cradle.py

import sys

# Variable declarations
look = '' # Lookahead character

# Read New Character From Input Stream
def GetChar():
	global look
	look = sys.stdin.read(1)

# Report an Error
def Error(s):
	print ''
	print 'Error: ' + s + '.'

# Report Error and Halt
def Abort(s):
	Error(s)
	sys.exit()

# Report What Was Expected
def Expected(s):
	Abort(s + ' Expected')
 
# Match a Specific Input Character
def Match(x):
	global look
	if look == x:
		GetChar()
	else:
		Expected(''' + x + ''')

# Recognize an Alpha Character
def IsAlpha(c):
	return c.isalpha()

# Recognize a Decimal Digit
def IsDigit(c):
	return c.isdigit()

# Get an Identifier
def GetName():
	val = 0
	global look
	if not IsAlpha(look):
		Expected('Name')
	else:
		val = look.upper()
		GetChar()
		return val #? maybe not intented?

# Get a Number
def GetNum():
	val = 0
	global look
	if not IsDigit(look):
		Expected('Integer')
	else:
		val = look.upper()
		GetChar()
		return val #? maybe not intented?

# Output a String with Tab
def Emit(s):
	print '\t' , s

# Output a String with Tab and CRLF
def EmitLn(s):
	Emit(s)
	print '\n'

# Initialize 
def Init():
	GetChar()

#def main():
#	Init()

#if __name__ == '__main__':
#	main()