QFileDialog,QLabelclassFileSelector(QWidget):def__init__(self):super().__init__()self.initUI()definitUI(self):self.setWindowTitle('文件选择器')self.layout=QVBoxLayout()self.label=QLabel('选择的文件将显示在这里')self.layout.addWidget(self.label)self.btn=QPushButton('选择文件夹并选中文件...
BASE_DIR = os.path.dirname(os.path.abspath(__file__)) class selectFtpServer(object): def __init__(self): self.dic = {} self.hasReceived = 0 self.sel = selectors.DefaultSelector() self.create_socket() self.handler() def create_socket(self): server = socket.socket(socket.AF_INET...
[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-d3PXnzb5-1605862399160)(https://file.awen.me/blog/image-20201115074546436.png)]例如:await page.querySelector() # 选择器方式定位元素await page.xpath() # xpath 方式定位元素 8.Page.waitForpage.waitFor(selectorOrFunctionOrTimeo...
Python的select()方法直接调用操作系统的IO接口,它监控sockets,open files, and pipes(所有带fileno()方法的文件句柄)何时变成readable 和writeable, 或者通信错误,select()使得同时监控多个连接变的简单,并且这比写一个长循环来等待和监控多客户端连接要高效,因为select直接通过操作系统提供的C的网络接口进行操作,而不...
chain.from_iterable(["hello","python"]): print(i,end=" ") print() # 输出 :h e l l o p y t h o n # 筛选序列 : # 1.compress(data,selector) """ data:一个可以用来迭代的数据。 selector:选择器,用来对data进行筛选。 生成一个筛选之后的迭代器,筛选规则为...
selector import Selector from GZProject.items import * class GZSpider(scrapy.Spider): name = "gznw" # 贵州农产品爬虫 # allowed_domains = ["http://www.gznw.com/eportal/ui?pageId=595091"] start_urls = [ "http://www.gznw.com/eportal/ui?pageId=595091" ] def parse(self, response...
BeautifulSoup还可以轻松使用CSS selectors。如果开发人员知道CSS selector，则无需学习find()或find_all()...
sel=parsel.Selector(html)# 数据清除 清除空白字符串 # 列表推导式 contents1=[content.strip()forcontentincontents]#print(contents1)# 把列表编程字符串 text='\n'.join(contents1)#print(text)returntitle,text defsave_text(title,text):# 保存小说内容 # open 操作文件(写入、读取) file=open(title+...
(can only contain alphanumeric characters and `-`)" }, "python_version": { "label": "Python version", "description": "The version of Python to run the site on" }, "use_azure" : { "label": "Use Azure", "description": "Include Azure deployment files", "selector": "yesno", "...
# Proceed loading the file chosen by the user pathname = fileDialog.GetPath() try: with open(pathname, 'r') as file: self.doLoadDataOrWhatever(file) except IOError: wx.LogError("Cannot open file '%s'." % newfile) 1. 2. 3. ...