Dec 14, 2010 · If you only have one reference to a string and you concatenate another string to the end, CPython now special cases this and tries to extend the string in place.

Is there an efficient mass string concatenation method in Python (like StringBuilder in C# or StringBuffer in Java)? I found following methods here: Simple concatenation using + Using a …

Nov 23, 2011 · I need to "concatenate to a string in a for loop". To explain, I have this list: list = ['first', 'second', 'other'] And inside a for loop I need to end with this: endstring = …

Oct 15, 2020 · My question on How to Append different strings to a list of strings depending on its position in the list might be of help.

Then I simply add the desired string between the two and voilà, we have inserted a string inside another. Python's slice notation has a great answer explaining the subject of string slicing.

Apr 8, 2012 · I am new and trying to find a way to insert a number of L's at the beginning and end of a string. So if I have a string which says "where did I put my cupcake this morning" And I …

Nov 17, 2013 · I would like to prepend a string to the start of each value in a said column of a pandas dataframe. I am currently using: df.ix[(df['col'] != False), 'col'] = 'str' + df[(df['col'] != …

Sep 17, 2021 · Is there any function in Python that I can use to insert a value in a certain position of a string? Something like this: "3655879ACB6" then in position 4 add "-" to become "3655 …

Apr 15, 2011 · You should also consider string.zfill(), str.rjust() and str.center() for string formatting. These can be chained and have the ' fill ' character specified, thus:

May 14, 2015 · I want to insert some text before a substring in a string. For example: str = "thisissometextthatiwrote" substr = "text" inserttxt = "XX" I want: str = …