标签：osi 交互模式 ecs test 参数 解释 信息 ini data
python的sys模块为开发者提供了访问由解释器使用或维护的接口，并提供了一些函数用来和解释器进行交互，操控python的运行环境
下面将介绍sys模块常用的属性和方法
功能：在程序外部（命令行）向内部传递参数；其中sys.argv[0]是脚本名称
脚本：test.py
import sys print("sys.argv[0]") print("sys.argv[1]") >>python test.py argv test.py argv
功能：模块的搜索路径；sys.path[0]表示当前脚本所在目录，在交互模式下sys.path[0]为空字符；自定义脚本放在sys.path列表中的任何一个目录下就可以通过import导入使用
脚本：test.py
import sys print(sys.path) >>python test.py [‘/box‘, ‘/usr/local/python-3.6.0/lib/python36.zip‘, ‘/usr/local/python-3.6.0/lib/python3.6‘, ‘/usr/local/python-3.6.0/lib/python3.6/lib-dynload‘, ‘/usr/local/python-3.6.0/lib/python3.6/site-packages‘]
功能：一个全局字典，python启动后就将该字典加载到内存中，每导入一个新模块，都会被记录在这个字典中，第二次导入相同模块时，解释器将直接查找字典，从而加快程序运行的速度
脚本：test.py
import sys print(sys.modules) >>python test.py {‘builtins‘: <module ‘builtins‘ (built-in)>, ‘sys‘: <module ‘sys‘ (built-in)>, ‘_frozen_importlib‘: <module ‘_frozen_importlib‘ (frozen)>, ‘_imp‘: <module ‘_imp‘ (built-in)>, ‘_warnings‘: <module ‘_warnings‘ (built-in)>, ‘_thread‘: <module ‘_thread‘ (built-in)>, ‘_weakref‘: <module ‘_weakref‘ (built-in)>, ‘_frozen_importlib_external‘: <module ‘_frozen_importlib_external‘ (frozen)>, ‘_io‘: <module ‘io‘ (built-in)>, ‘marshal‘: <module ‘marshal‘ (built-in)>, ‘posix‘: <module ‘posix‘ (built-in)>, ‘zipimport‘: <module ‘zipimport‘ (built-in)>, ‘encodings‘: <module ‘encodings‘ from ‘/usr/local/python-3.6.0/lib/python3.6/encodings/__init__.py‘>, ‘codecs‘: <module ‘codecs‘ from ‘/usr/local/python-3.6.0/lib/python3.6/codecs.py‘>, ‘_codecs‘: <module ‘_codecs‘ (built-in)>, ‘encodings.aliases‘: <module ‘encodings.aliases‘ from ‘/usr/local/python-3.6.0/lib/python3.6/encodings/aliases.py‘>, ‘encodings.utf_8‘: <module ‘encodings.utf_8‘ from ‘/usr/local/python-3.6.0/lib/python3.6/encodings/utf_8.py‘>, ‘_signal‘: <module ‘_signal‘ (built-in)>, ‘__main__‘: <module ‘__main__‘ from ‘main.py‘>, ‘encodings.latin_1‘: <module ‘encodings.latin_1‘ from ‘/usr/local/python-3.6.0/lib/python3.6/encodings/latin_1.py‘>, ‘io‘: <module ‘io‘ from ‘/usr/local/python-3.6.0/lib/python3.6/io.py‘>, ‘abc‘: <module ‘abc‘ from ‘/usr/local/python-3.6.0/lib/python3.6/abc.py‘>, ‘_weakrefset‘: <module ‘_weakrefset‘ from ‘/usr/local/python-3.6.0/lib/python3.6/_weakrefset.py‘>, ‘_bootlocale‘: <module ‘_bootlocale‘ from ‘/usr/local/python-3.6.0/lib/python3.6/_bootlocale.py‘>, ‘_locale‘: <module ‘_locale‘ (built-in)>, ‘site‘: <module ‘site‘ from ‘/usr/local/python-3.6.0/lib/python3.6/site.py‘>, ‘os‘: <module ‘os‘ from ‘/usr/local/python-3.6.0/lib/python3.6/os.py‘>, ‘errno‘: <module ‘errno‘ (built-in)>, ‘stat‘: <module ‘stat‘ from ‘/usr/local/python-3.6.0/lib/python3.6/stat.py‘>, ‘_stat‘: <module ‘_stat‘ (built-in)>, ‘posixpath‘: <module ‘posixpath‘ from ‘/usr/local/python-3.6.0/lib/python3.6/posixpath.py‘>, ‘genericpath‘: <module ‘genericpath‘ from ‘/usr/local/python-3.6.0/lib/python3.6/genericpath.py‘>, ‘os.path‘: <module ‘posixpath‘ from ‘/usr/local/python-3.6.0/lib/python3.6/posixpath.py‘>, ‘_collections_abc‘: <module ‘_collections_abc‘ from ‘/usr/local/python-3.6.0/lib/python3.6/_collections_abc.py‘>, ‘_sitebuiltins‘: <module ‘_sitebuiltins‘ from ‘/usr/local/python-3.6.0/lib/python3.6/_sitebuiltins.py‘>, ‘sysconfig‘: <module ‘sysconfig‘ from ‘/usr/local/python-3.6.0/lib/python3.6/sysconfig.py‘>, ‘_sysconfigdata_m_linux_x86_64-linux-gnu‘: <module ‘_sysconfigdata_m_linux_x86_64-linux-gnu‘ from ‘/usr/local/python-3.6.0/lib/python3.6/_sysconfigdata_m_linux_x86_64-linux-gnu.py‘>}
功能：返回值为一个包含异常类型、异常实例和异常回溯信息的元组
脚本：test.py
import sys a = "abc" try: int(a) except: exc_type, exc_value, exc_traceback = sys.exc_info() print(exc_type) print(exc_value) print(exc_traceback) >>python test.py <class ‘ValueError‘> invalid literal for int() with base 10: ‘abc‘ <traceback object at 0x7feb61a92dc8>
功能：返回最近一次捕获的异常的类型，只在交互式环境下可用
功能：返回最近一次捕获的异常的值，只在交互式环境下可用
功能：返回最近一次捕获的异常的追踪信息，只在交互式环境下可用
标签：osi 交互模式 ecs test 参数 解释 信息 ini data
原文地址：https://www.cnblogs.com/xmcwm/p/12246141.html
