eclipse - 安装 pySDL2 后 SDL2 的运行时错误

Question

我通过以下方式安装了 pySDL2 0.4.1:

下载源码包，输入 python setup.py install。然后我尝试运行复制粘贴到 PyDev eclipse“The Pong Game:Getting Started”教程代码示例:

导入操作系统、系统

try:
    os.environ["PYSDL2_DLL_PATH"] = "/home/me/workspace/Pong/third-party"
    print(os.getenv("PYSDL2_DLL_PATH"))
    from sdl2 import events, SDL_QUIT
    import sdl2.ext as sdl2ext
except ImportError:
    import traceback
    traceback.print_exc()
    sys.exit(1)

def run():
    sdl2ext.init()
    window = sdl2ext.Window("The Pong Game", size=(800, 600))
    window.show()
    running = True
    while running:
        events = sdl2ext.get_events()
        for event in events:
            if event.type == SDL_QUIT:
                running = False
                break
        window.refresh()
    return 0

if __name__ == "__main__":
    sys.exit(run())

我收到以下错误:

Traceback (most recent call last):
  File "/home/me/workspace/Pong/Main.py", line 11, in <module>
    from sdl2 import *
  File "/usr/local/lib/python3.3/dist-packages/sdl2/__init__.py", line 2, in <module>
    from .dll import get_dll_file, _bind
  File "/usr/local/lib/python3.3/dist-packages/sdl2/dll.py", line 90, in <module>
    dll = _DLL("SDL2", ["SDL2", "SDL2-2.0"], os.getenv("PYSDL2_DLL_PATH"))
  File "/usr/local/lib/python3.3/dist-packages/sdl2/dll.py", line 51, in __init__
    raise RuntimeError("could not find any library for %s" % libinfo)
RuntimeError: could not find any library for SDL2

我通过 Synaptic 安装了 Pypy 和 libSDL，并且没有在 PyDev - PythonPath 中添加任何外部库。

我做错了什么？

Answer 1

您的 PySDL2 似乎没有找到 SDL2 运行时库。它们在 libsdl 上可用 download page (Linux 除外)。

然后您应该通过设置 PYSDL2_DLL_PATH 让 PySDL2 位于库所在的位置，如下所示:

# Win32 platforms
set PYSDL2_DLL_PATH=C:\path\to\fancy_project\third_party

# Unix/Posix-alike environments - bourne shells
export PYSDL2_DLL_PATH=/path/to/fancy_project/third_party

# Unix/Posix-alike environments - C shells
setenv PYSDL2_DLL_PATH /path/to/fancy_project/third_party

或在 python 脚本中:

# Win32 Platform path
os.environ["PYSDL2_DLL_PATH"] = "C:\\path\\to\\fancy_project\\third_party"
# Unix/Posix-alike environments path
os.environ["PYSDL2_DLL_PATH"] = "/path/to/fancy_project/third_party"

这样，PySDL2 将始终找到库文件(当然只要路径正确)!在我看来，这似乎是更简单的方法。

祝您使用 SDL2 编码愉快!