Python-multiple methods of string connection and python-multiple methods

Python-multiple methods of string connection and python-multiple methods

There are many string Connection Methods in python. I am writing code today. By the way, I would like to sum up the following:

The most primitive string connection method: str1 + str2
New python string connection Syntax: str1, str2
Strange string method: str1 str2
% Connection string: 'name: % s; sex: % s' % ('Tom ', 'male ')
String list connection: str. join (some_list)

First, as long as you have programming experience, we all know that you can directly use "+" to connect two strings:

>>> Print ('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 the strings:

>>> Print ('Jim ', 'green ')
Jim greem

The third type is exclusive to python. As long as the two strings are put together, there is blank or no blank in the middle: The two strings are automatically connected to one string:

>>> Print ('Jim ''green ')
Jimgreen

The fourth feature is quite powerful. I have used the printf function in C language for reference. If you have the C language basics, read 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:

>>> Print ('% s, % s' % ('Jim', 'green '))
Jim, green

The fifth type is a skill. 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 = '###'
>>> Print (a. join (var_list ))
Tom ### david ### john

In fact, there is also a string connection method in python, but not many are used, that is, string multiplication, such:

In fact, there is also a string connection method in python, but not many are used, that is, string multiplication, such:

A = 'abc'
>>> Print (a * 3)
Abcabcabc