "/usr/lib/python3.6/unittest/loader.py", line 428, in _find_test_path
    module = self._get_module_from_name(name)
  File "/usr/lib/python3.6/unittest/loader.py", line 369, in _get_module_from_name
    __import__(name)
  File "/home/moose/GitHub/mpu/tests/test_pd.py", line 8, in <module>
    from mpu.pd import example_df
  File "/home/moose/GitHub/mpu/mpu/pd.py", line 10, in <module>
    import pandas as pd
  File "/home/moose/.local/lib/python3.6/site-packages/pandas/__init__.py", line 42, in <module>
    from pandas.core.api import *
  File "/home/moose/.local/lib/python3.6/site-packages/pandas/core/api.py", line 10, in <module>
    from pandas.core.groupby.groupby import Grouper
  File "/home/moose/.local/lib/python3.6/site-packages/pandas/core/groupby/__init__.py", line 2, in <module>
    from pandas.core.groupby.groupby import (
  File "/home/moose/.local/lib/python3.6/site-packages/pandas/core/groupby/groupby.py", line 49, in <module>
    from pandas.core.frame import DataFrame
  File "/home/moose/.local/lib/python3.6/site-packages/pandas/core/frame.py", line 74, in <module>
    from pandas.core.series import Series
  File "/home/moose/.local/lib/python3.6/site-packages/pandas/core/series.py", line 80, in <module>
    import pandas.plotting._core as gfx
  File "/home/moose/.local/lib/python3.6/site-packages/pandas/plotting/__init__.py", line 11, in <module>
    from pandas.plotting._core import boxplot
  File "/home/moose/.local/lib/python3.6/site-packages/pandas/plotting/_core.py", line 45, in <module>
    from pandas.plotting import _converter
  File "/home/moose/.local/lib/python3.6/site-packages/pandas/plotting/_converter.py", line 8, in <module>
    import matplotlib.units as units
  File "/home/moose/.local/lib/python3.6/site-packages/matplotlib/__init__.py", line 131, in <module>
    from matplotlib.rcsetup import defaultParams, validate_backend, cycler
  File "/home/moose/.local/lib/python3.6/site-packages/matplotlib/rcsetup.py", line 29, in <module>
    from matplotlib.fontconfig_pattern import parse_fontconfig_pattern
  File "/home/moose/.local/lib/python3.6/site-packages/matplotlib/fontconfig_pattern.py", line 22, in <module>
    from pyparsing import (Literal, ZeroOrMore, Optional, Regex, StringEnd,
  File "/home/moose/.local/lib/python3.6/site-packages/pyparsing.py", line 943, in <module>
    collections.MutableMapping.register(ParseResults)
  File "/usr/lib/python3.6/abc.py", line 158, in register
    if issubclass(subclass, cls):
  File "/usr/lib/python3.6/abc.py", line 228, in __subclasscheck__
    if issubclass(subclass, scls):
  File "/usr/lib/python3.6/abc.py", line 228, in __subclasscheck__
    if issubclass(subclass, scls):
  File "/usr/lib/python3.6/typing.py", line 1154, in __subclasscheck__
    return super().__subclasscheck__(cls)
  File "/usr/lib/python3.6/abc.py", line 209, in __subclasscheck__
    ok = cls.__subclasshook__(subclass)
  File "/usr/lib/python3.6/typing.py", line 884, in __extrahook__
    if issubclass(subclass, scls):
  File "/usr/lib/python3.6/typing.py", line 1154, in __subclasscheck__
    return super().__subclasscheck__(cls)
  File "/usr/lib/python3.6/abc.py", line 209, in __subclasscheck__
    ok = cls.__subclasshook__(subclass)
  File "/usr/lib/python3.6/typing.py", line 884, in __extrahook__
[...]
  File "/usr/lib/python3.6/typing.py", line 884, in __extrahook__
    if issubclass(subclass, scls):
  File "/usr/lib/python3.6/abc.py", line 206, in __subclasscheck__
    elif subclass in cls._abc_negative_cache:
  File "/usr/lib/python3.6/_weakrefset.py", line 75, in __contains__
    return wr in self.data
RecursionError: maximum recursion depth exceeded in comparison

[tool:pytest]
addopts = tests/ --doctest-modules --cov=./mpu --cov-append --cov-report html:tests/reports/coverage-html --cov-report xml:tests/reports/coverage.xml --pep8 --ignore=docs/
doctest_encoding = utf-8