python sys模块包含了与python解释器和它的环境有关的函数,这个你可以通过dir(sys)来查看他里面的方法和成员属性
代码如下:
import sysprint dir(sys)
result:
代码如下:
[‘__displayhook__’, ‘__doc__’, ‘__excepthook__’, ‘__name__’, ‘__package__’, ‘__stderr__’, ‘__stdin__’, ‘__stdout__’, ‘_clear_type_cache’, ‘_current_frames’, ‘_getframe’, ‘_mercurial’, ‘api_version’, ‘argv’, ‘builtin_module_names’, ‘byteorder’, ‘call_tracing’, ‘callstats’, ‘copyright’, ‘displayhook’, ‘dllhandle’, ‘dont_write_bytecode’, ‘exc_clear’, ‘exc_info’, ‘exc_type’, ‘excepthook’, ‘exec_prefix’, ‘executable’, ‘exit’, ‘flags’, ‘float_info’, ‘float_repr_style’, ‘getcheckinterval’, ‘getdefaultencoding’, ‘getfilesystemencoding’, ‘getprofile’, ‘getrecursionlimit’, ‘getrefcount’, ‘getsizeof’, ‘gettrace’, ‘getwindowsversion’, ‘hexversion’, ‘long_info’, ‘maxint’, ‘maxsize’, ‘maxunicode’, ‘meta_path’, ‘modules’, ‘path’, ‘path_hooks’, ‘path_importer_cache’, ‘platform’, ‘prefix’, ‘py3kwarning’, ‘setcheckinterval’, ‘setprofile’, ‘setrecursionlimit’, ‘settrace’, ‘stderr’, ‘stdin’, ‘stdout’, ‘subversion’, ‘version’, ‘version_info’, ‘warnoptions’, ‘winver’]
代码如下:
import sysprint sys.pathresult:[‘c:\\documents and settings\\username\\my documents\\aptana studio 3 workspace\\python_test_project\\src’, ‘c:\\documents and settings\\username\\my documents\\aptana studio 3 workspace\\python_test_project\\src’, ‘c:\\python27’, ‘c:\\python27\\dlls’, ‘c:\\python27\\lib’, ‘c:\\python27\\lib\\lib-tk’, ‘c:\\python27\\lib\\plat-win’, ‘c:\\python27\\lib\\site-packages’, ‘c:\\python27\\lib\\site-packages\\wx-2.8-msw-unicode’, ‘c:\\windows\\system32\\python27.zip’]
里面有个 sys.path属性。他是一个list.默然情况下python导入文件或者模块的话，他会先在sys.path里找模块的路径。如果没有的话，程序就会报错。所以我们一般自己写程序的话。最好把自己的模块路径给加到当前模块扫描的路径里,eg: sys.path.append(‘你的模块的名称’),这样程序就不会因为找不到模块而报错。。