def isPalindrome(s, ignorecase=False):

    """
    >>> type(isPalindrome("bob"))
    <type 'bool'>
    >>> isPalindrome("abc")
    False
    >>> isPalindrome("bob")
    True
    >>> isPalindrome("a man a plan a canal, panama")
    True
    >>> isPalindrome("A man a plan a canal, Panama")
    False
    >>> isPalindrome("A man a plan a canal, Panama", ignorecase=True)
    True
    """
    Letters = ""
    for i in s:
        letter = str.isalpha(i);
        if letter == True:
                Letters += i

    reverseLetters = Letters[::-1]

    if reverseLetters == Letters and ignorecase == False:
        return True
    elif reverseLetters.upper() == Letters.upper() and ignorecase == True:
        return True
    else:
        return False