Question

我试图解析DNA字符串。

input.txt包含：

Rosalind_6404CCTGCGGAAGATCGGCACTAGAATAGCCAGAACCGTTTCTCTGAGGCTTCCGGCCTTCCCTCCCACTAATAATTCTGAGG＆GT; Rosalind_5959CCATCGGTAGCGCATCCTTAGTCCAATTAAGTCCCTATCCAGGCGCTCCGCCGAAGGTCTATATCCATTTGTCAGCAGACACGC＆GT; Rosalind_0808CCACCCTCGTGGTATGGCTAGGCATTCAGGAACCGGAGAACGCTTCAGACCAGCCCGGACTGGGAACCTGCGGGCAGTAGGTGGAAT

代码是：

f = open('input.txt', 'r')
raw_samples = f.readlines()
f.close()
samples = {}
cur_key = ''
for elem in raw_samples:
    if elem[0] == '>':
        cur_key = elem[1:].rstrip()
        samples[cur_key] = ''
    else:
        samples[cur_key] = samples[cur_key] + elem.rstrip()
print(samples)
for p_id, s in samples.values():
    samples[s_id] = (s.count('G') + s.count('C'))*100
print (samples)`

我一直收到错误：

  File "C:/Python34/test.py", line 18, in <module>
    for p_id, s in samples.values():
ValueError: too many values to unpack (expected 2)

Answer 1

我能够通过改变来解决问题 for p_id, s in samples.values()来 for p_id, s in samples.items()

我还注意到p_id和s_id是不同的，它们本来是一样的。

Answer 2

import csv
reader = csv.reader(open("input.txt"), delimiter=">", quotechar="'")
dkeys = [item for item in next(reader) if item.strip()]
dvalues = [(item.count('G')+item.count('C')*100) for item in dkeys]
print(dict(zip(dkeys, dvalues)))

我希望它有用。：d

ValueError：太多的值也解压缩（预期2）

2 个答案: