def test_set_wrapper_1(self):
async def foo():
return 'spam'
wrapped = None
def wrap(gen):
nonlocal wrapped
wrapped = gen
return gen
self.assertIsNone(sys.get_coroutine_wrapper())
sys.set_coroutine_wrapper(wrap)
self.assertIs(sys.get_coroutine_wrapper(), wrap)
try:
f = foo()
self.assertTrue(wrapped)
self.assertEqual(run_async(f), ([], 'spam'))
finally:
sys.set_coroutine_wrapper(None)
self.assertIsNone(sys.get_coroutine_wrapper())
wrapped = None
with silence_coro_gc():
foo()
self.assertFalse(wrapped)
def test_get_set_coroutine_wrapper_deprecated():
import warnings
def my_wrapper(cr):
return 1
with warnings.catch_warnings(record=True) as l:
warnings.simplefilter('always', category=DeprecationWarning)
sys.get_coroutine_wrapper()
sys.set_coroutine_wrapper(my_wrapper)
sys.set_coroutine_wrapper(None)
print(l)
assert len(l) == 3
def test_set_coroutine_wrapper():
async def f():
pass
seen = []
def my_wrapper(cr):
seen.append(cr)
return 42
assert sys.get_coroutine_wrapper() is None
sys.set_coroutine_wrapper(my_wrapper)
assert sys.get_coroutine_wrapper() is my_wrapper
cr = f()
assert cr == 42
sys.set_coroutine_wrapper(None)
assert sys.get_coroutine_wrapper() is None
def set_debug(self, enabled):
self._debug = enabled
wrapper = coroutines.debug_wrapper
try:
set_wrapper = sys.set_coroutine_wrapper
except AttributeError:
pass
else:
current_wrapper = sys.get_coroutine_wrapper()
if enabled:
if current_wrapper not in (None, wrapper):
warnings.warn(
"loop.set_debug(True): cannot set debug coroutine "
"wrapper; another wrapper is already set %r" %
current_wrapper, RuntimeWarning)
else:
set_wrapper(wrapper)
else:
if current_wrapper not in (None, wrapper):
warnings.warn(
"loop.set_debug(False): cannot unset debug coroutine "
"wrapper; another wrapper was set %r" %
current_wrapper, RuntimeWarning)
else:
set_wrapper(None)
def test_set_wrapper_2(self):
self.assertIsNone(sys.get_coroutine_wrapper())
with self.assertRaisesRegex(TypeError, "callable expected, got int"):
sys.set_coroutine_wrapper(1)
self.assertIsNone(sys.get_coroutine_wrapper())
async def coroutine_wrapper_deprecated():
# set_coroutine_wrapper() and sys.get_coroutine_wrapper() will be removed in Python 3.8
sys.set_coroutine_wrapper(sys.get_coroutine_wrapper())
# and are deprecated in favor of
sys.set_coroutine_origin_tracking_depth(
sys.get_coroutine_origin_tracking_depth())
def sys_func():
lists = sys.argv # 传递给Python脚本的命令行参数列表 => python p.py -> ['p.py'] / python p.py a 1 -> ['p.py', 'a', '1'] / 程序内执行 -> ['']
strs = sys.getdefaultencoding() # 默认字符集名称
strs = sys.getfilesystemencoding() # 系统文件名字符集名称
num = sys.getrefcount(object) # 返回object的引用计数(比实际多1个)
dicts = sys.modules # 已加载的模块, 可修改, 但不能通过修改返回的字典进行修改
lists = sys.path # 模块搜索路径
sys.path.append("./test") # 动态添加模块搜索路径
strs = sys.platform # 平台标识符(系统身份进行详细的检查,推荐使用) Linux:'linux' / Windows:'win32' / Cygwin:'cygwin' / Mac OS X:'darwin'
strs = sys.version # python解释器版本
lists = sys.thread_info # 线程信息
num = sys.api_version # 解释器C API版本
types, value, back = sys.exc_info() # 捕获异常 详见 异常 文章的 excep() 代码块第二小部分(http://blog.csdn.net/rozol/article/details/69313164)
sys.excepthook(types, value, back) # 打印异常
types = sys.last_type
value = sys.last_value
back = sys.last_traceback
# sys.exit([arg]) // 引发SystemExit异常退出Python(可以try), 范围[0,127], None==0, "string"==1
sys.exit(0)
num = sys.getrecursionlimit() # 最大递归数(堆栈最大深度), 详见 函数 文章(http://blog.csdn.net/rozol/article/details/69242050)
sys.setrecursionlimit(5000) # 修改最大递归数
fnum = sys.getswitchinterval() # 获取线程切换间隔
sys.setswitchinterval(0.005) # 设置线程切换间隔, 单位秒
num = sys.getcheckinterval() # 解释器的检查间隔
sys.setcheckinterval(100) # 设置解释器检查间隔, 执行(默认)100个虚拟指令执行一次检查, 值为<=0时,检查每个虚拟指令
# sys.stdin // 标准输入流
strs = sys.stdin.readline()[:-1]
# sys.stdout // 标准出入输出
sys.stdout.write(">>")
sys.stdout.flush()
# sys.stderr // 标注错误流
sys.stderr.write(">>")
# ---
lists = sys.builtin_module_names # 所有模块 (注:非导入模块)
path = sys.base_exec_prefix # Python安装路径
path = sys.base_prefix # 同base_exec_prefix
path = sys.exec_prefix # 同base_exec_prefix
path = sys.prefix # 同base_exec_prefix
path = sys.executable # Python解释器的绝对路径
strs = ys.byteorder # 本机字节顺序指示器, big-endian(最高有效字节在第一位)值为'big', little-endian(最低有效字节在第一位)值为'little'
strs = sys.copyright # python版权
num = sys.hexversion # 16进制版本号
lists = sys.implementation # 当前运行的解释器的信息
num = sys.getallocatedblocks() # 解释器当前分配的内存块的数量
boolean = sys.dont_write_bytecode # 是否不会尝试导入源模块是写入.pyc文件 (False会写入.pyc文件)
# sys.getsizeof(object[, default]) // 返回对象的大小bit, 只计算自身内存消耗,不计算引用对象的内存消耗, 调用对象的__sizeof__(), default没有获取到默认返回值
num = sys.getsizeof(object)
boolean = sys.is_finalizing() # 解释器是否正在被关机
num = sys.maxsize # 最大整数值(2 ** 31 -1), 与系统有关
num = sys.maxunicode # 最大Unicode值的整数 (1114111)
strs = sys.ps1 # 解释器主提示符
strs = sys.ps2 # 解释器次提示符
sys.call_tracing(func, ("arg",)) # 调用函数
sys._clear_type_cache() # 清除内部类型缓存
sys._debugmallocstats() # 打印CPython内存分配器状态的低级信息
sys.setprofile(profilefunc) # 设置profile函数, 默认None
sys.getprofile() # 获取profile函数
sys.settrace(tracefunc) # 设置跟踪函数, def tracefunc(frame、event 和arg):
sys.gettrace() # 获取跟踪函数, 默认None
sys.set_coroutine_wrapper(wrapper) # 设置包装 def wrapper(coro):
sys.get_coroutine_wrapper() # 包装, 默认None