class socketserver.TCPServer(server_address, RequestHandlerClass, bind_and_activate=True) This uses the Internet TCP protocol, which provides for continuous streams of data between the client and server. If bind_and_activate is true, the constructor automatically attempts to invoke server_bind() and server_activate(). The other parameters are passed to the BaseServer base class.

socket.dup() Duplicate the socket. The newly created socket is non-inheritable. Changed in version 3.4: The socket is now non-inheritable.

module_repr(module) A legacy method which when implemented calculates and returns the given module’s repr, as a string. The module type’s default repr() will use the result of this method as appropriate. New in version 3.3. Changed in version 3.4: Made optional instead of an abstractmethod. Deprecated since version 3.4: The import machinery now takes care of this automatically.

binascii.a2b_hex(hexstr) binascii.unhexlify(hexstr) Return the binary data represented by the hexadecimal string hexstr. This function is the inverse of b2a_hex(). hexstr must contain an even number of hexadecimal digits (which can be upper or lower case), otherwise an Error exception is raised.

DefaultCookiePolicy.allowed_domains() Return None, or the sequence of allowed domains (as a tuple).

cgi.print_form(form) Format a form in HTML.

cmath.atan(x) Return the arc tangent of x. There are two branch cuts: One extends from 1j along the imaginary axis to ∞j, continuous from the right. The other extends from -1j along the imaginary axis to -∞j, continuous from the left.

window.standend() Turn off the standout attribute. On some terminals this has the side effect of turning off all attributes.

os.lchmod(path, mode) Change the mode of path to the numeric mode. If path is a symlink, this affects the symlink rather than the target. See the docs for chmod() for possible values of mode. As of Python 3.3, this is equivalent to os.chmod(path, mode, follow_symlinks=False). Availability: Unix.

curses.ascii.isspace(c) Checks for ASCII white-space characters; space, line feed, carriage return, form feed, horizontal tab, vertical tab.