好吧,我似乎无法heredoc在我的foo.php文件中的块内添加注释:
echo <<<_HEREDOC_FOO
// okay this comment was intended to explain the code below but it
// is showing up on the web page HTML sent to the browser
<form action="foo.php" method="post">
<input type="submit" value="DELETE RECORD" /></form>
_HEREDOC_FOO;
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该表单是否有效,确定(顺便提一下上面的表单代码是为了我的问题而高度截断).
但dang comment(okay this comment was..blah blah blah)也出现在浏览器中.它在浏览器中显示如上所示:
// okay this comment was intended to explain the code below but it
// is showing up on the web page HTML sent to the browser …Run Code Online (Sandbox Code Playgroud) $var = "a
b // I want to comment here but it becomes a string instead
c"
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我想在PHP中的多行字符串中间插入注释,但我不能.我试过/**/,//和#.
有谁知道怎么做?
我尝试使用Robomongo连接到AWS中的MongoDB.当我连接时,我收到此错误:
Cannot connect to the MongoDB at x.x.x.x:27017
Error:
Missing expected field "mechanism"
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有谁知道如何解决这个错误?我已经打开了27017端口0.0.0.0.
我使用 Scrapy FakeUserAgent 并在我的 Linux 服务器上不断收到此错误。
Traceback (most recent call last):
File "/usr/local/lib64/python2.7/site-packages/twisted/internet/defer.py", line 1299, in _inlineCallbacks
result = g.send(result)
File "/usr/local/lib/python2.7/site-packages/scrapy/core/downloader/middleware.py", line 37, in process_request
response = yield method(request=request, spider=spider)
File "/usr/local/lib/python2.7/site-packages/scrapy_fake_useragent/middleware.py", line 27, in process_request
request.headers.setdefault('User-Agent', self.ua.random)
File "/usr/local/lib/python2.7/site-packages/fake_useragent/fake.py", line 98, in __getattr__
raise FakeUserAgentError('Error occurred during getting browser') # noqa
FakeUserAgentError: Error occurred during getting browser
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当我同时运行多个蜘蛛时,我在 Linux 服务器上不断收到此错误。这个错误在我自己的笔记本电脑上很少发生。我应该怎么做才能避免这种情况?我需要提高内存还是其他什么?服务器的规格为 512MB RAM 和 1 个 vCPU。
我是网络编程的新手。我想构建一个用于通过Python在Foursquare中搜寻社交图的搜寻器。通过使用该apiv2库,我有一个“手动”控制的搜寻器。主要方法如下:
def main():
CODE = "******"
url = "https://foursquare.com/oauth2/authenticate?client_id=****&response_type=code&redirect_uri=****"
key = "***"
secret = "****"
re_uri = "***"
auth = apiv2.FSAuthenticator(key, secret, re_uri)
auth.set_token(code)
finder = apiv2.UserFinder(auth)
#DO SOME REQUIRES By USING THE FINDER
finder.finde(ANY_USER_ID).mayorships()
bla bla bla
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问题是,目前,我必须在浏览器中键入URL,并从重定向URL中获取CODE,然后在程序中更新CODE,然后再次运行它。我认为可能会有一些方法可以对CODE进行编码,从而使当前程序有所进展并使其自动化。
任何指令或示例代码表示赞赏。
到目前为止,这是我的正则表达式:
^((([a-zA-Z0-9_\/-]+)[ ])+((\bPHONE_NUMBER\b)|(\b(IP|EMAIL)_ADDRESS\b))[ ]*[;]*[ ]*)+$
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;如果我(([a-zA-Z0-9_\/-]+)[ ])+((\bPHONE_NUMBER\b)|(\b(IP|EMAIL)_ADDRESS\b))在第一个之后找到另一个,我想至少制作一个强制性的.
/tests/phone PHONE_NUMBER ; /tests/IP IP_ADDRESS 应该匹配.
/tests/phone PHONE_NUMBER /tests/IP IP_ADDRESS 不应该匹配.
我怎样才能做到这一点?
我正在尝试验证String包含一个人的名字和姓氏的 a 。可接受的名称格式如下。
Bruce Schneier \nSchneier, Bruce\nSchneier, Bruce Wayne\nO\xe2\x80\x99Malley, John F.\nJohn O\xe2\x80\x99Malley-Smith\nCher\nRun Code Online (Sandbox Code Playgroud)\n\n我想出了以下程序来验证字符串变量。如果名称格式与任何提到的格式匹配,该validateName函数应该返回。true否则它应该返回false。
import java.util.regex.*;\n\npublic class telephone {\n\n public static boolean validateName (String txt){\n String regx = "^[\\\\\\\\p{L} .\'-]+$";\n Pattern pattern = Pattern.compile(regx, Pattern.CASE_INSENSITIVE);\n Matcher matcher = pattern.matcher(txt);\n return matcher.find();\n\n }\n\n public static void main(String args[]) {\n\n String name = "Ron O\xe2\x80\x99\xe2\x80\x99Henry";\n\n System.out.println(validateName(name));\n\n }\n}\nRun Code Online (Sandbox Code Playgroud)\n\n但由于某种原因,它正在返回false任何值。我在这里做错了什么?
当我尝试在Elastic Beanstalk CLI上设置SSH密钥时,我收到了此错误:
ERROR: SSH is not installed. You must install SSH before continuing.
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我之前通常不会收到此错误.也许以前,当我安装其他东西时,SSH自动安装,但我现在错过了它.
在Python中有很多方法可以设置输出缓冲:禁用输出缓冲
让我好奇的是我怎么知道输出缓冲真的已经关闭了?检查它的最佳和简单方法是什么?
我试图以非常基本的方式抓取网站.但Scrapy没有抓取所有链接.我会解释如下情况─
main_page.html - >包含指向a_page.html,b_page.html,c_page.html的
链接a_page.html - >包含指向a1_page.html的链接,a2_page.html
b_page.html - >包含指向b1_page.html,b2_page.html
c_page的链接.html - >包含指向c1_page.html的链接,c2_page.html
a1_page.html - >包含指向b_page.html的链接
a2_page.html - >包含指向c_page.html的链接
b1_page.html - >包含指向a_page.html的链接
b2_page.html - >包含指向c_page.html的链接
c1_page.html - >包含指向a_page.html的链接
c2_page.html - >包含指向main_page.html的链接
我在CrawlSpider中使用以下规则 -
Rule(SgmlLinkExtractor(allow = ()), callback = 'parse_item', follow = True))
但抓取结果如下 -
DEBUG:Crawled(200)http://localhost/main_page.html>(referer:None)2011-12-05 09:56:07 + 0530 [test_spider] DEBUG:Crawled(200)http:// localhost/a_page. html>(referer: http://localhost/main_page.html )2011-12-05 09:56:07 + 0530 [test_spider] DEBUG:Crawled(200)http://localhost/a1_page.html>(referer:http ://localhost/a_page.html )2011-12-05 09:56:07 + 0530 [test_spider] DEBUG:Crawled(200)http://localhost/b_page.html>(referer:http:// localhost/a1_page .html)2011-12-05 09:56:07 + 0530 [test_spider] DEBUG:Crawled(200)http://localhost/b1_page.html>(referer:http://localhost/b_page.html)2011-12 -05 09:56:07 …
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