Question

从字符串/列表创建字典的最有效方法是什么？例如，如果我有一个列表['a', 'b', 'c', 'd']，该如何创建以列表的元素为键，索引为值的字典？以上列表的外观：{'a': 0, 'b': 1, 'c': 2, 'd': 3}

Answer 1

boolean webElement = false; logger.info("Executing waitForElementToBeVisible for page element"); try { logger.info("Waiting for web element " + expectedElement + " with fluent wait"); driver.manage().timeouts().implicitlyWait(0, TimeUnit.SECONDS); Wait<WebDriver> wait = new FluentWait<WebDriver>(driver) .withTimeout(Duration.ofSeconds(45)) .pollingEvery(Duration.ofMillis(200)) .ignoring(org.openqa.selenium.NoSuchElementException.class,org.openqa. selenium.StaleElementReferenceException.class) .ignoring(org.openqa.selenium.ElementNotVisibleException.class); wait.until(ExpectedConditions.visibilityOfElementLocated(expectedElement)); webElement = true; } catch (Exception e) { logger.error(expectedElement + " : Not found the element on Page"); webElement = false; Assert.fail("WebElement is not visible"); } finally { driver.manage().timeouts().implicitlyWait(TestConstant.ImplicitWaitTime, TimeUnit.SECONDS); } return webElement; }将返回元素及其索引，您可以在字典理解中使用它。

enumerate()

Answer 2

您可以使用此：

lista = ['a', 'b', 'c', 'd']
dictionary = {}

n = 0
for el in lista:
    dictionary[el] = n
    n += 1

使用列表索引创建字典

2 个答案: