# Selenium Basics

## 清空输入框

```python
driver.find_element_by_xxx('xxx').clear()
```

## 等待元素出现

```python
from selenium.webdriver.support.wait import WebDriverWait

b=webdriver.chrome()
......

try:
    element = wait.until(EC.presence_of_element_located((By.XXX, 'value')))
finally:
    b.quit()
```

## 下拉框选择

// To do

## Reference

1. [简书 | python3 selenium 如何清空输入框中的内容](https://www.jianshu.com/p/632eaae1f158)   
2. [python+selenium select下拉选择框定位处理](https://blog.csdn.net/zb455405775/article/details/80689747)


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