1. To compile 64-bit GCC, select the mingw64 compiler.
Download address: https://sourceforge.net/projects/mingw-w64/, click Download directly, and then configure environment variables (the easiest and most trouble-free pro-test)
Compile command: gcc -m64 ./xx/xxx.c (path) ./xx/xxxx.c (path) -fPIC -shared -o xx.dll
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How to judge whether the compiled .dll file is 32-bit or 64-bit?
Open the exe file (dll file) directly with Notepad or notepad++, there will be a lot of garbled characters, then you only need to find the two letters PE in the second paragraph, and d or L will appear not far behind. If it is d, it proves that the program is 64-bit; if it is L, it proves that it is 32-bit
3. Possible errors: [WinError 193] %1 is not a valid Win32 application!
这个第一种可能是python程序是32位的，.dll是64位的。第二种可能是编译出来的.dll文件是32位的，python是64位的，俩者的版本不同。
解决方法：打开cmd，输入where python，会出现python目录，cd到该目录下，命令行输入python，进去会有显示是32位的还是64位的，如果是32位的，卸载重装