在python中编辑文本文件并创建一个新文件
在python中编辑文本文件并创建一个新文件
提问于 2018-06-02 05:56:54
我有一个这样的文本文件：
>ENST00000511961.1|ENSG00000013561.13|OTTHUMG00000129660.5|OTTHUMT00000370661.3|RNF14-003|RNF14|278
MSSEDREAQEDELLALASIYDGDEFRKAESVQGGETRIYLDLPQNFKIFVSGNSNECLQNSGFEYTICFLPPLVLNFELPPDYPSSSPPSFTLSGKWLSPTQLSALCKHLDNLWEEHRGSVVLFAWMQFLKEETLAYLNIVSPFELKIGSQKKVQRRTAQASPNTELDFGGAAGSDVDQEEIVDERAVQDVESLSNLIQEILDFDQAQQIKCFNSKLFLCSICFCEKLGSECMYFLECRHVYCKACLKDYFEIQIRDGQVQCLNCPEPKCPSVATPGQ
>ENST00000506822.1|ENSG00000013561.13|OTTHUMG00000129660.5|OTTHUMT00000370662.1|RNF14-004|GAPDH|132
MSSEDREAQEDELLALASIYDGDEFRKAESVQGGETRIYLDLPQNFKIFVSGNSNECLQNSGFEYTICFLPPLVLNFELPPDYPSSSPPSFTLSGKWLSPTQLSALCKHLDNLWEEHRGSVVLFAWMQFLKE
>ENST00000513019.1|ENSG00000013561.13|OTTHUMG00000129660.5|OTTHUMT00000370663.1|RNF14-005|ACTB|99
MSSEDREAQEDELLALASIYDGDEFRKAESVQGGETRIYLDLPQNFKIFVSGNSNECLQNSGFEYTICFLPPLVLNFELPPDYPSSSPPSFTLSGKWLS
>ENST00000356143.1|ENSG00000013561.13|OTTHUMG00000129660.5|-|RNF14-202|HELLE|474
MSSEDREAQEDELLALASIYDGDEFRKAESVQGGETRIYLDLPQNFKIFVSGNSNECLQNSGFEYTICFLPPLVLNFELPPDYPSSSPPSFTLSGKWLSPTQLSALCKHLDNLWEEHRGSVVLFAWMQFLKEETLAYLNIVSPFELKIGSQKKVQRRTAQASPNTELDFGGAAGSDVDQEEIVDERAVQDVESLSNLIQEILDFDQAQQIKCFNSKLFLCSICFCEKLGSECMYFLECRHVYCKACLKDYFEIQIRDGQVQCLNCPEPKCPSVATPGQVKELVEAELFARYDRLLLQSSLDLMADVVYCPRPCCQLPVMQEPGCTMGICSSCNFAFCTLCRLTYHGVSPCKVTAEKLMDLRNEYLQADEANKRLLDQRYGKRVIQKAL我想在python中为以">“开头的行的第6个元素创建一个list。为此，我首先在python中创建一个dictionary，然后关键字应该是我想要的list。如下所示：
from itertools import groupby
with open('infile.txt') as f:
groups = groupby(f, key=lambda x: not x.startswith(">"))
d = {}
for k,v in groups:
if not k:
key, val = list(v)[0].rstrip(), "".join(map(str.rstrip,next(groups)[1],""))
d[key] = val
k = d.keys()
res = [el[5:] for s in k for el in s.split("|")]但它返回以">".开头的行中的所有元素
你知道怎么修吗？
以下是预期输出：
["RNF14", "GAPDH", "ACTB", "HELLE"]回答 1
Stack Overflow用户
发布于 2018-06-02 06:25:16
使用过滤器而不是groupby和map的解决方案
with open('infile.txt') as f:
lines = f.readlines()
groups = filter(lambda x: x.startswith(">"), lines)
res = list(map(lambda x: x.split('|')[5],groups))页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/50651429
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