What is the preferred way to concatenate strings in python??

0 votes

Since Python's string can't be changed, I was wondering how to concatenate a string more efficiently?

I can write like it:

s += stringfromelsewhere

or like this:

s = []
s.append(somestring)

later

s = ''.join(s)

While writing this question, I found a good article talking about the topic.

http://www.skymind.com/~ocrow/python_string/

But it's in Python 2.x., so the question would be did something change in Python 3?

Dec 20, 2018 in Python by ariaholic
• 7,340 points
96 views

1 answer to this question.

0 votes

If the strings you are concatenating are literals, use String literal concatenation

re.compile(
        "[A-Za-z_]"       # letter or underscore
        "[A-Za-z0-9_]*"   # letter, digit or underscore
    )

This is useful if you want to comment on part of a string (as above) or if you want to use raw stringsor triple quotes for part of a literal but not all.

Since this happens at the syntax layer it uses zero concatenation operators.

answered Dec 20, 2018 by charlie_brown
• 7,720 points

Related Questions In Python

0 votes
1 answer
0 votes
1 answer

Is arr.__len__() the preferred way to get the length of an array in Python?

my_list = [1,2,3,4,5,6,7] len(my_list) # 7 The same works for ...READ MORE

answered Oct 8, 2018 in Python by SDeb
• 13,180 points
73 views
0 votes
1 answer

What is the recommended way to randomize a list of strings using Python?

Hi. Nice question. Here is the simplified answer ...READ MORE

answered Jan 18 in Python by Nymeria
• 3,520 points
57 views
+1 vote
1 answer

What is the correct order to learn concepts in Python for machine learning?

Machine Learning is a vast domain. It ...READ MORE

answered Jul 25, 2018 in Python by Anmol
• 3,620 points
72 views
+1 vote
2 answers

how can i count the items in a list?

Syntax :            list. count(value) Code: colors = ['red', 'green', ...READ MORE

answered Jul 6 in Python by Neha
• 330 points

edited Jul 8 by Kalgi 342 views
0 votes
1 answer

What is the process to kill a particular thread in python?

A multiprocessing.Process can p.terminate() In the cases where I want to ...READ MORE

answered Feb 4 in Python by charlie_brown
• 7,720 points
197 views
0 votes
1 answer

Is there a foreach function in python and is there a way to implement it if there isnt any

Every occurence of "foreach" I've seen (PHP, ...READ MORE

answered Aug 31, 2018 in Python by charlie_brown
• 7,720 points
86 views