On Tue, Apr 17, 2012 at 12:14 AM, Paul Moore <p.f.moore at gmail.com> wrote: > On 16 April 2012 17:10, Nam Nguyen <bitsink at gmail.com> wrote: >> PEP 8 suggests no extra spaces after and before square brackets, and >> colons. So code like this is appropriate: >> >> a_list[1:3] >> >> But I find it less readable in the case of: >> >> a_list[pos + 1:-1] >> >> The colon is seemingly lost in the right. >> >> Would it be better to read like below? >> >> a_list[pos + 1 : -1] >> >> Any opinion? > > It says no space *before* a colon, not after. So the following should > be OK (and is what I'd use): > > a_list[pos + 1: -1] I hope that's now what it says about slices -- that was meant for dict displays. For slices it should be symmetrical. In this case I would remove the spaces around the +, but it's okay to add spaces around the : too. It does look odd to have an operator that binds tighter (the +) surrounded by spaces while the operator that binds less tight (:) is not. (And in this context, : should be considered an operator.) -- --Guido van Rossum (python.org/~guido)
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