human
Complete the below
def localcontext(ctx=None):

    ''''Return a context manager for a copy of the supplied context
    Uses a copy of the current context if no context is specified
    The returned context manager creates a local decimal context
    in a with statement:
    def sin(x):
    with localcontext() as ctx:
    ctx.prec += 2
    # Rest of sin calculation algorithm
    # uses a precision 2 greater than normal
    return +s  # Convert result to normal precision
    def sin(x):
    with localcontext(ExtendedContext):
    # Rest of sin calculation algorithm
    # uses the Extended Context from the
    # General Decimal Arithmetic Specification
    return +s  # Convert result to normal context
    >>> setcontext(DefaultContext)
    >>> print(getcontext().prec)
    28
    >>> with localcontext():
    ...     ctx = getcontext()
    ...     ctx.prec += 2
    ...     print(ctx.prec)
    30
    >>> with localcontext(ExtendedContext):
    ...     print(getcontext().prec)
    9
    >>> print(getcontext().prec)
    28'
    '''

=====
Can you provide a the Python code you requested?
assistant
#Here is the Python code you requested.
    if (ctx is None):
        ctx = getcontext()
    return _ContextManager(ctx)