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file-str-replace模块实现文件字符串批量替换

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是一个独立的 JavaScript 模块,其主要功能是在文件中查找并替换字符串。此模块被设计用于处理文件内容的快速替换需求,支持同步与异步的替换方式。使用该模块,开发者可以在文件内容中定位特定的字符串模式,并将它们替换成新的字符串。 详细知识点如下: 1. 文件替换概念:在软件开发和文件处理中,文件替换是指在源文件中查找指定的字符串或正则表达式模式,并将其替换为另一种字符串的过程。这种操作在前端工程化、模板处理、自动化脚本编写等场景中非常常见。 2. 独立模块的优势:一个独立模块通常意味着它是一个封装好的功能单元,可以被多种不同的应用程序或脚本重用。独立模块化设计有利于降低代码的耦合度,提高代码的可维护性和可扩展性。 3. npm 安装方法:在使用 "file-str-replace" 模块之前,需要通过 npm(Node Package Manager,即 Node.js 包管理器)进行安装。npm 是 Node.js 的官方包管理工具,允许用户以命令行的形式下载、安装和管理 Node.js 的软件包。使用 "npm install --save-dev file-str-replace" 命令将模块添加到项目的开发依赖中,意味着该模块只在开发环境下需要。 4. 用法说明:模块的使用方式是首先通过 require() 函数加载模块。然后可以通过调用模块的 replace() 方法执行异步替换操作,或者使用 replaceSync() 方法执行同步替换操作。这两个方法都接受四个参数:目标文件名、正则表达式模式、要替换成的新字符串以及一个可选的回调函数,回调函数会在替换操作完成后被调用,提供处理后的文件内容。 5. 正则表达式应用:在 "file-str-replace" 模块的用法示例中,使用了正则表达式(/ [0-9]/g)来匹配文件中所有的数字,并将它们替换为字符串 '<3'。正则表达式是一种强大的文本处理工具,用于搜索、匹配和替换文本模式。在这个示例中,“g”标志表示全局搜索,不局限于第一个匹配项。 6. JavaScript 回调函数:在异步替换操作中,模块提供了一个回调函数作为参数。在 JavaScript 中,回调函数是一种常见的控制异步流程的模式。异步函数执行完毕后,会调用提供的回调函数,并将结果作为参数传递给该函数。 7. 压缩包子文件的文件名称列表:这里的 "file-str-replace-master" 指向的是模块的源代码压缩包的名称。通常,这种名称用于GitHub等代码托管服务中,标识该模块源代码的压缩文件。开发者在源代码控制系统中检出对应的分支或标签,然后解压该文件即可获得模块的源代码。 总的来说,"file-str-replace" 是一个实用的 JavaScript 模块,可以简化文件内容替换的复杂性,并通过 npm 包管理器轻松集成到项目中。通过学习和掌握该模块的使用,开发者可以大幅提升处理文件字符串替换任务的效率。

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(base) PS D:\2025\internship\pachong\py\my12306> scrapy crawl train 2025-07-15 16:31:48 [scrapy.utils.log] INFO: Scrapy 2.11.1 started (bot: my12306) 2025-07-15 16:31:48 [scrapy.utils.log] INFO: Versions: lxml 5.2.1.0, libxml2 2.13 .1, cssselect 1.2.0, parsel 1.8.1, w3lib 2.1.2, Twisted 23.10.0, Python 3.12.7 | packaged by Anaconda, Inc. | (main, Oct 4 2024, 13:17:27) [MSC v.1929 64 bit (AM D64)], pyOpenSSL 24.2.1 (OpenSSL 3.0.15 3 Sep 2024), cryptography 43.0.0, Platform Windows-11-10.0.26100-SP0 2025-07-15 16:31:48 [scrapy.addons] INFO: Enabled addons: [] 2025-07-15 16:31:48 [py.warnings] WARNING: D:\anaconda\Lib\site-packages\scrapy\u tils\request.py:254: ScrapyDeprecationWarning: '2.6' is a deprecated value for the 'REQUEST_FINGERPRINTER_IMPLEMENTATION' setting. It is also the default value. In other words, it is normal to get this warning if you have not defined a value for the 'REQUEST_FINGERPRINTER_IMPLEMENTATION' sett ing. This is so for backward compatibility reasons, but it will change in a future version of Scrapy. See the documentation of the 'REQUEST_FINGERPRINTER_IMPLEMENTATION' setting for information on how to handle this deprecation. return cls(crawler) 2025-07-15 16:31:48 [scrapy.extensions.telnet] INFO: Telnet Password: b500c51afa127fa5 2025-07-15 16:31:48 [scrapy.middleware] INFO: Enabled extensions: ['scrapy.extensions.corestats.CoreStats', 'scrapy.extensions.telnet.TelnetConsole', 'scrapy.extensions.logstats.LogStats', 'scrapy.extensions.throttle.AutoThrottle'] 2025-07-15 16:31:48 [scrapy.crawler] INFO: Overridden settings: {'AUTOTHROTTLE_ENABLED': True, 'AUTOTHROTTLE_START_DELAY': 10, 'BOT_NAME': 'my12306', 'DOWNLOADER_CLIENT_TLS_METHOD': 'TLSv1.2', 'DOWNLOAD_DELAY': 5, 'DOWNLOAD_TIMEOUT': 15, 'LOG_LEVEL': 'INFO', 'NEWSPIDER_MODULE': 'my12306.spiders', 'RETRY_HTTP_CODES': [302, 403, 404, 500, 502, 503, 504], 'RETRY_TIMES': 5, 'SPIDER_MODULES': ['my12306.spiders']} 2025-07-15 16:31:49 [scrapy.middleware] INFO: Enabled downloader middlewares: ['scrapy.downloadermiddlewares.httpauth.HttpAuthMiddleware', 'scrapy.downloadermiddlewares.downloadtimeout.DownloadTimeoutMiddleware', 'scrapy.downloadermiddlewares.defaultheaders.DefaultHeadersMiddleware', 'my12306.middlewares.RandomUserAgentMiddleware', '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'] 2025-07-15 16:31:49 [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'] 2025-07-15 16:31:49 [scrapy.middleware] INFO: Enabled item pipelines: ['my12306.pipelines.JsonWriterPipeline'] 2025-07-15 16:31:49 [scrapy.core.engine] INFO: Spider opened 2025-07-15 16:31:49 [scrapy.extensions.logstats] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min) 2025-07-15 16:31:49 [scrapy.extensions.telnet] INFO: Telnet console listening on 127.0.0.1:6023 2025-07-15 16:31:55 [scrapy.core.scraper] ERROR: Spider error processing <GET htt ps://kyfw.12306.cn/otn/login/init> (referer: https://kyfw.12306.cn/otn/index/init) Traceback (most recent call last): File "D:\2025\internship\pachong\py\my12306\my12306\spiders\train_spider.py", line 16, in safe_selector return Selector(response) ^^^^^^^^^^^^^^^^^^ File "D:\anaconda\Lib\site-packages\scrapy\selector\unified.py", line 97, in __init__ super().__init__(text=text, type=st, **kwargs) File "D:\anaconda\Lib\site-packages\parsel\selector.py", line 496, in __init__ root, type = _get_root_and_type_from_text( ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\anaconda\Lib\site-packages\parsel\selector.py", line 377, in _get_root_and_type_from_text root = _get_root_from_text(text, type=type, **lxml_kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\anaconda\Lib\site-packages\parsel\selector.py", line 329, in _get_root_from_text return create_root_node(text, _ctgroup[type]["_parser"], **lxml_kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\anaconda\Lib\site-packages\parsel\selector.py", line 110, in create_root_node parser = parser_cls(recover=True, encoding=encoding, huge_tree=True) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\anaconda\Lib\site-packages\lxml\html\__init__.py", line 1887, in __init__ super().__init__(**kwargs) File "src\\lxml\\parser.pxi", line 1806, in lxml.etree.HTMLParser.__init__ File "src\\lxml\\parser.pxi", line 858, in lxml.etree._BaseParser.__init__ LookupError: unknown encoding: 'b'utf8'' During handling of the above exception, another exception occurred: Traceback (most recent call last): File "D:\anaconda\Lib\site-packages\scrapy\utils\defer.py", line 279, in iter_errback yield next(it) ^^^^^^^^ File "D:\anaconda\Lib\site-packages\scrapy\utils\python.py", line 350, in __next__ return next(self.data) ^^^^^^^^^^^^^^^ File "D:\anaconda\Lib\site-packages\scrapy\utils\python.py", line 350, in __next__ return next(self.data) ^^^^^^^^^^^^^^^ File "D:\anaconda\Lib\site-packages\scrapy\core\spidermw.py", line 106, in process_sync for r in iterable: File "D:\anaconda\Lib\site-packages\scrapy\spidermiddlewares\offsite.py", line 28, in <genexpr> return (r for r in result or () if self._filter(r, spider)) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\anaconda\Lib\site-packages\scrapy\core\spidermw.py", line 106, in process_sync for r in iterable: File "D:\anaconda\Lib\site-packages\scrapy\spidermiddlewares\referer.py", line 352, in <genexpr> return (self._set_referer(r, response) for r in result or ()) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\anaconda\Lib\site-packages\scrapy\core\spidermw.py", line 106, in process_sync for r in iterable: File "D:\anaconda\Lib\site-packages\scrapy\spidermiddlewares\urllength.py", line 27, in <genexpr> return (r for r in result or () if self._filter(r, spider)) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\anaconda\Lib\site-packages\scrapy\core\spidermw.py", line 106, in process_sync for r in iterable: File "D:\anaconda\Lib\site-packages\scrapy\spidermiddlewares\depth.py", line 31, in <genexpr> return (r for r in result or () if self._filter(r, response, spider)) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\anaconda\Lib\site-packages\scrapy\core\spidermw.py", line 106, in process_sync for r in iterable: File "D:\2025\internship\pachong\py\my12306\my12306\spiders\train_spider.py", line 241, in login_page sel = safe_selector(response) ^^^^^^^^^^^^^^^^^^^^^^^ File "D:\2025\internship\pachong\py\my12306\my12306\spiders\train_spider.py", line 31, in safe_selector return ParselSelector(text=text, type='html', encoding=encoding) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\anaconda\Lib\site-packages\parsel\selector.py", line 496, in __init__ root, type = _get_root_and_type_from_text( ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\anaconda\Lib\site-packages\parsel\selector.py", line 377, in _get_root_and_type_from_text root = _get_root_from_text(text, type=type, **lxml_kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\anaconda\Lib\site-packages\parsel\selector.py", line 329, in _get_root_from_text return create_root_node(text, _ctgroup[type]["_parser"], **lxml_kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\anaconda\Lib\site-packages\parsel\selector.py", line 110, in create_root_node parser = parser_cls(recover=True, encoding=encoding, huge_tree=True) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\anaconda\Lib\site-packages\lxml\html\__init__.py", line 1887, in __init__ super().__init__(**kwargs) File "src\\lxml\\parser.pxi", line 1806, in lxml.etree.HTMLParser.__init__ File "src\\lxml\\parser.pxi", line 858, in lxml.etree._BaseParser.__init__ LookupError: unknown encoding: 'b'utf8'' 2025-07-15 16:32:02 [train] INFO: 成功加载 3399 个车站信息 2025-07-15 16:32:02 [train] INFO: 部分车站示例: [('北京北', 'VAP'), ('北京东', 'BOP'), ('北京', 'BJP'), ('北京南', 'VNP'), ('北京大兴', 'IPP')] 请输入出发站: 北京 请输入到达站: 北京北 请输入日期(格式: yyyymmdd): 20250720 2025-07-15 16:33:01 [scrapy.extensions.logstats] INFO: Crawled 3 pages (at 3 pages/min), scraped 0 items (at 0 items/min) 2025-07-15 16:33:38 [scrapy.downloadermiddlewares.retry] ERROR: Gave up retrying <GET https://www.12306.cn/mormhweb/logFiles/error.html> (failed 6 times): [<twist ed.python.failure.Failure twisted.internet.error.ConnectionLost: Connection to the other side was lost in a non-clean fashion: Connection lost.>] 2025-07-15 16:33:38 [scrapy.core.scraper] ERROR: Error downloading <GET https://www.12306.cn/mormhweb/logFiles/error.html> Traceback (most recent call last): File "D:\anaconda\Lib\site-packages\scrapy\core\downloader\middleware.py", line 54, in process_request return (yield download_func(request=request, spider=spider)) twisted.web._newclient.ResponseNeverReceived: [<twisted.python.failure.Failure tw isted.internet.error.ConnectionLost: Connection to the other side was lost in a non-clean fashion: Connection lost.>] 2025-07-15 16:33:38 [scrapy.core.engine] INFO: Closing spider (finished) 2025-07-15 16:33:38 [scrapy.statscollectors] INFO: Dumping Scrapy stats: {'downloader/exception_count': 6, 'downloader/exception_type_count/twisted.web._newclient.ResponseNeverReceived': 6, 'downloader/request_bytes': 5916, 'downloader/request_count': 10, 'downloader/request_method_count/GET': 10, 'downloader/response_bytes': 86615, 'downloader/response_count': 4, 'downloader/response_status_count/200': 3, 'downloader/response_status_count/302': 1, 'elapsed_time_seconds': 109.671222, 'finish_reason': 'finished', 'finish_time': datetime.datetime(2025, 7, 15, 8, 33, 38, 966742, tzinfo=datetime.timezone.utc), 'httpcompression/response_bytes': 230430, 'httpcompression/response_count': 3, 'log_count/ERROR': 3, 'log_count/INFO': 13, 'log_count/WARNING': 1, 'request_depth_max': 2, 'response_received_count': 3, 'retry/count': 5, 'retry/max_reached': 1, 'retry/reason_count/twisted.web._newclient.ResponseNeverReceived': 5, 'scheduler/dequeued': 10, 'scheduler/dequeued/memory': 10, 'scheduler/enqueued': 10, 'scheduler/enqueued/memory': 10, 'spider_exceptions/LookupError': 1, 'start_time': datetime.datetime(2025, 7, 15, 8, 31, 49, 295520, tzinfo=datetime.timezone.utc)} 2025-07-15 16:33:38 [scrapy.core.engine] INFO: Spider closed (finished) (base) PS D:\2025\internship\pachong\py\my12306>