C:\Users\name>pip
 
Usage:
  pip <command> [options]
 
Commands:
  install                     Install packages.
  download                    Download packages.
  uninstall                   Uninstall packages.
  freeze                      Output installed packages in requirements format.
  list                        List installed packages.
  show                        Show information about installed packages.
  check                       Verify installed packages have compatible dependencies.
……
 

 
from selenium import webdriver
 
driver = webdriver.Firefox()
 
#訪問百度首頁
first_url= 'http://www.baidu.com'
print("now access %s" %(first_url))
driver.get(first_url)
 
#訪問新聞頁面
second_url='http://news.baidu.com'
print("now access %s" %(second_url))
driver.get(second_url)
 
#返回（後退）到百度首頁
print("back to  %s "
 
%(first_url))
driver.back()
 
#前進到新聞頁
print("forward to  %s"%(second_url))
driver.forward()
 
driver.quit()

info={
'egon':{'pwd':'123','hobbies':['play','music','read']},
'alex':{'pwd':'1234','hobbies':['music','read']},
'wupeiqi':{'pwd':'135','hobbies':['read',]},
}

print(id(info)) #2208947566400
print(id(info['alex']['hobbies'])) #2208949682432
info['alex']['hobbies'].append('play') # 給alex追加play的愛好
print(info)
print(id(info)) #2208947566400
print(id(info['alex']['hobbies'])) #2208949682432