[英]Python3 reload project that use python c-api
I have a project that I built for it a Class in C (python c-api) which I extended more in the python project.我有一个项目,我为它构建了一个 C 类(python c-api),我在 python 项目中扩展了更多。 The project's purpose is to provide a test framework for a C library.
该项目的目的是为 C 库提供一个测试框架。 The test is mainly executed for each pull request of the C library.
测试主要针对C库的每个pull request执行。
The project needs to download form a Nexus server the relevant build of the C library, Compile the python class that is dependent on the C library, then to perform the tests.项目需要从Nexus服务器下载C库的相关构建,编译依赖于C库的python类,然后进行测试。
The Problem : import / reload the project modules after the compilation of C code.问题:在编译 C 代码后导入/重新加载项目模块。
The Question : In my opinion, it's not that elegant to do import in each function that depends on the C library, So I tried to invoke reload, but it seems that it doesn't work, or at least not as I expecting.问题:在我看来,在依赖于 C 库的每个函数中进行导入并不是那么优雅,所以我试图调用 reload,但它似乎不起作用,或者至少不像我期望的那样。
Code The code is super-simplified to illustrate the issue, you can check this thread history to see the previous code.代码为了说明问题,代码超级简化,您可以查看此线程历史记录以查看之前的代码。
main.py
from utils.my_custom_py import MyCustomExtended
from importlib.util import find_spec
from importlib import reload
from os import system, stat
import weakref
import sys
def setup():
if system('./setup.py clean build install') > 0:
raise SystemError("Failed to setup python c-api extention class")
def main():
if find_spec('custom2') is None:
setup()
for module_name in list(sys.modules.keys()):
m = sys.modules.get(module_name)
if not hasattr(m, '__file__'):
continue
if getattr(m, '__name__', None) in [None, '__mp_main__', '__main__']:
continue
try:
# superreload(m) # from ==> IPython.extensions
# sys.modules[module_name] = reload(m)
reload(m)
except Exception as e:
...
MyCustomExtended(1, 2, 3)
print("COOL")
if __name__ == "__main__":
main()
utils.my_custom_py.py
from importlib.util import find_spec
if find_spec('custom2'):
import custom2
else:
class custom2:
class Custom:
...
class MyCustomExtended(custom2.Custom):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
setup.py
from distutils.core import Extension, setup
custom_ext = Extension("custom2", ["src/custom.c"])
setup(name="custom2", version="1.0", ext_modules=[custom_ext])
src.custom.c
is taken from: docs.python.org src.custom.c
取自: docs.python.org
The error output :错误输出:
running clean
running build
running build_ext
building 'custom2' extension
creating build
creating build/temp.linux-x86_64-3.6
creating build/temp.linux-x86_64-3.6/src
x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -I/tmp/PlayAround/.venv/include -I/usr/include/python3.6m -c src/custom.c -o build/temp.linux-x86_64-3.6/src/custom.o
creating build/lib.linux-x86_64-3.6
x86_64-linux-gnu-gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-Bsymbolic-functions -Wl,-z,relro -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 build/temp.linux-x86_64-3.6/src/custom.o -o build/lib.linux-x86_64-3.6/custom2.cpython-36m-x86_64-linux-gnu.so
running install
running install_lib
copying build/lib.linux-x86_64-3.6/custom2.cpython-36m-x86_64-linux-gnu.so -> /tmp/PlayAround/.venv/lib/python3.6/site-packages
running install_egg_info
Removing /tmp/PlayAround/.venv/lib/python3.6/site-packages/custom2-1.0.egg-info
Writing /tmp/PlayAround/.venv/lib/python3.6/site-packages/custom2-1.0.egg-info
Traceback (most recent call last):
File "./main.py", line 38, in <module>
main()
File "./main.py", line 33, in main
MyCustomExtended(1, 2, 3)
File "/tmp/PlayAround/utils/my_custom_py.py", line 12, in __init__
super().__init__(*args, **kwargs)
TypeError: object.__init__() takes no parameters
main that work :主要工作:
from importlib.util import find_spec
from importlib import reload
from os import system, stat
import weakref
import sys
def setup():
if system('./setup.py clean build install') > 0:
raise SystemError("Failed to setup python c-api extention class")
def main():
if find_spec('custom2') is None:
setup()
from utils.my_custom_py import MyCustomExtended
MyCustomExtended(1, 2, 3)
print("COOL")
if __name__ == "__main__":
main()
Finally, I found the solution by trial and error.最后,我通过反复试验找到了解决方案。 for this example code id did the following:
对于此示例代码 id 执行以下操作:
from utils.my_custom_py import MyCustomExtended
from importlib.util import find_spec
from importlib import reload
from sys import modules
from os import system
def setup():
if system('./setup.py clean build install') > 0:
raise SystemError("Failed to setup python c-api extention class")
def reload_my_libs():
global MyCustomExtended
reload(modules['utils'])
reload(modules['utils.my_custom_py'])
from utils.my_custom_py import MyCustomExtended
def main():
if find_spec('custom2') is None:
setup()
reload_my_libs()
MyCustomExtended(1, 2, 3)
print("COOL")
if __name__ == "__main__":
main()
as a result, I got:结果,我得到了:
running clean
running build
running build_ext
building 'custom2' extension
creating build
creating build/temp.linux-x86_64-3.6
creating build/temp.linux-x86_64-3.6/src
x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -I/tmp/PlayAround/.venv/include -I/usr/include/python3.6m -c src/custom.c -o build/temp.linux-x86_64-3.6/src/custom.o
creating build/lib.linux-x86_64-3.6
x86_64-linux-gnu-gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-Bsymbolic-functions -Wl,-z,relro -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 build/temp.linux-x86_64-3.6/src/custom.o -o build/lib.linux-x86_64-3.6/custom2.cpython-36m-x86_64-linux-gnu.so
running install
running install_lib
copying build/lib.linux-x86_64-3.6/custom2.cpython-36m-x86_64-linux-gnu.so -> /tmp/PlayAround/.venv/lib/python3.6/site-packages
running install_egg_info
Removing /tmp/PlayAround/.venv/lib/python3.6/site-packages/custom2-1.0.egg-info
Writing /tmp/PlayAround/.venv/lib/python3.6/site-packages/custom2-1.0.egg-info
COOL
It also worked for my previous question version, which was way more complicated.它也适用于我以前的问题版本,这要复杂得多。
regardless, thanks for the effort to help :)无论如何,感谢您的帮助:)
Besides the various minor issues in your code, you are also trying to reload all the modules in existence while silently swallowing errors.除了代码中的各种小问题外,您还试图重新加载所有存在的模块,同时默默地吞下错误。 Reloading the utils module works as expected:
重新加载 utils 模块按预期工作:
import utils
from importlib.util import find_spec
from importlib import reload
from os import system, stat
import weakref
import sys
def setup():
if system('python3 setup.py clean build install') > 0:
raise SystemError("Failed to setup python c-api extention class")
def main():
if find_spec('custom2') is None:
setup()
for module_name in list(sys.modules.keys()):
m = sys.modules.get(module_name)
if not hasattr(m, '__file__'):
continue
if getattr(m, '__name__', None) in [None, '__mp_main__', '__main__']:
continue
reload(utils)
MyCustomExtended = utils.MyCustomExtended
print(MyCustomExtended)
MyCustomExtended(1, 2, 3)
print("COOL")
if __name__ == "__main__":
main()
I suggest you only reload modules that are part of your application.我建议您只重新加载属于您的应用程序的模块。
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