学习爬虫路还很长，第一阶段花了好多天了，还在底层，虽然不是我专业要学习的语言，和必备的知识，但是我感觉还挺有意思的。加油，这两天把建模和ai也不学了，唉过年了懒了！
加油坚持就是胜利！！！
先是浏览器窗口切换，这都是给浏览器驱动器发送指令，然后让他去干，很酷！！！！
import time
from selenium import webdriver
from selenium.webdriver.common.by import By
url = "https://cdn2.byhy.net/files/selenium/sample3.html"
wd = webdriver.Edge()
wd.implicitly_wait(10)
wd.get(url)
element = wd.find_element(By.CSS_SELECTOR,'a')
print(element.get_attribute('outerHTML'))
element.click()
#存储下来
mainWindow = wd.current_window_handle
time.sleep(5)
for handle in wd.window_handles:
wd.switch_to.window(handle)
print(wd.title)
if '必应' in wd.title:
break
wd.find_element(By.CSS_SELECTOR,'#sb_form_q').send_keys("hahahah")
time.sleep(1)
wd.find_element(By.CSS_SELECTOR,'#search_icon').click()
time.sleep(5)
#返回窗口
wd.switch_to.window(mainWindow)
wd.find_element(By.CSS_SELECTOR,'button').click()
wd.find_element(By.CSS_SELECTOR,'button').click()
time.sleep(5)
wd.quit()
代码部分：
1.time-给浏览器时间，webdriver建立驱动浏览器，By-寻找（选择）
import time
from selenium import webdriver
from selenium.webdriver.common.by import By2.
url = "https://cdn2.byhy.net/files/selenium/sample3.html"
wd = webdriver.Edge()
wd.implicitly_wait(10)建立联系，然后用
wd.implicitly_wait(10)———如果没有返回就等待，最多10s
3.
element = wd.find_element(By.CSS_SELECTOR,'a')
print(element.get_attribute('outerHTML'))
element.click()
找到标签为‘a’，打印‘a’在浏览器的代码是什么，打印的就是什么！！
然后点击（click（））
4.
mainWindow = wd.current_window_handle将现在的储存起来，便于操作完返回
5.
for handle in wd.window_handles:
wd.switch_to.window(handle)
print(wd.title)
if '必应' in wd.title:
break在浏览器的窗口栏找到有‘必应’这两个字的，然后选择
6.搜索‘hahah’
wd.find_element(By.CSS_SELECTOR,'#sb_form_q').send_keys("hahahah")
time.sleep(1)
wd.find_element(By.CSS_SELECTOR,'#search_icon').click()
7.
wd.switch_to.window(mainWindow)
wd.find_element(By.CSS_SELECTOR,'button').click()
wd.find_element(By.CSS_SELECTOR,'button').click()
time.sleep(5)
然后返回最初的窗口
结束！！！
--------- 选择框-----
radio，checkbox，select框的选择
代码：
import time
from selenium.webdriver.support.ui import Select
from selenium import webdriver
from selenium.webdriver.common.by import By
url = "https://cdn2.byhy.net/files/selenium/test2.html"
wd = webdriver.Edge()
wd.implicitly_wait(5)
wd.get(url)
time.sleep(1)
elements = wd.find_element(By.CSS_SELECTOR,'#s_radio input[checked=checked]')
#print(elements.get_attribute("outerHTML"))
#print('您选的是:'+elements.get_attribute('value'))
#选择 ---------------------------radio
wd.find_element(By.CSS_SELECTOR,'#s_radio input[value="小雷老师"]').click()
element = wd.find_element(By.CSS_SELECTOR,'#s_radio input[checked=checked]')
time.sleep(1)
#选择---------------------------checkbox---多选
elements2 = wd.find_elements(By.CSS_SELECTOR,'#s_checkbox input[checked=checked]')
for i in elements2:
i.click()
time.sleep(1)
wd.find_element(By.CSS_SELECTOR,'#s_checkbox input[value="小雷老师"]').click()
wd.find_element(By.CSS_SELECTOR,'#s_checkbox input[value="小凯老师"]').click()
time.sleep(1)
#选择---------------------------select---滑动
select = Select(wd.find_element(By.CSS_SELECTOR,'#ss_single'))
select.select_by_visible_text('小雷老师')
time.sleep(1)
#多选
select2 = Select(wd.find_element(By.CSS_SELECTOR,'#ss_multi'))
#删除所有
select2.deselect_all()
select2.select_by_visible_text('小雷老师')
select2.select_by_visible_text('小凯老师')
time.sleep(1)
wd.quit()看着比较多，但是就是几个重复用。
代码：
1.
elements = wd.find_element(By.CSS_SELECTOR,'#s_radio input[checked=checked]')
#print(elements.get_attribute("outerHTML"))
#print('您选的是:'+elements.get_attribute('value'))
‘’找到你现在目前所选的。
2.radio框
#选择 ---------------------------radio
wd.find_element(By.CSS_SELECTOR,'#s_radio input[value="小雷老师"]').click()
element = wd.find_element(By.CSS_SELECTOR,'#s_radio input[checked=checked]')
time.sleep(1)找到你要选的，然后点击它，
3.多选
#选择---------------------------checkbox---多选
elements2 = wd.find_elements(By.CSS_SELECTOR,'#s_checkbox input[checked=checked]')
for i in elements2:
i.click()
time.sleep(1)
wd.find_element(By.CSS_SELECTOR,'#s_checkbox input[value="小雷老师"]').click()
wd.find_element(By.CSS_SELECTOR,'#s_checkbox input[value="小凯老师"]').click()
time.sleep(1)
找到点击了的，然后在点一次，就是全部清除了。
然后选择
4. select滑动
#选择---------------------------select---滑动
select = Select(wd.find_element(By.CSS_SELECTOR,'#ss_single'))
select.select_by_visible_text('小雷老师')
time.sleep(1)找到对应的，然后用文本搜索：选择
5.
#多选
select2 = Select(wd.find_element(By.CSS_SELECTOR,'#ss_multi'))
#删除所有
select2.deselect_all()
select2.select_by_visible_text('小雷老师')
select2.select_by_visible_text('小凯老师')多选的，就是全部删除，然后用文本选择
学习与白月黑羽up主，爆赞！！！
