Adding soultion to lesson 5

Charlotte Weaver · Charlotte Weaver · commit d14ffa710858 · 2016-02-26T09:59:31.000-05:00
diff --git a/Lesson05_Strings/DNAExtravaganzaSOLUTION.py b/Lesson05_Strings/DNAExtravaganzaSOLUTION.py
@@ -0,0 +1,47 @@
+def codons(dna):
+	return len(dna) / 3
+
+def start(dna):
+	return dna.find('ATG')
+
+def stop(dna):
+	first_stop = -1
+	taa = dna.find('TAA')
+	tag = dna.find('TAG')
+	tga = dna.find('TGA')
+	if taa > first_stop:
+		first_stop = taa
+	if tag > first_stop:
+		first_stop = tag
+	if tga > first_stop:
+		first_stop = tga
+	return first_stop
+
+def gene(dna):
+	beginning = start(dna)
+	end = stop(dna) + 3
+	return dna[beginning: end]
+
+def transcription(dna):
+	rna = ''
+	for base in dna:
+		if base == 'A':
+			rna += 'U'
+		elif base == 'T':
+			rna += 'A'
+		elif base == 'C':
+			rna += 'G'
+		elif base == 'G':
+			rna += 'C'
+	return rna
+
+def dnaExtravaganza(dna):
+	num_codons = codons(dna)
+	beginning = start(dna)
+	end = stop(dna) 
+	orf = gene(dna)
+	rna = transcription(dna)
+	print "DNA: {0}\nCODONS: {1}\nSTART: {2}\nSTOP: {3}\nGENE: {4}\nRNA: {5}\n".format(dna, num_codons, beginning, end, orf, rna)
+
+dnaExtravaganza("CAGTAGTAGCTACGACTATGCAGTCGATGCTAGTGACTGAACGTACGATAGCTGATAACGATGATGCATGTAGCTGA")
+	
