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。该项目的目的是为 C 库提供测试框架。测试主要针对 C 库的每个 pull request 执行。
项目需要从Nexus服务器下载C库的相关构建,编译依赖C库的python类,然后进行测试。
问题 :在C代码编译后导入/重新加载项目模块。
问题 : 在我看来,在依赖于 C 库的每个函数中进行 import 并不是那么优雅,所以我尝试调用 reload,但它似乎不起作用,或者至少不像我预期的那样。
代码 代码被 super 简化以说明问题,您可以查看此线程历史记录以查看以前的代码。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
取自:docs.python.org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
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()
最佳答案
最后,我通过反复试验找到了解决方案。
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()
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
它也适用于我之前的问题版本,这要复杂得多。无论如何,感谢您的帮助:)
关于使用 python c-api 的 Python3 重新加载项目,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/64863147/