bugfix

Author: Christopher Doris

src/utils.jl

@@ -90,7 +90,7 @@ module Utils
         mimes = copy(ALL_MIMES)
         # look for mimes on show methods for this type
         for meth in methods(show, Tuple{IO, MIME, typeof(x)}).ms
-            mimetype = meth.sig.parameters[3]
+            mimetype = _type_ub(meth.sig).parameters[3]
             mimetype isa DataType || continue
             mime = string(mimetype.parameters[1])
             push!(mimes, mime)

test/runtests.jl

@@ -5,6 +5,9 @@ using PythonCall, Test, Dates, Aqua
 Aqua.test_all(PythonCall, unbound_args=false)
 
 @testset "PythonCall.jl" begin
+    @testset "utils" begin
+        include("utils.jl")
+    end
     @testset "abstract" begin
         include("abstract.jl")
     end

test/utils.jl

@@ -0,0 +1,5 @@
+@testset "mimes_for" begin
+    for x in Any[1, "foo", [], 'z']
+        @test PythonCall.Utils.mimes_for(x) isa Vector{String}
+    end
+end