Grant Edwards於 2018年12月9日星期日 UTC+8上午12時52分04秒寫道： > On 2018-12-08, Cameron Simpson <c...@cskk.id.au> wrote: > > On 07Dec2018 20:24, Jach Fong <jf...@ms4.hinet.net> wrote: > >>Ian at 2018/12/8 UTC+8 AM11:28:34 wrote: > >>> What is it exactly that you're trying to accomplish with this? Perhaps > >>> there's a better way than using eval. > >> > >>This problem comes from solving a word puzzle, > >> ab + aa + cd == ce > >>Each character will be translate to a digit and evaluate the correctness, > >> 03 + 00 + 15 == 18 > > > > Then you should be evaluating the digits and assembling values from > > them. Not trying to shoehorn a string through something that _might_ > > accept this string and do what you want. In Python 2 it will accept your > > string and not do what you want; at least in Python 3 it doesn't accept > > your string. > > Just to be clear: you do _not_ want to use eval on the string. > > If you're not the one who created the string, it might wipe your hard > drive or empty your bank account. If you _are_ the one who created > the string, then generate the desired result instead. > > -- > Grant
I didn't evaluate the input string directly. It's the translated "digit" string been evaluated, so shouldn't have any danger on using eval(). --Jach -- https://mail.python.org/mailman/listinfo/python-list
