{"id":13503,"date":"2024-03-15T07:14:51","date_gmt":"2024-03-15T07:14:51","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-package-python-as-a-dynamic-link-library\/"},"modified":"2025-08-05T19:22:04","modified_gmt":"2025-08-05T19:22:04","slug":"how-to-package-python-as-a-dynamic-link-library","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-package-python-as-a-dynamic-link-library\/","title":{"rendered":"How to Create a Python DLL: Complete Guide"},"content":{"rendered":"

In Python, you can utilize tools such as Cython or ctypes to wrap Python code into a Dynamic Link Library (DLL).<\/p>\n

    \n
  1. Wrap with Cython as a dynamic link library.<\/li>\n
  2. Install Cython by running “pip install cython” in the command line.<\/li>\n
  3. Create a .pyx file and write the Python code that needs to be encapsulated.<\/li>\n
  4. Create a setup.py file to build and compile Cython code.<\/li>\n
  5. Compile Cython code and generate dynamic linking library files by running python setup.py build_ext –inplace in the command line.<\/li>\n
  6. Wrap using ctypes as a dynamic library:<\/li>\n
  7. In Python, the ctypes library can be used to directly load and invoke dynamic link libraries.<\/li>\n
  8. Wrap Python code into a dynamic link library: save the code as a .py file, then use the find_library function from the ctypes.util module to find and load the dynamic link library.<\/li>\n
  9. Load and invoke dynamic link libraries: Load the dynamic link library using the ctypes.cdll.LoadLibrary function, and then make function calls using the loaded library.<\/li>\n<\/ol>\n

    Below is an example of wrapping with Cython into a dynamic link library.<\/p>\n

      \n
    1. .pyx file<\/li>\n
    2. example.pyx – a demonstration file in the PYX format<\/li>\n<\/ol>\n
      def<\/span> add<\/span>(a, b<\/span>):\r\n    return<\/span> a + b\r\n<\/code><\/pre>\n
        \n
      1. configuration file for Python package installation<\/li>\n<\/ol>\n
        from<\/span> distutils.core import<\/span> setup\r\nfrom<\/span> Cython.Build import<\/span> cythonize\r\n\r\nsetup(\r\n    ext_modules=cythonize(\"example.pyx\"<\/span>)\r\n)\r\n<\/code><\/pre>\n
          \n
        1. Compile the Python code in the current directory and place the extension modules in the same location.<\/li>\n<\/ol>\n
          Now you can load and call this dynamic link library in other Python programs.<\/p>\n
          import<\/span> example\r\n\r\nresult = example.add(3<\/span>, 4<\/span>)\r\nprint<\/span>(result)  # \u8f93\u51fa: 7<\/span>\r\n<\/code><\/pre>\n
          In this way, you have successfully packaged your Python code into a dynamic link library, allowing it to be used in other Python programs.<\/p>\n","protected":false},"excerpt":{"rendered":"
          In Python, you can utilize tools such as Cython or ctypes to wrap Python code into a Dynamic Link Library (DLL). Wrap with Cython as a dynamic link library. Install Cython by running “pip install cython” in the command line. Create a .pyx file and write the Python code that needs to be encapsulated. Create […]<\/p>\n","protected":false},"author":13,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[18011,18008,18010,18007,18009],"class_list":["post-13503","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-ctypes","tag-cython","tag-dynamic-link-library","tag-python-dll","tag-python-packaging"],"yoast_head":"\nHow to Create a Python DLL: Complete Guide - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn how to package Python code as a dynamic link library (DLL) using Cython or ctypes. 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