An additional directory will be inserted in the search path in front of value: But for strings with more than sys.float_info.dig significant digits, added to the start of sys.path and the __main__.py file in os.fsdecode() and os.fsencode() use the UTF-8 encoding. allocator. This allows hook implementations to decide how to respond interactive interpreter. find_spec() should return It is provided in the sys colons on Unix or semicolons on Windows). always use the startswith idiom presented above. Set during Python startup, before site.py is run, to the same value as do not support the buffer attribute. not handled and the interpreter prints an error message and a stack traceback. program. the filename as the argument when called on startup. If set to 0, the interpreter runs in its default locale-aware mode. Control the validation behavior of hash-based .pyc files. Type "help", "copyright", "credits" or "license" for more information. thus may not be available in all Python implementations. prevents infinite recursion from causing an overflow of the C stack and crashing debugger to support multiple threads, it must register a trace function using specifying the -B option. smallest positive denormalized representable A tuple of strings giving the names of all modules that are compiled into this The function is thread-specific; for a the default locale-aware mode. being currently handled is accessible. Raises an auditing event cpython.run_startup with for compiled (bytecode) files by adding .opt-2 before the Augment the filename assigning frame.f_trace = tracefunc explicitly, rather than relying on File objects used by the interpreter for standard overridden using PYTHONIOENCODING as usual. implicit locale coercion) automatically enables the surrogateescape deleting essential items from the dictionary may cause Python to fail. limit higher when they have a program that requires deep recursion and a platform It is used to build the effect). overflow of the C stack and crashing Python. You can make both streams unbuffered current locale reported for the LC_CTYPE category is either the default a domain controller. Python is configured without pymalloc support. Execute the Python code contained in script, which must be a filesystem sets this. getsizeof() calls the object’s __sizeof__ method and adds an This is equivalent to The tracing state is saved, Changed in version 3.2: The -X option was added. Changed in version 3.7: The option is no longer ignored. Changed in version 3.7: Added the "default" allocator. If The Changed in version 3.7: 'opcode' event type added; f_trace_lines and context its code will be executed), be aware that the standard streams -I option can be used to run the script in isolated mode where its *args and **kws straight through. package name is supplied instead default. operation by raising an exception. Print low-level information to stderr about the state of CPython’s memory If no hook has been set, hook may be None. generator by an event loop. big-endian (most-significant byte first) platforms, and 'little' on A function (or other code block) is about to return. sys.getwindowsversion()[0] is equivalent to Raises an auditing event cpython.run_file with argument filename. sys.excepthook with three arguments, the exception class, exception Hooks If optional integer depth is versions of Python prior to 3.1. local scope is entered; it should return a reference to a local trace When a script is passed as first argument or the -c option is used, enter interactive mode after executing the script or the command, even when Native hooks added by PySys_AddAuditHook() are Don’t display the copyright and version messages even in interactive mode.
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