def is_Prime(n):
    """
        Check if a number is prime.
    """

    # make sure n is a positive integer
    n = abs(int(n))
    # 0 and 1 are not primes
    if n < 2:
        return False
    # 2 is the only even prime number
    if n == 2:
        return True
    # all other even numbers are not primes
    if not n & 1:
        return False
    # range starts with 3 and only needs to go up the squareroot of n
    # for all odd numbers
    for x in range(3, int(n ** 0.5) + 1, 2):
        if n % x == 0:
            return False
    return True
dataset/ETHPy150Open Agerrr/Automated_Music_Transcription/least_squares_first_peaks_2.py/is_Prime/original