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This module provides access to some objects used or maintained by the interpreter and to functions that interact strongly with the interpreter. Dynamic objects: argv -- command line arguments; argv[0] is the script pathname if known path -- module search path; path[0] is the script directory, else '' 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. exitfunc -- if sys.exitfunc exists, this routine is called when Python exits Assigning to sys.exitfunc is deprecated; use the atexit module instead. stdin -- standard input file object; used by raw_input() and input() stdout -- standard output file object; used by the print statement 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. exc_type -- type of exception currently being handled exc_value -- value of exception currently being handled exc_traceback -- traceback of exception currently being handled The function exc_info() should be used instead of these three, because it is thread-safe. Static objects: float_info -- a dict with information about the float inplementation. long_info -- a struct sequence with information about the long implementation. maxint -- the largest supported integer (the smallest is -maxint-1) maxsize -- the largest supported length of containers. maxunicode -- the largest supported character builtin_module_names -- tuple of module names built into this interpreter version -- the version of this interpreter as a string version_info -- version information as a named tuple hexversion -- version information encoded as a single integer copyright -- copyright notice pertaining to this interpreter platform -- platform identifier executable -- pathname of this Python interpreter prefix -- prefix used to find the Python library exec_prefix -- prefix used to find the machine-specific Python library float_repr_style -- string indicating the style of repr() output for floats __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 __builtin__._ excepthook() -- print an exception and its traceback to sys.stderr exc_info() -- return thread-safe information about the current exception exc_clear() -- clear the exception state for the current thread 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