#1. keep strings in double quote as one word when split string to words #e.g. str = ‘a b "is si" d ’ #to #['a','b','is si','d'] #use shlex module import shlex words = shlex.split(line)
#2. join string list with delimitor #e.g. li = ['a', 'b','c'] join to A_B_C. '_'.join( [ x.upper() for x in li ] )
#3. list的长度.. len(xxlist)