Linux command
ctypes 命令
文本
涉及管道、覆盖或删除，执行前请先确认路径和参数。
常用示例
Load a shared library
python -c "from ctypes import CDLL; lib = CDLL('[libname.so]')"
Call a C function
python -c "from ctypes import CDLL; lib = CDLL('libc.so.6'); print(lib.getpid())"
Pass string argument to C function
python -c "from ctypes import CDLL, c_char_p; lib = CDLL('libc.so.6'); lib.puts(c_char_p(b'Hello'))"
Define function argument and return types
python -c "from ctypes import CDLL, c_int; lib = CDLL('libm.so.6'); lib.abs.argtypes = [c_int]; lib.abs.restype = c_int; print(lib.abs(-42))"
Access Windows DLL
python -c "from ctypes import windll; windll.user32.MessageBoxW(0, 'Hello', 'Title', 0)"
说明
ctypes is a Python standard library module for calling functions in C shared libraries and DLLs. It provides C-compatible data types and allows calling functions with appropriate argument and return type specifications. The module enables Python code to interface with native libraries without writing C extension modules. It handles type conversion between Python and C, pointer management, and structure/union definitions. Common uses include accessing system libraries, using hardware interfaces, integrating legacy C code, and calling platform-specific APIs (Windows DLLs, macOS frameworks).
FAQ
What is the ctypes command used for?
ctypes is a Python standard library module for calling functions in C shared libraries and DLLs. It provides C-compatible data types and allows calling functions with appropriate argument and return type specifications. The module enables Python code to interface with native libraries without writing C extension modules. It handles type conversion between Python and C, pointer management, and structure/union definitions. Common uses include accessing system libraries, using hardware interfaces, integrating legacy C code, and calling platform-specific APIs (Windows DLLs, macOS frameworks).
How do I run a basic ctypes example?
Run `python -c "from ctypes import CDLL; lib = CDLL('[libname.so]')"` in a terminal, then adjust file names, paths, flags, or remote targets for your system.
Where can I find more ctypes examples?
This page includes 5 examples for ctypes, plus related commands for nearby Linux tasks.