1.sys模块源代码

# encoding: utf-8
# module sys
# from (built-in)
# by generator 1.145
"""
This module provides access to some objects used or maintained by the
interpreter and to functions that interact strongly with the interpreter.

Dynamic objects:

modules -- dictionary of loaded modules

displayhook -- called to show results in an interactive session
excepthook -- called to handle any uncaught exception other than SystemExit
To customize printing in an interactive session or to install a custom
top-level exception handler, assign other functions to replace these.

stdin -- standard input file object; used by input()
stderr -- standard error object; used for error messages
By assigning other file objects (or objects that behave like files)
to these, it is possible to redirect all of the interpreter's I/O.

last_type -- type of last uncaught exception
last_value -- value of last uncaught exception
last_traceback -- traceback of last uncaught exception
These three are only available in an interactive session after a
traceback has been printed.

Static objects:

builtin_module_names -- tuple of module names built into this interpreter
copyright -- copyright notice pertaining to this interpreter
exec_prefix -- prefix used to find the machine-specific Python library
executable -- absolute path of the executable binary of the Python interpreter
float_info -- a struct sequence with information about the float implementation.
float_repr_style -- string indicating the style of repr() output for floats
hash_info -- a struct sequence with information about the hash algorithm.
hexversion -- version information encoded as a single integer
implementation -- Python implementation information.
int_info -- a struct sequence with information about the int implementation..
maxunicode -- the value of the largest Unicode code point
prefix -- prefix used to find the Python library
thread_info -- a struct sequence with information about the thread implementation.
version_info -- version information as a named tuple
dllhandle -- [Windows only] integer handle of the Python DLL
winver -- [Windows only] version number of the Python DLL
_enablelegacywindowsfsencoding -- [Windows only]
__stdin__ -- the original stdin; don't touch!
__stdout__ -- the original stdout; don't touch!
__stderr__ -- the original stderr; don't touch!
__displayhook__ -- the original displayhook; don't touch!
__excepthook__ -- the original excepthook; don't touch!

Functions:

displayhook() -- print an object to the screen, and save it in builtins._
excepthook() -- print an exception and its traceback to sys.stderr
exc_info() -- return thread-safe information about the current exception
exit() -- exit the interpreter by raising SystemExit
getdlopenflags() -- returns flags to be used for dlopen() calls
getprofile() -- get the global profiling function
getrefcount() -- return the reference count for an object (plus one :-)
getrecursionlimit() -- return the max recursion depth for the interpreter
getsizeof() -- return the size of an object in bytes
gettrace() -- get the global debug tracing function
setcheckinterval() -- control how often the interpreter checks for events
setdlopenflags() -- set the flags to be used for dlopen() calls
setprofile() -- set the global profiling function
setrecursionlimit() -- set the max recursion depth for the interpreter
settrace() -- set the global debug tracing function
"""
# no imports

# Variables with simple values

api_version = 1013

base_exec_prefix = 'C:\\BuildAgent\\system\\.persistent_cache\\pycharm\\pythons4skeletons\\python36'

base_prefix = 'C:\\BuildAgent\\system\\.persistent_cache\\pycharm\\pythons4skeletons\\python36'

byteorder = 'little'

copyright = 'Copyright (c) 2001-2017 Python Software Foundation.\nAll Rights Reserved.\n\nCopyright (c) 2000 BeOpen.com.\nAll Rights Reserved.\n\nCopyright (c) 1995-2001 Corporation for National Research Initiatives.\nAll Rights Reserved.\n\nCopyright (c) 1991-1995 Stichting Mathematisch Centrum, Amsterdam.\nAll Rights Reserved.'

dllhandle = 1943601152

dont_write_bytecode = True

executable = 'C:\\BuildAgent\\system\\.persistent_cache\\pycharm\\pythons4skeletons\\python36\\python.exe'

exec_prefix = 'C:\\BuildAgent\\system\\.persistent_cache\\pycharm\\pythons4skeletons\\python36'

float_repr_style = 'short'

hexversion = 50725616

# maxsize -- the largest supported length of containers

maxsize = 9223372036854775807

maxunicode = 1114111

# platform -- platform identifier
platform = 'win32'

prefix = 'C:\\BuildAgent\\system\\.persistent_cache\\pycharm\\pythons4skeletons\\python36'

# version -- the version of this interpreter as a string
version = '3.6.2 (v3.6.2:5fd33b5, Jul 8 2017, 04:57:36) [MSC v.1900 64 bit (AMD64)]'

winver = '3.6'

_home = None

# functions

def callstats(): # real signature unknown; restored from __doc__
"""
callstats() -> tuple of integers

Return a tuple of function call statistics, if CALL_PROFILE was defined
when Python was built. Otherwise, return None.

When enabled, this function returns detailed, implementation-specific
details about the number of function calls executed. The return value is
a 11-tuple where the entries in the tuple are counts of:
0. all function calls
1. calls to PyFunction_Type objects
2. PyFunction calls that do not create an argument tuple
3. PyFunction calls that do not create an argument tuple
and bypass PyEval_EvalCodeEx()
4. PyMethod calls
5. PyMethod calls on bound methods
6. PyType calls
7. PyCFunction calls
8. generator calls
9. All other calls
10. Number of stack pops performed by call_function()
"""
return ()

def call_tracing(func, args): # real signature unknown; restored from __doc__
"""
call_tracing(func, args) -> object

Call func(*args), while tracing is enabled. The tracing state is
saved, and restored afterwards. This is intended to be called from
a debugger from a checkpoint, to recursively debug some other code.
"""
return object()

def displayhook(p_object): # real signature unknown; restored from __doc__
"""
displayhook(object) -> None

Print an object to sys.stdout and also save it in builtins._
"""
pass

def excepthook(exctype, value, traceback): # real signature unknown; restored from __doc__
"""
excepthook(exctype, value, traceback) -> None

Handle an exception by displaying it with a traceback on sys.stderr.
"""
pass

def exc_info(): # real signature unknown; restored from __doc__
"""
exc_info() -> (type, value, traceback)

Return information about the most recent exception caught by an except
clause in the current stack frame or in an older stack frame.
"""
pass

def exit(status=None): # real signature unknown; restored from __doc__
"""
exit([status])

Exit the interpreter by raising SystemExit(status).
If the status is omitted or None, it defaults to zero (i.e., success).
If the status is an integer, it will be used as the system exit status.
If it is another kind of object, it will be printed and the system
exit status will be one (i.e., failure).
"""
pass

def getallocatedblocks(): # real signature unknown; restored from __doc__
"""
getallocatedblocks() -> integer

Return the number of memory blocks currently allocated, regardless of their
size.
"""
return 0

def getcheckinterval(): # real signature unknown; restored from __doc__
""" getcheckinterval() -> current check interval; see setcheckinterval(). """
pass

def getdefaultencoding(): # real signature unknown; restored from __doc__
"""
getdefaultencoding() -> string

Return the current default string encoding used by the Unicode
implementation.
"""
return ""

def getfilesystemencodeerrors(): # real signature unknown; restored from __doc__
"""
getfilesystemencodeerrors() -> string

Return the error mode used to convert Unicode filenames in
operating system filenames.
"""
return ""

def getfilesystemencoding(): # real signature unknown; restored from __doc__
"""
getfilesystemencoding() -> string

Return the encoding used to convert Unicode filenames in
operating system filenames.
"""
return ""

def getprofile(): # real signature unknown; restored from __doc__
"""
getprofile()

Return the profiling function set with sys.setprofile.
See the profiler chapter in the library manual.
"""
pass

def getrecursionlimit(): # real signature unknown; restored from __doc__
"""
getrecursionlimit()

Return the current value of the recursion limit, the maximum depth
of the Python interpreter stack. This limit prevents infinite
recursion from causing an overflow of the C stack and crashing Python.
"""
pass

def getrefcount(p_object): # real signature unknown; restored from __doc__
"""
getrefcount(object) -> integer

Return the reference count of object. The count returned is generally
one higher than you might expect, because it includes the (temporary)
reference as an argument to getrefcount().
"""
return 0

def getsizeof(p_object, default): # real signature unknown; restored from __doc__
"""
getsizeof(object, default) -> int

Return the size of object in bytes.
"""
return 0

def getswitchinterval(): # real signature unknown; restored from __doc__
""" getswitchinterval() -> current thread switch interval; see setswitchinterval(). """
pass

def gettrace(): # real signature unknown; restored from __doc__
"""
gettrace()

Return the global debug tracing function set with sys.settrace.
See the debugger chapter in the library manual.
"""
pass

def getwindowsversion(): # real signature unknown; restored from __doc__
"""
getwindowsversion()

Return information about the running version of Windows as a named tuple.
The members are named: major, minor, build, platform, service_pack,
service_pack_major, service_pack_minor, suite_mask, and product_type. For
backward compatibility, only the first 5 items are available by indexing.
All elements are numbers, except service_pack and platform_type which are
strings, and platform_version which is a 3-tuple. Platform is always 2.
Product_type may be 1 for a workstation, 2 for a domain controller, 3 for a
server. Platform_version is a 3-tuple containing a version number that is
intended for identifying the OS rather than feature detection.
"""
pass

def get_asyncgen_hooks(): # real signature unknown; restored from __doc__
"""
get_asyncgen_hooks()

Return a namedtuple of installed asynchronous generators hooks (firstiter, finalizer).
"""
pass

def get_coroutine_wrapper(): # real signature unknown; restored from __doc__
"""
get_coroutine_wrapper()

Return the wrapper for coroutine objects set by sys.set_coroutine_wrapper.
"""
pass

def intern(string): # real signature unknown; restored from __doc__
"""
intern(string) -> string

``Intern'' the given string. This enters the string in the (global)
table of interned strings whose purpose is to speed up dictionary lookups.
Return the string itself or the previously interned string object with the
same value.
"""
return ""

def is_finalizing(): # real signature unknown; restored from __doc__
"""
is_finalizing()
Return True if Python is exiting.
"""
pass

def setcheckinterval(n): # real signature unknown; restored from __doc__
"""
setcheckinterval(n)

Tell the Python interpreter to check for asynchronous events every
n instructions. This also affects how often thread switches occur.
"""
pass

def setprofile(function): # real signature unknown; restored from __doc__
"""
setprofile(function)

Set the profiling function. It will be called on each function call
and return. See the profiler chapter in the library manual.
"""
pass

def setrecursionlimit(n): # real signature unknown; restored from __doc__
"""
setrecursionlimit(n)

Set the maximum depth of the Python interpreter stack to n. This
limit prevents infinite recursion from causing an overflow of the C
stack and crashing Python. The highest possible limit is platform-
dependent.
"""
pass

def setswitchinterval(n): # real signature unknown; restored from __doc__
"""
setswitchinterval(n)

Set the ideal thread switching delay inside the Python interpreter
The actual frequency of switching threads can be lower if the
interpreter executes long sequences of uninterruptible code
(this is implementation-specific and workload-dependent).

The parameter must represent the desired switching delay in seconds
A typical value is 0.005 (5 milliseconds).
"""
pass

def settrace(function): # real signature unknown; restored from __doc__
"""
settrace(function)

Set the global debug tracing function. It will be called on each
function call. See the debugger chapter in the library manual.
"""
pass

def set_asyncgen_hooks(*args, **kwargs): # real signature unknown; NOTE: unreliably restored from __doc__
"""
set_asyncgen_hooks(*, firstiter=None, finalizer=None)

Set a finalizer for async generators objects.
"""
pass

def set_coroutine_wrapper(wrapper): # real signature unknown; restored from __doc__
"""
set_coroutine_wrapper(wrapper)

Set a wrapper for coroutine objects.
"""
pass

def _clear_type_cache(): # real signature unknown; restored from __doc__
"""
_clear_type_cache() -> None
Clear the internal type lookup cache.
"""
pass

def _current_frames(): # real signature unknown; restored from __doc__
"""
_current_frames() -> dictionary

Return a dictionary mapping each current thread T's thread id to T's
current stack frame.

This function should be used for specialized purposes only.
"""
return {}

def _debugmallocstats(): # real signature unknown; restored from __doc__
"""
_debugmallocstats()

Print summary info to stderr about the state of
pymalloc's structures.

In Py_DEBUG mode, also perform some expensive internal consistency
checks.
"""
pass

def _enablelegacywindowsfsencoding(): # real signature unknown; restored from __doc__
"""
_enablelegacywindowsfsencoding()

Changes the default filesystem encoding to mbcs:replace for consistency
with earlier versions of Python. See PEP 529 for more information.

This is equivalent to defining the PYTHONLEGACYWINDOWSFSENCODING
environment variable before launching Python.
"""
pass

def _getframe(depth=None): # real signature unknown; restored from __doc__
"""
_getframe([depth]) -> frameobject

Return a frame object from the call stack. If optional integer depth is
given, return the frame object that many calls below the top of the stack.
If that is deeper than the call stack, ValueError is raised. The default
for depth is zero, returning the frame at the top of the call stack.

This function should be used for internal and specialized
purposes only.
"""
pass

def __displayhook__(*args, **kwargs): # real signature unknown
"""
displayhook(object) -> None

Print an object to sys.stdout and also save it in builtins._
"""
pass

def __excepthook__(*args, **kwargs): # real signature unknown
"""
excepthook(exctype, value, traceback) -> None

Handle an exception by displaying it with a traceback on sys.stderr.
"""
pass

def __interactivehook__(): # reliably restored by inspect
# no doc
pass

# classes

class __loader__(object):
"""
Meta path import for built-in modules.

All methods are either class or static methods to avoid the need to
instantiate the class.
"""
@classmethod
def create_module(cls, *args, **kwargs): # real signature unknown
""" Create a built-in module """
pass

@classmethod
def exec_module(cls, *args, **kwargs): # real signature unknown
""" Exec a built-in module """
pass

@classmethod
def find_module(cls, *args, **kwargs): # real signature unknown
"""
Find the built-in module.

If 'path' is ever specified then the search is considered a failure.

This method is deprecated. Use find_spec() instead.
"""
pass

@classmethod
def find_spec(cls, *args, **kwargs): # real signature unknown
pass

@classmethod
def get_code(cls, *args, **kwargs): # real signature unknown
""" Return None as built-in modules do not have code objects. """
pass

@classmethod
def get_source(cls, *args, **kwargs): # real signature unknown
""" Return None as built-in modules do not have source code. """
pass

@classmethod
def is_package(cls, *args, **kwargs): # real signature unknown
""" Return False as built-in modules are never packages. """
pass

@classmethod
def load_module(cls, *args, **kwargs): # real signature unknown
"""
Load the specified module into sys.modules and return it.

This method is deprecated. Use loader.exec_module instead.
"""
pass

def module_repr(module): # reliably restored by inspect
"""
Return repr for the module.

The method is deprecated. The import machinery does the job itself.
"""
pass

def __init__(self, *args, **kwargs): # real signature unknown
pass

__weakref__ = property(lambda self: object(), lambda self, v: None, lambda self: None) # default
"""list of weak references to the object (if defined)"""

__dict__ = None # (!) real value is ''

# variables with complex values

# argv -- command line arguments; argv[0] is the script pathname if known
argv = [] # real value of type <class 'list'> skipped

builtin_module_names = () # real value of type <class 'tuple'> skipped

flags = (
0,
0,
0,
0,
1,
0,
0,
0,
0,
0,
0,
1,
0,
)

float_info = (
1.7976931348623157e+308,
1024,
308,
2.2250738585072014e-308,
-1021,
-307,
15,
53,
2.220446049250313e-16,
2,
1,
)

hash_info = (
64,
2305843009213693951,
314159,
0,
1000003,
'siphash24',
64,
128,
0,
)

implementation = None # (!) real value is ''

int_info = (
30,
4,
)

meta_path = [
__loader__,
None, # (!) real value is ''
None, # (!) real value is ''
]

modules = {} # real value of type <class 'dict'> skipped

# path -- module search path; path[0] is the script directory, else ''
path = [
'C:\\BuildAgent\\work\\87ad6919b0049fba\\out\\classes\\production\\intellij.python.helpers',
'C:\\BuildAgent\\system\\.persistent_cache\\pycharm\\pythons4skeletons\\python36\\python36.zip',
'C:\\BuildAgent\\system\\.persistent_cache\\pycharm\\pythons4skeletons\\python36\\DLLs',
'C:\\BuildAgent\\system\\.persistent_cache\\pycharm\\pythons4skeletons\\python36\\lib',
'C:\\BuildAgent\\system\\.persistent_cache\\pycharm\\pythons4skeletons\\python36',
'C:\\BuildAgent\\system\\.persistent_cache\\pycharm\\pythons4skeletons\\python36\\lib\\site-packages',
]

path_hooks = [
None, # (!) real value is ''
None, # (!) real value is ''
]

path_importer_cache = {} # real value of type <class 'dict'> skipped

stderr = None # (!) real value is ''

stdin = None # (!) forward: __stdin__, real value is ''

# stdout -- standard output file object; used by print()
stdout = None # (!) forward: __stdout__, real value is ''

thread_info = (
'nt',
None,
None,
)

version_info = (
3,
6,
2,
'final',
0,
)

warnoptions = []

_git = (
'CPython',
'v3.6.2',
'5fd33b5',
)

_xoptions = {}

__spec__ = None # (!) real value is ''

__stderr__ = stderr

__stdin__ = None # (!) real value is ''

__stdout__ = None # (!) real value is ''

# intermittent names
exc_value = Exception()
exc_traceback=None

2.sys模块的常见用法

import sys


# 输出命令行参数list。第一个参数：程序路径；后边的参数依次为命令行输入
print(sys.argv)

# 获取python解释程序的版本信息
print(sys.version)

# 容器所支持的最大长度
print(sys.maxsize)

# 搜索模块的路径
print(sys.path)

# 操作系统平台名称
print(sys.platform)

# 标准输出与标准输入
print(sys.stdout.write("Please:"))
val = sys.stdin.readline()[:-1]      # 切片的目的是去除字符串末尾的‘\n’
print(val)

# 退出程序
sys.exit("this is error!")

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