lock() unlock() Three locking mechanisms are used—dot locking and, if available, the flock() and lockf() system calls.

_thread.interrupt_main() Raise a KeyboardInterrupt exception in the main thread. A subthread can use this function to interrupt the main thread.

ssl.PROTOCOL_TLSv1_2 Selects TLS version 1.2 as the channel encryption protocol. This is the most modern version, and probably the best choice for maximum protection, if both sides can speak it. Available only with openssl version 1.0.1+. New in version 3.4.

Logger.warning(msg, *args, **kwargs) Logs a message with level WARNING on this logger. The arguments are interpreted as for debug(). Note There is an obsolete method warn which is functionally identical to warning. As warn is deprecated, please do not use it - use warning instead.

InputSource.getCharacterStream() Get the character stream for this input source.

class decimal.FloatOperation Enable stricter semantics for mixing floats and Decimals. If the signal is not trapped (default), mixing floats and Decimals is permitted in the Decimal constructor, create_decimal() and all comparison operators. Both conversion and comparisons are exact. Any occurrence of a mixed operation is silently recorded by setting FloatOperation in the context flags. Explicit conversions with from_float() or create_decimal_from_float() do not set the flag. Otherwise (the

posix.environ A dictionary representing the string environment at the time the interpreter was started. Keys and values are bytes on Unix and str on Windows. For example, environ[b'HOME'] (environ['HOME'] on Windows) is the pathname of your home directory, equivalent to getenv("HOME") in C. Modifying this dictionary does not affect the string environment passed on by execv(), popen() or system(); if you need to change the environment, pass environ to execve() or add variable assignments and

os.startfile(path[, operation]) Start a file with its associated application. When operation is not specified or 'open', this acts like double-clicking the file in Windows Explorer, or giving the file name as an argument to the start command from the interactive command shell: the file is opened with whatever application (if any) its extension is associated. When another operation is given, it must be a “command verb” that specifies what should be done with the file. Common verbs documented

Node.removeChild(oldChild) Remove a child node. oldChild must be a child of this node; if not, ValueError is raised. oldChild is returned on success. If oldChild will not be used further, its unlink() method should be called.

XMLReader.getFeature(featurename) Return the current setting for feature featurename. If the feature is not recognized, SAXNotRecognizedException is raised. The well-known featurenames are listed in the module xml.sax.handler.