fix division by zero bug in data_formatting

src/data_formatting.py

@@ -108,9 +108,14 @@ for file in files_alignement:
 		r_identity=round( (nb_identity/len(seq)*100) ,1)
 		r_match=round( (match/len(seq)*100) ,1)
 		r_error=round( (error/len(seq)*100) ,1)
+		if (error != 0):
 			r_sub=round((nb_substitution/error*100),1)
 			r_del=round((nb_deletion/error*100),1)
 			r_ins=round((nb_insertion/error*100),1)
+		else:
+			r_sub=0
+			r_del=0
+			r_ins=0
 		data[MSA][read_size][nb_read]=[nb_ambiguity,r_ambiguity,nb_identity,r_identity,match,r_match,
 		error,r_error,nb_substitution,r_sub,nb_deletion,r_del,nb_insertion,r_ins,size_seq]