Question

我尝试使用BeautifulSoup从输入下拉列表中从Web抓取数据

这是价值下降

<selected name="try">
<option value="G1">1</option>
<option value="G2">2</option>
</selected>

我这样尝试

soup = BeautifulSoup(url, 'html.parser')
soup['selected'] = 'G1'
data = soup.findAll("table", {"style": "font-size:14px"})
print(data)

每次提交下拉菜单时，它将使用带有<table>标签的数据

但是它仅在主页上显示<table>，如何从每个下拉列表中获取数据？

Answer 1

尝试使用attribute CSS选择器

soup.select('option[value]')

[]是一个属性选择器。这将查找具有option属性的value标签元素。如果可以使用父类/ id，则在页面上有更多下拉菜单时会很有用。

items = soup.select('option[value]')
values = [item.get('value') for item in items]
textValues = [item.text for item in items]

使用父项name属性将下拉列表限制为一个（希望-您需要测试并查看是否需要进一步的操作才能充分限制）。与descendant combinator一起使用：

items = soup.select('[name=try] option[value]')

Answer 2

您仍然继续使用class ChatViewController: UIViewController, UITextFieldDelegate, UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout, PCRoomDelegate { var navbarView: UIView! var navbarAvatar: UIImageView! var navbar: UILabel! var status: String? { didSet { self.updateNavText() } var username: String? { didSet { self.updateNavText() } var displayName: String? didSet { self.updateNavText() } var statusText: NSAttributedString { let text = NSMutableAttributedString(string: displayName ?? "", attributes: [NSAttributedString.Key.font: UIFont.systemFont(ofSize: 16, weight: .bold)]) if let username = self.username { text.append("\n@\(username)") } if let status = self.status { text.append("\n\(status)") } return text } override func viewDidLoad() { super.viewDidLoad() self.navbarView = UIView(frame: CGRect(x: 0.0, y: 0.0, width: UIScreen.main.bounds.width / 1.4, height: 44.0)) self.navbarView.backgroundColor = UIColor.clear self.navbar = UILabel(frame: CGRect(x: 44.0, y: 0.0, width: UIScreen.main.bounds.width / 1.4 - 44, height: 44.0)) self.navbar.backgroundColor = UIColor.clear self.navbar.numberOfLines = 2 self.navbar.textAlignment = NSTextAlignment.left let bodyText = NSMutableAttributedString(string: "Halil İbrahim YÜCE", attributes: [NSAttributedString.Key.font: UIFont.systemFont(ofSize: 16, weight: .bold)]) self.updateNavText() self.navbarView.addSubview(navbar) self.navigationItem.titleView = self.navbarView } func onPresenceChanged( stateChange: PCPresenceStateChange, user: PCUser ) { print("User \(user.displayName)'s presence changed to \(stateChange.current.rawValue)") DispatchQueue.main.async { self.status = stateChange.current.rawValue } } func updateNavText() { self.navbar.attributedText = self.statusText }和findAll()来完成工作。

find()

从下拉选项值中刮取Python BeautifulSoup

2 个答案: