(x, n)
For an integer x, calculate x << n. Unlike the plain Python
    expression (x << n), n is allowed to be negative, in which case a
    right shift with default (floor) rounding is performed.
For an integer x, calculate x << n. Unlike the plain Python
    expression (x << n), n is allowed to be negative, in which case a
    right shift with default (floor) rounding is performed.
For an integer x calculate x << n . Unlike the plain Python expression ( x << n ) n is allowed to be negative in which case a right shift with default ( floor ) rounding is performed .
def lshift(x, n):
    """For an integer x, calculate x << n. Unlike the plain Python
    expression (x << n), n is allowed to be negative, in which case a
    right shift with default (floor) rounding is performed."""
    if n >= 0: return x << n
    else:      return x >> (-n)
def lshift ( x , n ) : if n >= 0 : return x << n else : return x >> ( - n )