How to click on a button with Selenium?

问题

I am trying to use the Python Selenium API in order to click on a button. The HTML code is as follows:

<button class="btn wizard-next btn-primary" type="button">Weiter</button>

How to best identify this element? I was trying the following code

driver.find_element_by_class_name("btn wizard-next btn-primary").click()

but got an error

selenium.common.exceptions.InvalidSelectorException: Message: invalid selector: Compound class names not permitted

What else can I do to select this element?

回答1:

You cannot use find_element_by_class_name() if class name value contains spaces. Try:

driver.find_element_by_xpath("//button[@class='btn wizard-next btn-primary']").click()

回答2:

You can use css selector also

driver.find_element_by_css_selector("btn").click()

来源：https://stackoverflow.com/questions/38220902/how-to-click-on-a-button-with-selenium