can only concatenate list (not "int") to list? - Printable Version +- Python Forum (https://python-forum.io) +-- Forum: Python Coding (https://python-forum.io/forum-7.html) +--- Forum: General Coding Help (https://python-forum.io/forum-8.html) +--- Thread: can only concatenate list (not "int") to list? (/thread-1621.html) |
can only concatenate list (not "int") to list? - landlord1984 - Jan-17-2017 I can do: [1, 2, 3] + [4, 5, 6] But I cannot do: nums=[1, 2, 3] nums[1:]+nums[0]TypeError: can only concatenate list (not "int") to list Why? RE: can only concatenate list (not "int") to list? - Larz60+ - Jan-17-2017 see: http://c4m.cdf.toronto.edu/cohort1/winterphase/level3/ListsStringsLoopsFunctions.html Specifically In [4]: not with a slice, but same thing. essentially nums[0] is considered an int, not a list concatenate must be list + list, not list + int so the following works: n = [1,2,3,4,5] n1 = n[3:]+n[4:] print(n1) RE: can only concatenate list (not "int") to list? - landlord1984 - Jan-17-2017 (Jan-17-2017, 05:38 AM)Larz60+ Wrote: n = [1,2,3,4,5] Thanks. I tried out a better way:nums[1:]+[nums[0]] |