#---------------------------------------------------------------
# pal_naive.py
#---------------------------------------------------------------
# Naive palindrome

# take in user input
exp = input('Give me a palindrome: ')

# string reversing routine 
new = ''                   # new is initially empty
for x in exp:
    new = x + new
exp_rev = new              # exp_rev is reversed exp

# test and print out 
if len(exp) <= 2 :              # case 1: input too short
    print('Sorry, try something longer.')
elif exp == exp_rev :           # case 2: is palindrome
    print('YES, "'+exp+'" is a palindrome.')
else :                          # case 3: not palindrome
    print('NO, "'+exp+'" is not a palindrome.')











	

#---------------------------------------------------------------
# pal_smart.py
#---------------------------------------------------------------
# Smart palindrome

# take in user input
exp = input('Give me a palindrome: ')

# clean up user input: lowercase, remove space and punctuation
exp_clean = exp.lower().replace(' ', '').replace(',', '').replace("'", '').replace(':', '').replace('.', '')

# string reversing routine, using exp_clean now 
new = ''                   # new is initially empty
for x in exp_clean :
    new = x + new
exp_rev = new              # exp_rev is reversed exp_clean

# test and print out 
if len(exp) <= 2 :              # case 1: input too short
    print('Sorry, try something longer.')
elif exp_clean == exp_rev :     # case 2: is palindrome
    print('YES, "'+exp+'" is a palindrome.')
else :                          # case 3: not palindrome
    print('NO, "'+exp+'" is not a palindrome.')














#---------------------------------------------------------------
# pal_loop.py
#---------------------------------------------------------------
# Insistent palindrome

print("Hello! Let's start.")  # initial message, outside loop

# loop condition: initially set to false
success = False

# loop back while unsuccessful
while not success : 
    
    # take in user input
    exp = input('Give me a palindrome: ')

    # clean up user input: lowercase, remove space and punctuation
    # line was too long: using \ to break up
    exp_clean = exp.lower().replace(' ', '').replace(',', '') \
                .replace("'", '').replace(':', '').replace('.', '')

    # string reversing routine, using exp_clean now 
    new = ''                   # new is initially empty
    for x in exp_clean :
        new = x + new
    exp_rev = new              # exp_rev is reversed exp_clean

    # test and print out 
    if len(exp) <= 2 :              # case 1: input too short
        print('Sorry, try something longer.')
    elif exp_clean == exp_rev :     # case 2: is palindrome
        print('YES, "'+exp+'" is a palindrome.')
        success = True                      # loop condition changed
    else :                          # case 3: not palindrome
        print('NO, "'+exp+'" is not a palindrome. Let\'s try again.')

print("Goodbye.")   # last message, outside loop












#---------------------------------------------------------------
# pal_functions.py
#---------------------------------------------------------------
# Modular palindrome

def getRev(wd):
    "Takes a string, returns its reverse"
    rev = ''
    for i in wd :
        rev = i + rev   
    return rev

def cleanInput(foo):
    "Lowercases input, removes space and punctuation .,':"
    return foo.lower().replace(' ', '').replace(',', '')\
           .replace("'", '').replace(':', '').replace('.', '')


#############################################################
# Main routine below

print("Hello! Let's start.")  # initial message, outside loop

# loop condition: initially set to false
success = False

# loop back while unsuccessful
while not success : 
    
    # take in user input
    exp = input('Give me a palindrome: ')

    exp_clean = cleanInput(exp)   # clean input
    exp_rev = getRev(exp_clean)   # reverse cleaned input

    # test and print out 
    if len(exp) <= 2 :              # case 1: input too short
        print('Sorry, try something longer.')
    elif exp_clean == exp_rev :     # case 2: is palindrome
        print('YES, "'+exp+'" is a palindrome.')
        success = True                      # loop condition changed
    else :                          # case 3: not palindrome
        print('NO, "'+exp+'" is not a palindrome. Let\'s try again.')

print("Goodbye.")   # last message, outside loop