deleted power_of_4

bit_manipulation/power_of_4

@@ -1,61 +0,0 @@
-"""
-
-Task:
-Given a positive int number. Return True if this number is power of 4
-or False otherwise.
-
-Implementation notes: Use bit manipulation.
-For example if the number is the power of 2 it's bits representation:
-n     = 0..100..00
-n - 1 = 0..011..11
-
-n & (n - 1) - no intersections = 0
-If the number is a power of 4 then it should be a power of 2 and the set bit should be at an odd position
-"""
-
-
-def power_of_4(number: int) -> bool:
-    """
-    Return True if this number is power of 4 or False otherwise.
-
-    >>> power_of_4(0)
-    False
-    >>> power_of_4(1)
-    True
-    >>> power_of_4(2)
-    False
-    >>> power_of_4(4)
-    True
-    >>> power_of_4(6)
-    False
-    >>> power_of_4(8)
-    False
-    >>> power_of_4(17)
-    False
-    >>> power_of_4(-1)
-    Traceback (most recent call last):
-        ...
-    ValueError: number must be positive
-    >>> power_of_4(1.2)
-    Traceback (most recent call last):
-        ...
-    TypeError: unsupported operand type(s) for &: 'float' and 'float'
-
-    """
-    if number <= 0:
-        raise ValueError("number must be positive")
-    if number & (number - 1) == 0:
-        c = 0
-        while number:
-            c+=1
-            number>>=1
-        if c&1==0:
-            return True
-        else:
-            return False
-
-
-if __name__ == "__main__":
-    import doctest
-
-    doctest.testmod()