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
• 7,320 points
56 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
• 7,710 points

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