There are two ‘AA’ in ‘AAA’, one starting from 0 and the other starting from 1.
If ‘AA’ starting from 0 is deleted and inserted with ‘BANAN’, ‘AAA’ becomes ‘BANANA ‘. If ‘AA’ starting from 1 is deleted and inserted with ‘PPLE’, ‘AAA’ becomes ‘APPLE’. Depending on which one is chosen, ‘AAA’ can be edited to ‘BANANA’ or ‘APPLE ‘, two different results. I wrote a program which edits a part of a text. If the part to be edited occurs more than once, it presents the positions and asks the user to choose which one to be edited. I tried with different algorithms. Best one so far would be using just find() and collecting the results in a list. > On Apr 25, 2018, at 11:57 PM, Wes Turner <wes.tur...@gmail.com> wrote: > > > >> On Wednesday, April 25, 2018, Steven D'Aprano <st...@pearwood.info> wrote: >> On Wed, Apr 25, 2018 at 11:22:24AM -0700, Julia Kim wrote: >> > Hi, >> > >> > There’s an error with the string method count(). >> > >> > x = ‘AAA’ >> > y = ‘AA’ >> > print(x.count(y)) >> > >> > The output is 1, instead of 2. >> >> Are you proposing that there ought to be a version of count that looks >> for *overlapping* substrings? >> >> When will this be useful? > > "Finding a motif in DNA" > http://rosalind.info/problems/subs/ > > This is possible with re.find, re.finditer, re.findall, regex.findall(, > overlapped=True), sliding window > https://stackoverflow.com/questions/2970520/string-count-with-overlapping-occurrences > > n-grams can be by indices or by value. > count = len(indices) > https://en.wikipedia.org/wiki/N-gram#Examples > > https://en.wikipedia.org/wiki/String_(computer_science)#String_processing_algorithms > > https://en.wikipedia.org/wiki/Sequential_pattern_mining > >> >> >> -- >> Steve >> _______________________________________________ >> Python-ideas mailing list >> Python-ideas@python.org >> https://mail.python.org/mailman/listinfo/python-ideas >> Code of Conduct: http://python.org/psf/codeofconduct/ > _______________________________________________ > Python-ideas mailing list > Python-ideas@python.org > https://mail.python.org/mailman/listinfo/python-ideas > Code of Conduct: http://python.org/psf/codeofconduct/
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