You can concatenate variables using the + operator (combine two or more strings) in Python. The + operator should appear between the two variables you want to merge.
Python concatenate variables
Simple example code.
a = 'lemon'
b = 'lime'
soda = a + b
print("concatenate variables", soda)
Output:

Concatenate strings and variables in Python
my_list = ['a', 'b', 'c', 'd']
my_string = ','.join(my_list)
print(my_string)
Output: a,b,c,d
Do comment if you have any doubts or suggestions on this Python concatenate topic.
Note: IDE: PyCharm 2021.3.3 (Community Edition)
Windows 10
Python 3.10.1
All Python Examples are in Python 3, so Maybe its different from python 2 or upgraded versions.