Codeacademy - Python course: Pig Latin (PygLatin) https://www.codecademy.com/learn/python

piglatin.py

# constants
pyg = 'ay'

# input
original = raw_input('Enter a word:')

# check for errors
if len(original) > 0 and original.isalpha():
    print original
else:
    raise ValueError('invalid input')

# process input
word = original.lower()
first = word[0]
slipped_word = word[1:]
# new word: previous word without first char + first char + pyg ending
new_word = slipped_word + first + pyg

#output
print new_word

thanks for the great help.
your tutorial is very helpful.