class threading.Condition(lock=None) This class implements condition variable objects. A condition variable allows one or more threads to wait until they are notified by another thread. If the lock argument is given and not None, it must be a Lock or RLock object, and it is used as the underlying lock. Otherwise, a new RLock object is created and used as the underlying lock. Changed in version 3.3: changed from a factory function to a class. acquire(*args) Acquire the underlying lock. T

ctypes.GetLastError() Windows only: Returns the last error code set by Windows in the calling thread. This function calls the Windows GetLastError() function directly, it does not return the ctypes-private copy of the error code.

FTP_TLS.ccc() Revert control channel back to plaintext. This can be useful to take advantage of firewalls that know how to handle NAT with non-secure FTP without opening fixed ports. New in version 3.3.

write(s) Write the string s to the underlying file object. s is encoded using the ASCII codec and written to the write method of the outfp outfp passed to the BytesGenerator‘s constructor. This provides just enough file-like API for BytesGenerator instances to be used in the print() function.

header_source_parse(sourcelines) The email package calls this method with a list of strings, each string ending with the line separation characters found in the source being parsed. The first line includes the field header name and separator. All whitespace in the source is preserved. The method should return the (name, value) tuple that is to be stored in the Message to represent the parsed header. If an implementation wishes to retain compatibility with the existing email package policies,

remove(subelement) Removes subelement from the element. Unlike the find* methods this method compares elements based on the instance identity, not on tag value or contents.

Cookie.get_nonstandard_attr(name, default=None) If cookie has the named cookie-attribute, return its value. Otherwise, return default.

install_scripts(context, path) path is the path to a directory that should contain subdirectories “common”, “posix”, “nt”, each containing scripts destined for the bin directory in the environment. The contents of “common” and the directory corresponding to os.name are copied after some text replacement of placeholders: __VENV_DIR__ is replaced with the absolute path of the environment directory. __VENV_NAME__ is replaced with the environment name (final path segment of environment directo

ArgumentParser.add_mutually_exclusive_group(required=False) Create a mutually exclusive group. argparse will make sure that only one of the arguments in the mutually exclusive group was present on the command line: >>> parser = argparse.ArgumentParser(prog='PROG') >>> group = parser.add_mutually_exclusive_group() >>> group.add_argument('--foo', action='store_true') >>> group.add_argument('--bar', action='store_false') >>> parser.parse_args(['--foo

math.acos(x) Return the arc cosine of x, in radians.