selenium keys模块

　　 Keys模块解释
    NULL = 'ue000'
    CANCEL = 'ue001'  # ^break
    HELP = 'ue002'
    BACKSPACE = 'ue003'
    BACK_SPACE = BACKSPACE   #删除键
    TAB = 'ue004'   #TAB键
    CLEAR = 'ue005'  
    RETURN = 'ue006'
    ENTER = 'ue007'   #回车键
    SHIFT = 'ue008'   #Shift键
    LEFT_SHIFT = SHIFT
    CONTROL = 'ue009'
    LEFT_CONTROL = CONTROL   #Ctrl 键
    ALT = 'ue00a'           #Alt 键
    LEFT_ALT = ALT
    PAUSE = 'ue00b'
    ESCAPE = 'ue00c'   #ECS键
    SPACE = 'ue00d'    #空格键 
    PAGE_UP = 'ue00e'   #PgUp 键
    PAGE_DOWN = 'ue00f' #PgDwon 键
    END = 'ue010'    #END 键
    HOME = 'ue011'   #HOME 键
    LEFT = 'ue012'  #左键
    ARROW_LEFT = LEFT  
    UP = 'ue013'    #上键
    ARROW_UP = UP   
    RIGHT = 'ue014'
    ARROW_RIGHT = RIGHT  #右键
    DOWN = 'ue015'      #下键
    ARROW_DOWN = DOWN  
    INSERT = 'ue016'    #insert键 
    DELETE = 'ue017'    #del键

    SEMICOLON = 'ue018'  #';'键
    EQUALS = 'ue019'     #'='键
　　#数字键盘
    NUMPAD0 = 'ue01a'  # number pad keys
    NUMPAD1 = 'ue01b'
    NUMPAD2 = 'ue01c'
    NUMPAD3 = 'ue01d'
    NUMPAD4 = 'ue01e'
    NUMPAD5 = 'ue01f'
    NUMPAD6 = 'ue020'
    NUMPAD7 = 'ue021'
    NUMPAD8 = 'ue022'
    NUMPAD9 = 'ue023'
    MULTIPLY = 'ue024' # '*' 键
    ADD = 'ue025'   # '+' 键
    SEPARATOR = 'ue026'  #','键
    SUBTRACT = 'ue027'  # '-' 键
    DECIMAL = 'ue028'   # '.'键
    DIVIDE = 'ue029'    #'/'键

    F1 = 'ue031'  # function  keys
    F2 = 'ue032'
    F3 = 'ue033'
    F4 = 'ue034'
    F5 = 'ue035'
    F6 = 'ue036'
    F7 = 'ue037'
    F8 = 'ue038'
    F9 = 'ue039'
    F10 = 'ue03a'
    F11 = 'ue03b'
    F12 = 'ue03c'

    META = 'ue03d'
    COMMAND = 'ue03d'

操作组合键：

　　　　send_keys(Keys.CONTROL,'a') 　　#全选（Ctrl+A）

　　　　send_keys(Keys.CONTROL,'c') 　　#复制（Ctrl+C）

　　　　send_keys(Keys.CONTROL,'x') 　　#剪切（Ctrl+X）

　　　　send_keys(Keys.CONTROL,'v') 　　#粘贴（Ctrl+V）

              回车键 Keys.ENTER

              删除键 Keys.BACK_SPACE

              空格键 Keys.SPACE

              制表键 Keys.TAB

              回退键 Keys.ESCAPE

              刷新键 Keys.F5