text: '''
  字符串常用操作
  '''
  
  import pyperclip
  
  # 转义字符
  print('My brother\'s name is \'007\'')
  # 原始字符串
  print(r'My brother\' name is \'007\'')
  
  str = 'hello123world'
  print('he' in str)
  print('her' in str)
  # 字符串是否只包含字母
  print(str.isalpha())
  # 字符串是否只包含字母和数字
  print(str.isalnum())
  # 字符串是否只包含数字
  print(str.isdecimal())
  
  print(str[0:5].isalpha())
  print(str[5:8].isdecimal())
  
  list = ['床前明月光', '疑是地上霜', '举头望明月', '低头思故乡']
  print('-'.join(list))
  sentence = 'you go your way I will go mine'
  words_list = sentence.split()
  print(words_list)
  email = 'jackfrued@126.com'
  print(email)
  print(email.strip())
  print(email.lstrip())
  
  # 将文本放入系统剪切板中
  pyperclip.copy('老虎不发猫你当我病危呀')
  # 从系统剪切板获得文本
  # print(pyperclip.paster())