如何将 MMAP 文件转换为另一种文件类型？

如何解决如何将 MMAP 文件转换为另一种文件类型？

我正在用 python 编写一些代码，将文件（jpeg）作为 MMAP 文件加载，以便它可以直接编辑一些十六进制数据。

这很好，我对我正在苦苦挣扎的那顶帽子没有问题，正在获取编辑过的 MMAP 文件（我已将其保存为变量“final”）返回 em> 转换成 JPEG 格式。

您可以在下面看到我用来打开和编辑文件的代码：

2021-06-19 23:19:01 [scrapy.utils.log] INFO: Scrapy 2.5.0 started (bot: my_scrapy)
2021-06-19 23:19:01 [scrapy.utils.log] INFO: Versions: lxml 4.6.3.0,libxml2 2.9.5,cssselect 
1.1.0,parsel 1.6.0,w3lib 1.22.0,Twisted 21.2.0,Python 3.9.0 (tags/v3.9.0:9cf6752,Oct  5 
2020,15:34:40) [MSC v.1927 64 bit (AMD64)],pyOpenSSL 20.0.1 (OpenSSL 1.1.1k  25 Mar 2021),cryptography 3.4.7,Platform Windows-10-10.0.19041-SP0
2021-06-19 23:19:01 [scrapy.utils.log] DEBUG: Using reactor: 
twisted.internet.selectreactor.SelectReactor
2021-06-19 23:19:01 [scrapy.crawler] INFO: Overridden settings:
{'BOT_NAME': 'my_scrapy','NEWSPIDER_MODULE': 'my_scrapy.spiders','ROBOTSTXT_OBEY': True,'SPIDER_MODULES': ['my_scrapy.spiders']}
2021-06-19 23:19:01 [scrapy.extensions.telnet] INFO: Telnet Password: 1a9440bbf933d074
2021-06-19 23:19:01 [scrapy.middleware] INFO: Enabled extensions:
['scrapy.extensions.corestats.CoreStats','scrapy.extensions.telnet.TelnetConsole','scrapy.extensions.logstats.LogStats']
2021-06-19 23:19:02 [scrapy.middleware] INFO: Enabled downloader middlewares:
['scrapy.downloadermiddlewares.robotstxt.RobotsTxtMiddleware','scrapy.downloadermiddlewares.httpauth.HttpAuthMiddleware','scrapy.downloadermiddlewares.downloadtimeout.DownloadTimeoutMiddleware','scrapy.downloadermiddlewares.defaultheaders.DefaultHeadersMiddleware','scrapy.downloadermiddlewares.useragent.UserAgentMiddleware','scrapy.downloadermiddlewares.retry.RetryMiddleware','scrapy.downloadermiddlewares.redirect.MetaRefreshMiddleware','scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware','scrapy.downloadermiddlewares.redirect.RedirectMiddleware','scrapy.downloadermiddlewares.cookies.CookiesMiddleware','scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware','scrapy.downloadermiddlewares.stats.DownloaderStats']
 2021-06-19 23:19:02 [scrapy.middleware] INFO: Enabled spider middlewares:
['scrapy.spidermiddlewares.httperror.HttpErrorMiddleware','scrapy.spidermiddlewares.offsite.OffsiteMiddleware','scrapy.spidermiddlewares.referer.RefererMiddleware','scrapy.spidermiddlewares.urllength.UrlLengthMiddleware','scrapy.spidermiddlewares.depth.DepthMiddleware']
2021-06-19 23:19:02 [scrapy.middleware] INFO: Enabled item pipelines:
[]
2021-06-19 23:19:02 [scrapy.core.engine] INFO: Spider opened
2021-06-19 23:19:02 [scrapy.extensions.logstats] INFO: Crawled 0 pages (at 0 pages/min),scraped 0 items (at 0 items/min)
2021-06-19 23:19:02 [scrapy.extensions.telnet] INFO: Telnet console listening on 
127.0.0.1:6023
2021-06-19 23:19:02 [scrapy.core.engine] INFO: Closing spider (finished)
2021-06-19 23:19:02 [scrapy.statscollectors] INFO: Dumping Scrapy stats:
{'elapsed_time_seconds': 0.008228,'finish_reason': 'finished','finish_time': datetime.datetime(2021,6,19,17,49,2,99933),'log_count/INFO': 10,'start_time': datetime.datetime(2021,91705)}
2021-06-19 23:19:02 [scrapy.core.engine] INFO: Spider closed (finished)

如果有人可以帮助我将 MMAP 文件保存为 JPG 或向我展示实现类似结果的其他方法（编辑十六进制数据并保存文件），我将不胜感激