\b:退格字符,b代表backspace,可以把一个退格符看成一个backspace键 \":双引号,用于在字符串中包含双引号字符。 \':单引号,用于在字符串中包含单引号字符。 \\:反斜杠,用于在字符串中包含反斜杠字符本身。python s1 = 'D:\Program Files\nancy\table\back\Python 3.8\pyt
print str.startswith('H')#处理tab键 str2='Hello\t999'print str2.expandtabs()#寻找子序列位置,没有找到返回-1,返回了是1print str.find('a')#寻找子序列的位置,没有找到就报错 print str.index('e')#字符串的格式化输出,也就是占位符 age=20name='wuya'print'name is {0},and age is {1}'....
defpdf2html(input_path):'''将pdf转成html:param input_path::return:''' doc=fitz.open(input_path)html_content=''forpageintqdm(doc):html_content+=page.get_text('html')#print('开始输出html文件')html_path # #html_content+=""html_path="d:/ann/input.html"withopen(html_path,'w',enco...
print('abc*abc'.title()) 1. 3.center()方法 ''' center() 方法: Return a centered string of length width.-->返回长度为宽度的居中字符串。 Padding is done using the specified fill character (default is a space).-->填充是使用指定的填充字符完成的(默认为空格) ''' 1. 2. 3. 4. 5. ...
(no_signals_test, no_steps_test, no_components_test)) print("The train dataset contains {} labels, with the following distribution:\n {}".format(np.shape(train_labels)[0], Counter(train_labels[:]))) print("The test dataset contains {} labels, with the following distribution:\n {}"...
2. Pad String with Spaces Using rjust()The str.rjust() method in Python is used to pad spaces on the left of the string (the string is aligned to the right). This method takes two arguments: the minimum width of the string as a value, and an optional padding character space. ...
fillchar=None): # real signature unknown; restored from __doc__ (删除string字符串末尾的指定字符(默认为空格)) """ S.rjust(width[, fillchar]) -> str Return S right-justified in a string of length width. Padding is done using the specified fill character (default is a space). """ ...
* Zero-fill the file. With this setting, we do this the hard way to * ensure that all the file space has really been allocated. On * platforms that allow "holes" in files, just seeking to the end * doesn't allocate intermediate space. This way, we know that we ...
defrun(self):print(f'hashing{self.infile}') self.hasher.reset()withopen(self.infile,'rb')asfh: self.hasher.addData(fh.read()) hash_string =bytes(self.hasher.result().toHex()).decode('UTF-8') 我们的函数首先通过打印一条消息到控制台并重置QCryptographicHash对象来开始,清除其中可能存在的任何...
页面元素定位 要定位页面元素,需要找到页面的源码。 IE 浏览器中,打开页面后,在页面上点击鼠标右键,会有“查看源代码”的选项,点击后就会进入页面源码页面,在这里就可以找到页面的所有元素 使用Chrome 浏览器打开页面后,在浏览器的地址栏右侧有一个图标,点击这个图标后,会出现许多菜单项,选择更多工具里的开发者工具...