如何在python中逐字抓取数字 [英] How to grab number after word in python

问题描述

我有一个巨大的文件，其中包含以下几行 DDD-1126N|refseq:NP_285726|uniprotkb:P00112 和 DDD-1081N|uniprotkb:P12121，我想抓取uniprotkb 后面的数字.

I have a huge file containing the following lines DDD-1126N|refseq:NP_285726|uniprotkb:P00112 and DDD-1081N|uniprotkb:P12121, I want to grab the number after uniprotkb.

这是我的代码:

x = 'uniprotkb:P'
f = open('m.txt')
for line in f:
  print line.find(x) 
  print line[36:31 + len(x)]

line.find(x) 中的问题是 10 和 26，当它是 26 时我抓取完整的数字.我是编程新手，所以我正在寻找可以抓取的东西单词后的完整数字.

The problem in line.find(x) is 10 and 26, I grab the complete number when it is 26. I'm new to programming, so I'm looking for something to grab the complete number after the word.

x = 'uniprotkb:'
f = open('m.txt')
for line in f:
  if x in line:
    print the number after x

推荐答案

使用正则表达式:

import re
for line in open('m.txt'):
    match = re.search('uniprotkb:P(\d+)', line)
    if match:
        print match.group(1)

这篇关于如何在python中逐字抓取数字的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！