def ipv4_lstrip_zeros(address):
    """
    The function to strip leading zeros in each octet of an IPv4 address.

    Args:
        address: An IPv4 address in string format.

    Returns:
        String: The modified IPv4 address string.
    """

    # Split  the octets.
    obj = address.strip().split('.')

    for x, y in enumerate(obj):

        # Strip leading zeros. Split / here in case CIDR is attached.
        obj[x] = y.split('/')[0].lstrip('0')
        if obj[x] in ['', None]:
            obj[x] = '0'

    return '.'.join(obj)