def score(peptide, perfect_spectrum, table):
actual_spectrum = generate_cyclo_spectrum(peptide, table)
result_score = 0
i1 = 0
i2 = 0
actual_spectrum = map(int, actual_spectrum)
perfect_spectrum = map(int, perfect_spectrum)
while i1 < len(actual_spectrum) and i2 < len(perfect_spectrum):
if actual_spectrum[i1] == perfect_spectrum[i2]:
result_score += 1
i1 += 1
i2 += 1
elif actual_spectrum[i1] > perfect_spectrum[i2]:
i2 += 1
elif actual_spectrum[i1] < perfect_spectrum[i2]:
i1 += 1
return result_score
def cyclo_sequence(spectrum, table):
leaderboard = ['']
leader_peptides = ['']
parent_mass = spectrum[-1]
while len(leaderboard) > 0:
new_leaderboard = []
map(lambda x: new_leaderboard.extend([peptide + x for peptide in leaderboard]), LETTERS)
leaderboard = new_leaderboard
stuff_to_remove = []
for peptide in leaderboard:
if weight(peptide, table) == parent_mass:
if generate_cyclo_spectrum(peptide, table) == spectrum:
leader_peptides.append(peptide)
stuff_to_remove.append(peptide)
elif not is_spectrum_consistent(generate_linear_spectrum(peptide, table), perfect_spectrum):
stuff_to_remove.append(peptide)
[leaderboard.remove(x) for x in stuff_to_remove]
return leader_peptides
