我有一个列表,我想从字典中提取每个元素的值,我想返回
获取从AUG
开始到'*'
开始的新列表或字典中不存在的元素。
例如:
CodD = {"UUU":"F", "UUC":"F", "UUA":"L", "UUG":"L",
"UCU":"S", "UCC":"s", "UCA":"S", "UCG":"S",
"UAU":"Y", "UAC":"Y", "UAA":"*", "UAG":"*",
"UGU":"C", "UGC":"C", "UGA":"*", "UGG":"W",
"CUU":"L", "CUC":"L", "CUA":"L", "CUG":"L",
"CCU":"P", "CCC":"P", "CCA":"P", "CCG":"P",
"CAU":"H", "CAC":"H", "CAA":"Q", "CAG":"Q",
"CGU":"R", "CGC":"R", "CGA":"R", "CGG":"R",
"AUU":"I", "AUC":"I", "AUA":"I", "AUG":"M",
"ACU":"T", "ACC":"T", "ACA":"T", "ACG":"T",
"AAU":"N", "AAC":"N", "AAA":"K", "AAG":"K",
"AGU":"S", "AGC":"S", "AGA":"R", "AGG":"R",
"GUU":"V", "GUC":"V", "GUA":"V", "GUG":"V",
"GCU":"A", "GCC":"A", "GCA":"A", "GCG":"A",
"GAU":"D", "GAC":"D", "GAA":"E", "GAG":"E",
"GGU":"G", "GGC":"G", "GGA":"G", "GGG":"G",}
输入列表:
['UAU', 'AUG', 'AAA', 'UAG', 'CAA', 'GUU', 'UUA', 'UUU', 'AAA', 'UAA', 'GGG',
'UUU', 'AAA', 'UAC', 'AUU', 'ACA', 'CAU', 'AAC', 'AUU', 'UAG', 'ACU', 'UAG',
'GGG', 'AUG', 'AAA', 'AAA', 'ACC', 'AAA', 'AAC', 'CAG', 'UUU', 'GUU', 'ACU',
'UAA', 'CAU', 'GGC', 'AUU', 'GGG', 'CAG']
结果将是
['M','K']
['M','K','K','T','K','Q']
这些由以下形成:
'AUG'
元素,这将启动输出序列CodD[element]
的每个结果添加到输出序列CodD[element]
不存在,或'*'
为<{1}},则输出序列结束。在这样的序列中,一旦开始,再次找到'AUG'
并不重要。
答案 0 :(得分:1)
您可以使用生成器:
def sequences(mapping, lst):
result = None
for elem in lst:
if elem == 'AUG' and result is None:
# start a new list
result = []
if result is None:
# not currently creating an input sequence, ignore this element
continue
value = mapping.get(elem)
if value is None or value == '*':
# sequence end
yield result
result = None
continue
result.append(value)
演示:
>>> # I named your list 'sample' here
...
>>> for result in sequences(CodD, sample):
... print result
...
['M', 'K']
['M', 'K', 'K', 'T', 'K', 'N', 'Q', 'F', 'V', 'T']