我目前正在尝试将python脚本翻译成ruby。现在我被困在一个使用原始字符串作为正则表达式的部件上。
这是python的原始代码：

pat = re.compile(r'.{4}\xAA\xEE\xAA\x76\x1B\xEC\xBB\x20\xF1\xE6\x51.{1}\x78\x9C')
match = pat.search(string)
(start_match, end_match) = match.span()

这是我试图将其转换为ruby的尝试：

pat = Regexp.compile('.{4}\\xAA\\xEE\\xAA\\x76\\x1B\\xEC\\xBB\\x20\\xF1\\xE6\\x51.{1}\\x78\\x9C')
start_match, end_match = string.enum_for(:scan, pat).map { Regexp.last_match.begin(0) }

不幸的是，我一定是做错了，因为我遇到了以下错误：

invalid multibyte escape: /.{4}\\xAA\\xEE\\xAA\\x76\\x1B\\xEC\\xBB\\x20\\xF1\\xE6\\x51.{1}\\x78\\x9C/ (RegexpError)

我还尝试：

regex_String = <<'TEXT'
.{4}\xAA\xEE\xAA\x76\x1B\xEC\xBB\x20\xF1\xE6\x51.{1}\x78\x9C
TEXT
pat = Regexp.compile(regex_String)
start_match, end_match = string.enum_for(:scan, pat).map { Regexp.last_match.begin(0) }

但它会导致同样的错误。
要将其置于上下文中，以下是整个脚本：

# Commented lines are the original python code

# Uncommented lines are the translated ruby code

# import zlib

# import sys

# import re

# import binascii

require "zlib"
require "hex_string"

# if(len(sys.argv) < 2 or sys.argv[1] == "-h"):

# print "usage: python DecompNewDell.py <biosupdate.exe>"

# exit()

if ARGV.length < 1 or ARGV[0] == "-h"
    puts "usage: ruby DecompNewDell.rb <biosupdate.exe>";
    exit
end

# f = open(sys.argv[1], "rb")

# string = f.read()

f = File.open(ARGV[0], 'rb')
string = f.read

# pat = re.compile(r'.{4}\xAA\xEE\xAA\x76\x1B\xEC\xBB\x20\xF1\xE6\x51.{1}\x78\x9C')

# match = pat.search(string)

# (start_match, end_match) = match.span()

pat = Regexp.compile('.{4}\\xAA\\xEE\\xAA\\x76\\x1B\\xEC\\xBB\\x20\\xF1\\xE6\\x51.{1}\\x78\\x9C')
start_match, end_match = string.enum_for(:scan, pat).map { Regexp.last_match.begin(0) }

# compessed_len = string[start_match:start_match+4]

compressed_len = string[start_match..start_match+4]

# compessed_len = binascii.b2a_hex(compessed_len[::-1])

compessed_len.reverse!
compessed_len = compessed_len.to_hex_string(false)

# compessed_len = long(compessed_len, 16)

compessed_len = compessed_len.to_i(16)

# read len bytes out of the file into the new string to decompress

# f.seek(start_match+16)

# string = f.read(compessed_len)

f.seek start_match+16
string = f.read compessed_len

# o = zlib.decompress(string)

o = Zlib::Inflate.inflate(string)

# f2 = open(sys.argv[1] + "_decompressed.hdr", "wb")

# f2.write(o)

# f.close()

# f2.close()

# print "Decompressed data written to %s_decompressed.hdr" % sys.argv[1]

f2 = File.open(ARGV[0] + "_decompressed.hdr", 'wb')
f2.write(o)
f.close()
f2.close()
puts "Decompressed data written to #{ARGV[0]}_decompressed.hdr"