N methods of python string connection

There are many string Connection Methods in python. To sum up:
1 original string connection method: str1 + str22 new python string connection Syntax: str1, str23 strange string method: str1 str24 % connection string: 'name: % s; sex: '% ('Tom', 'male') 5 string list connection: str. join (some_list) First, presumably as long as there is a programming experience, it is estimated that we all know that directly using "+" to connect two strings:
'Jim '+ 'green' = 'jimgreen' the second type is special. If the two strings are separated by commas, the two strings will be connected. However, there will be an extra space between strings:
'Jim ', 'green' = 'Jim green' the third type is unique to python. If you put the two strings together, there is a blank or no blank in the middle: the two strings are automatically connected to one string:
'Jim ''green' = 'jimgreen'' 'Jim ''green' = 'jimgreen' the fourth function is quite powerful. It draws on the printf function in C language, if you have the C language basics, you can see the documentation. In this way, use the symbol "%" to connect a string and a group of variables. The special mark in the string will be automatically replaced with the variable in the variable group on the Right:
'% S, % s' % ('Jim', 'green') = 'Jim, green' the fifth is a technique. Use the string function join. This function accepts a list and uses strings to connect each element in the list in sequence:
Var_list = ['Tom ', 'David', 'john']
A = '### 'a. join (var_list) = 'Tom ### david ### john'