fix deprecation warning in pandas_to_df, add test, mv exports (#5)

* fix deprecation warning in `pandas_to_df`, add test, mv exports

* format

* fix tests

Author: ericphanson

Project.toml

@@ -1,7 +1,7 @@
 name = "CatBoost"
 uuid = "e2e10f9a-a85d-4fa9-b6b2-639a32100a12"
 authors = ["Beacon Biosignals, Inc."]
-version = "0.1.0"
+version = "0.1.1"
 
 [deps]
 Conda = "8f4d0f93-b110-5947-807f-2305c1781a2d"

src/CatBoost.jl

@@ -6,6 +6,20 @@ using DataFrames
 using OrderedCollections
 using Tables
 
+#####
+##### Exports
+#####
+
+export catboost
+
+export CatBoostRegressor, CatBoostClassifier
+export fit!, cv, predict, predict_proba
+export Pool
+export pandas_to_df
+
+# Datasets API.
+export load_dataset
+
 #####
 ##### _init_
 #####
@@ -137,9 +151,8 @@ function pandas_to_df(pandas_df::PyObject)
         ret = c isa PyObject ? PyAny(c) : c
         return ret isa Int ? ret + 1 : ret
     end
-    # Did the creators of PyCall seriously handle the conversion automatically? 
-    # What were they thinking?
-    df = DataFrame(Any[Array(pandas_df[c].values) for c in colnames], map(Symbol, colnames))
+    df = DataFrame(Any[Array(getproperty(pandas_df, c).values) for c in colnames],
+                   map(Symbol, colnames))
     return df
 end
 
@@ -152,18 +165,4 @@ function load_dataset(dataset_name::Symbol)
     return train, test
 end
 
-#####
-##### Exports
-#####
-
-export catboost
-
-export CatBoostRegressor, CatBoostClassifier
-export fit!, cv, predict, predict_proba
-export Pool
-export pandas_to_df
-
-# Datasets API.
-export load_dataset
-
 end # module

test/runtests.jl

@@ -1,11 +1,22 @@
-using Test, CatBoost, Aqua
+using Test, CatBoost, DataFrames, PyCall
+using Aqua
 
 EXAMPLES_DIR = joinpath(@__DIR__, "..", "examples")
 
-for ex in readdir(EXAMPLES_DIR)
-    @testset "$ex" begin
-        # Just check the examples run, for now.
-        include(joinpath(EXAMPLES_DIR, ex))
+@testset "`to_pandas` and `pandas_to_df`" begin
+    df = DataFrame(; floats=0.5:0.5:3.0, ints=1:6)
+    pd = CatBoost.to_pandas(df)
+    @test pd isa PyObject
+    df2 = pandas_to_df(pd)
+    @test df2 == df
+end
+
+@testset "Examples" begin
+    for ex in readdir(EXAMPLES_DIR)
+        @testset "$ex" begin
+            # Just check the examples run, for now.
+            include(joinpath(EXAMPLES_DIR, ex))
+        end
     end
 end