計算DNA核苷酸A、C、G、T出現次數計算DNA核苷酸A、C、G、T出現次數
with open("rosalind_dna.txt") as f:
fragment_of_dna = f.read()
fragment_of_dna.rsplit()
print(fragment_of_dna.count("A"),
fragment_of_dna.count("C"),
fragment_of_dna.count("G"),
fragment_of_dna.count("T"))
