The shifting operations have lower priority than the arithmetic operations:
shift_expr: a_expr | shift_expr ( "<<" | ">>" ) a_expr
These operators accept plain or long integers as arguments. The arguments are converted to a common type. They shift the first argument to the left or right by the number of bits given by the second argument.
A right shift by n bits is defined as division by 2n. A left shift by n bits is defined as multiplication with 2n; for plain integers there is no overflow check so this drops bits and flip the sign if the result is not less than 231 in absolute value.
Negative shift counts raise a ValueError exception.
ValueError