ROSALIND RNA Splicing solution - https://rosalind.info/problems/splc/

 import re  
 from asyncio.windows_events import NULL  
 f = open("out.txt", "w")  
 condon_len = 3  
 test= "TCTCGAGAGGCATATGGTCACATGATCGGTCGAGCGTGTTTCAAAGTTTGCGCCTAG"  
 dna_map = {  
   "TTT":"F", "TCT":"S", "TAT":"Y", "TGT":"C",   
 "TTC":"F", "TCC":"S", "TAC":"Y", "TGC":"C",   
 "TTA":"L", "TCA":"S", "TAA":"STOP", "TGA":"STOP",   
 "TTG":"L", "TCG":"S", "TAG":"STOP", "TGG":"W",   
 "CTT":"L", "CCT":"P", "CAT":"H", "CGT":"R",   
 "CTC":"L", "CCC":"P", "CAC":"H", "CGC":"R",   
 "CTA":"L", "CCA":"P", "CAA":"Q", "CGA":"R",   
 "CTG":"L", "CCG":"P", "CAG":"Q", "CGG":"R",   
 "ATT":"I", "ACT":"T", "AAT":"N", "AGT":"S",   
 "ATC":"I", "ACC":"T", "AAC":"N", "AGC":"S",   
 "ATA":"I", "ACA":"T", "AAA":"K", "AGA":"R",   
 "ATG":"M", "ACG":"T", "AAG":"K", "AGG":"R",   
 "GTT":"V", "GCT":"A", "GAT":"D", "GGT":"G",   
 "GTC":"V", "GCC":"A", "GAC":"D", "GGC":"G",   
 "GTA":"V", "GCA":"A", "GAA":"E", "GGA":"G",   
 "GTG":"V", "GCG":"A", "GAG":"E", "GGG":"G"  
 }  
 def GetAA(condon):  
   return dna_map[condon]  
 class Sequence:  
   def __init__(self, name, seq):  
     self.name = name  
     self.seq = seq  
     self.found = []  
   def p(self):  
     print("seq name:" + self.name + "len:" + str(len(self.seq)))   
     print("seq:" + self.seq)  
     for s in self.found:  
       print(s)   
   def pAA(self):  
     print (self.found[0])   
     f.write(self.found[0])     
   def Translate(self):  
     seq_len = len(self.seq)  
     aa_seq=""  
     start_pos = 0  
     end_pos = condon_len  
     while end_pos <= seq_len:  
       condon = self.seq[start_pos:end_pos]  
       AA = GetAA(condon)  
       if AA=="STOP":  
         break  
       aa_seq = aa_seq + AA  
       start_pos = start_pos + condon_len  
       end_pos = end_pos + condon_len  
     self.found.append(aa_seq)    
 input_file = open("rosalind_splc.txt", "r")  
 lines = input_file.readlines()  
 list = []  
 s = NULL  
 for l in lines:  
   if (l[0]==">"):  
     if s != NULL:  
       list.append(s)  
     s = Sequence(l.replace('\n', ''), '')  
   else:  
     s.seq = s.seq + l.replace('\n', '')  
 list.append(s)      
 list_len = len(list)  
 for i in range(1, list_len):  
   list[0].seq = list[0].seq.replace(list[i].seq, '')  
 list[0].Translate()  
 list[0].pAA()    
 f.close()