Summary of several ways to connect python strings

The content of this article is to share with you a summary of several methods of string connection in python. Friends in need can refer to it.

There are many string connection methods in python. I am writing code today. By the way To sum up, from the most primitive string connection method to string list connection, everyone can feel that there are many string connection methods in Python. I am writing code today, and I will summarize it by the way:

The most original string connection method: str1 str2

python new string connection syntax: str1, str2

Weird string connection method: str1 str2
% connection string: 'name:%s; sex: ' % ('tom', 'male')
String list connection: str.join(some_list)

The first method, anyone with programming experience probably knows it, just use it directly " " to connect two strings:

'Jim' 'Green' = 'JimGreen'

The second one is special. If the two strings are separated by "comma", then The two strings will be concatenated, but there will be an extra space between the strings:

'Jim', 'Green' = 'Jim Green'

The third one is also python Unique, just put two strings together, with or without spaces in between: the two strings are automatically concatenated into one string:

'Jim''Green' = 'JimGreen'

'Jim' 'Green' = 'JimGreen'

The fourth function is more powerful, drawing on the function of the printf function in C language. If you have a foundation in C language, just read the documentation. This method uses the symbol "%" to connect a string and a group of variables. The special marks in the string will be automatically replaced with the variables in the variable group on the right:

'%s, %s' % ( 'Jim', 'Green') = 'Jim, Green'

The fifth technique is to use the string function join. This function takes a list and then concatenates each element in the list with a string:

var_list = ['tom', 'david', 'john']

a = '

'
a.join(var_list) = 'tom
david

john'

In fact, there is another string connection method in python, but it is not used much, which is string multiplication, such as ：

a = 'abc'

a * 3 = 'abcabcabc'

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