Python 提取两个子字符串之间匹配的字符串部分

我有三个包含一组字符串的文件。File1和File2包含File3的子字符串。我想从File3中减去位于File1和File2中的子字符串之间的字符串。请参见下面的示例：

文件1（子字符串1）：

文件2（子字符串2）

文件3

例如：

                                 String in File1                       String in  File2
                              AGGGCUUAGCUGCUUGUGAGCA                   UUCACAGUGGCUAAGUUCCGC
String in File3      CUGAGGAGCAGGGCUUAGCUGCUUGUGAGCAGGGUCCACACCAAGUCGUGUUCACAGUGGCUAAGUUCCGCCCCCCAG

此示例的输出：

GGGUCCACACCAAGUCGUG

---

在R中有一个解决方案：

file1 <- "AGGGCUUAGCUGCUUGUGAGCA"
file2 <- "UUCACAGUGGCUAAGUUCCGC"
file3 <- "CUGAGGAGCAGGGCUUAGCUGCUUGUGAGCAGGGUCCACACCAAGUCGUGUUCACAGUGGCUAAGUUCCGCCCCCCAG"

# create a regular expression
pattern <- paste0(".*", file1, "(.*)", file2, ".*")

# extract the substring
sub(pattern, "\\1", file3)
# [1] "GGGUCCACACCAAGUCGUG"

python中的
file1

>>> a='AGGGCUUAGCUGCUUGUGAGCA'
>>> b='UUCACAGUGGCUAAGUUCCGC'
>>> c='CUGAGGAGCAGGGCUUAGCUGCUUGUGAGCAGGGUCCACACCAAGUCGUGUUCACAGUGGCUAAGUUCCGCCCCCCAG'
>>> regex = a + '(.*?)' + b
>>> regex
'AGGGCUUAGCUGCUUGUGAGCA(.*?)UUCACAGUGGCUAAGUUCCGC'
>>> re.findall(regex,c)
['GGGUCCACACCAAGUCGUG']

使用gsubfn中的
Straplyc
尝试此操作。我们假设只有一个
s1
和
s2
实例，或者如果有多个实例，您希望字符串位于
s1
的第一个实例和
s2
的最后一个实例之间。如果可能有多个实例，并且您想要不同的内容，请将此添加到问题中

s1 <- "AGGGCUUAGCUGCUUGUGAGCA"
s2 <- "UUCACAGUGGCUAAGUUCCGC"
s3 <- "CUGAGGAGCAGGGCUUAGCUGCUUGUGAGCAGGGUCCACACCAAGUCGUGUUCACAGUGGCUAAGUUCCGCCCCCCAG"

library(gsubfn)
fn$strapplyc(s3, "$s1(.*)$s2", simplify = TRUE)
##  [1] "GGGUCCACACCAAGUCGUG"

python中的s1代码
`
string1 = "AGGGCUUAGCUGCUUGUGAGCA"
    string2 = "UUCACAGUGGCUAAGUUCCGC"
    string_main = "CUGAGGAGCAGGGCUUAGCUGCUUGUGAGCAGGGUCCACACCAAGUCGUGUUCACAGUGGCUAAGUUCCGCCCCCCAG"
    print string_main[string_main.find(string1)+len(string1):string_main.find(string2)]
string1=“agggcuagcuugca”
string2=“uucacagugggcuaaguuccgc”
string_main=“cugaggagggcuagcuugcuugugugugguccacacacagugugugugugucagugcuagagugcuagugcuagugucccccag”
打印string\u main[string\u main.find（string1）+len（string1）：string\u main.find（string2）]
在Perl中，您可以尝试以下代码：

use strict;
use warnings;

my $file1 = "AGGGCUUAGCUGCUUGUGAGCA";
my $file2 = "UUCACAGUGGCUAAGUUCCGC";
my $file3 = "CUGAGGAGCAGGGCUUAGCUGCUUGUGAGCAGGGUCCACACCAAGUCGUGUUCACAGUGGCUAAGUUCCGCCCCCCAG";

my ($result) = $file3 =~ /$file1(.*?)$file2/;

print $result;

产出：

GGGUCCACACCAAGUCGUG

根据您给定的输入，以下操作将起作用

f1 <- "AGGGCUUAGCUGCUUGUGAGCA"
f2 <- "UUCACAGUGGCUAAGUUCCGC"
f3 <- "CUGAGGAGCAGGGCUUAGCUGCUUGUGAGCAGGGUCCACACCAAGUCGUGUUCACAGUGGCUAAGUUCCGCCCCCCAG"
strsplit(f3, paste(f1, f2, sep='|'))[[1]][2]
# [1] "GGGUCCACACCAAGUCGUG"

f1在R中使用
qdapRegex

f1 <- "AGGGCUUAGCUGCUUGUGAGCA"
f2 <- "UUCACAGUGGCUAAGUUCCGC"
f3 <- "CUGAGGAGCAGGGCUUAGCUGCUUGUGAGCAGGGUCCACACCAAGUCGUGUUCACAGUGGCUAAGUUCCGCCCCCCAG"

library(qdapRegex)
rm_between(f3, f1, f2, extract=TRUE)

## [[1]]
## [1] "GGGUCCACACCAAGUCGUG"

f1这两个子字符串是什么？将您的代码放在这里，然后我们可以查看您正面临问题的位置。我已编辑了我的问题。我在文件1、2和3中有多个字符串。@user3741035是否要使用文件1和文件2中所有字符串的组合？
GGGUCCACACCAAGUCGUG

f1 <- "AGGGCUUAGCUGCUUGUGAGCA"
f2 <- "UUCACAGUGGCUAAGUUCCGC"
f3 <- "CUGAGGAGCAGGGCUUAGCUGCUUGUGAGCAGGGUCCACACCAAGUCGUGUUCACAGUGGCUAAGUUCCGCCCCCCAG"
strsplit(f3, paste(f1, f2, sep='|'))[[1]][2]
# [1] "GGGUCCACACCAAGUCGUG"

f1 <- "AGGGCUUAGCUGCUUGUGAGCA"
f2 <- "UUCACAGUGGCUAAGUUCCGC"
f3 <- "CUGAGGAGCAGGGCUUAGCUGCUUGUGAGCAGGGUCCACACCAAGUCGUGUUCACAGUGGCUAAGUUCCGCCCCCCAG"

library(qdapRegex)
rm_between(f3, f1, f2, extract=TRUE)

## [[1]]
## [1] "GGGUCCACACCAAGUCGUG"