## Lab 3
## Hand in at the end of Lab

def main():
	'''
	Main method.  This is where the bulk of the work gets done.
	(You can denote block comments as lines between triple quotes)
	'''

	## 1. Consider the following DNA sequence.  Create two variables that contain 
	## the complement of the DNA sequence and the reverse complement of the DNA
	## sequence.  Do this by hand.
	dna = 'ATAGCATTGC'
	compdna = '<FILL IN>'
	revcompdna = '<FILL IN>'
	print('DNA:',dna)
	print('Comp. DNA:',compdna)
	print('Rev. Comp. DNA:',revcompdna)

	## print the output of the two intermediate functions.
	print()
	print('Intermediate Functions:')
	print('complement():',complement(dna))
	print('reverse():',reverse(dna))

	## Compute the reverse complement
	print()
	computedSequence = reverseComplement(dna)
	print('reverseComplement():',computedSequence)
	
	## 5. Use an IF statement to print 'Correct Answer!' if the computed
	## sequence and the hand-written sequences match and 'Incorrect Answer'
	## otherwise.
	
	return 

## 2. Write a function to return the complement of a string.
def complement(sequence):
	comp = ''
	print('<#2 FILL IN HERE>')
	return comp

## 3. Write a function to return the reverse of a string.
def reverse(sequence):
	rev = ''
	print('<#3 FILL IN HERE>')
	return rev

## 4. Write a function to compute the reverse complement
## of a string.  Return this string.
def reverseComplement(sequence):
	revcomp = ''
	print('<#4 FILL IN HERE>')
	return revcomp

## The lines below will call the main() function 
if __name__ == '__main__':
	main()