O(1) insertion, deletion and member-check per operation. If you plan on using this function a lot on the same dataset, perhaps you would be better off with an ordered set: To play it safe, it has to check the object each time. seen.add could have changed between iterations, and the runtime isn't smart enough to rule that out. Why assign seen.add to seen_add instead of just calling seen.add? Python is a dynamic language, and resolving seen.add each iteration is more costly than resolving a local variable. (4) Do a regular expression replace on the file (with dot does not match newline selected) to change ^(:d+.d+.d+.d+)!!(.*)$ to $2$1.How do I remove duplicates from a list, while preserving order?
You may need to alter the part depending on the line endings in your file Run the same replacement several times until it reports no changes have been made. When there are several lines with the same IP address this will remove about half of them. (3) Do a regular expression replace on the file (with dot does not match newline selected) to change ^(:d+.d+.d+.d+)!!(.*)ġ.*$ to $1!!$2. Specifying sort unique may be useful to reduce the number of lines. (1) Do a regular expression replace on the file (with dot does not match newline selected) to change ^(.*)(:d+.d+.d+.d+)$ to $2!!$1.
(0) Choose a character or a short string that does not occur in the input file.
(b) The result will be ordered by IP address or by the random text depending on whether step (5) is used. (a) The "random text" that sorts first for an IP address will be the one that is kept, not the first in the original file. (4) Use a regular expression to put the text back in the right order. (3) Use a regular expression to find and remove duplicate. (2) Use TextFx to sort the file removing duplicates. (1) Use a regular expression to change all lines to put the IP address and fixed text at the front from Random Text Here:188.0.0.0 to :188.0.0.0!!!Random Text Here. In Notepad++ I would try the following multi-step process.
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