Ah, that is an interesting, Mike, but not an informative answer. My question is where the specific problem came from. Yes, someone used to R and coming to Python might work at adjusting to what is different and how to get things done. I do that all the time as one hobby is learning lots of languages and assessing them against each other.
So care to share your solution in R which I would assume you could do easily? My quick and dirty attempt, of no interest to the python community, using the R form of integer that has a maximum, and the pipe operator that will not be in standard R for another iteration, is this: ## R code using pipes to convert an integer ## to another integer by subtracting 3 ## from each digit and wrapping around from ## 2 to 9 and so on, meaning modulo 10 ## Load libraries to be used library(dplyr) ## define function to return subtraction by N mod 10 rotdown <- function(dig, by=3) (dig -by) %% 10 start <- 123456789L ## Using pipes that send output between operators start %>% as.character %>% strsplit(split="") %>% unlist %>% as.integer %>% rotdown %>% as.character %>% paste(collapse="") %>% as.integer When run: > start %>% + as.character %>% + strsplit(split="") %>% + unlist %>% + as.integer %>% + rotdown %>% + as.character %>% + paste(collapse="") %>% + as.integer [1] 890123456 The above is not meant to be efficient and I could do better if I take more than a few minutes but is straightforward and uses the vectorized approach so no obvious loops are needed. -----Original Message----- From: Python-list <python-list-bounces+avigross=verizon....@python.org> On Behalf Of C W Sent: Sunday, February 21, 2021 9:48 AM To: Chris Angelico <ros...@gmail.com> Cc: Python <python-list@python.org> Subject: Re: Is there a way to subtract 3 from every digit of a number? Hey Avi, I am a long time R user now using Python. So, this is my attempt to master the language. The problem for me is that I often have an idea about how things are done in R, but not sure to what functions are available in Python. I hope that clears up some confusion. Cheer! On Sun, Feb 21, 2021 at 9:44 AM Chris Angelico <ros...@gmail.com> wrote: > On Mon, Feb 22, 2021 at 1:39 AM Avi Gross via Python-list > <python-list@python.org> wrote: > > But you just moved the goalpost by talking about using a data.frame > > as > that > > (and I assume numpy and pandas) are not very basic Python. > > Given that the original post mentioned a pd.Series, I don't know how > far the goalposts actually moved :) > > ChrisA > -- > https://mail.python.org/mailman/listinfo/python-list > -- https://mail.python.org/mailman/listinfo/python-list -- https://mail.python.org/mailman/listinfo/python-list
