diff --git a/Makefile.Python3 b/Makefile.Python3
new file mode 100644
index 0000000..003b6d2
--- /dev/null
+++ b/Makefile.Python3
@@ -0,0 +1,45 @@
+examples: minimal basic modern animation nonblock xkcd quiver bar surface fill_inbetween fill update imshow
+
+CPPFLAGS = -g -O0 -DSF_VISIBILITY -fvisibility=hidden -fno-strict-aliasing -Wall
+
+minimal: examples/minimal.cpp matplotlibcpp.h
+	cd examples && g++ $(CPPFLAGS) -DWITHOUT_NUMPY minimal.cpp -Iext/plot/ $(shell python3-config --includes) $(shell python3-config --ldflags) -lopencv_core -lopencv_imgproc -o minimal -std=c++17
+
+basic: examples/basic.cpp matplotlibcpp.h
+	cd examples && g++ $(CPPFLAGS) basic.cpp -Iext/plot/ $(shell python3-config --includes) $(shell python3-config --ldflags) -lopencv_core -lopencv_imgproc -o basic -std=c++17
+
+modern: examples/modern.cpp matplotlibcpp.h
+	cd examples && g++ $(CPPFLAGS) modern.cpp -Iext/plot/ $(shell python3-config --includes) $(shell python3-config --ldflags) -lopencv_core -lopencv_imgproc -o modern -std=c++17
+
+animation: examples/animation.cpp matplotlibcpp.h
+	cd examples && g++ $(CPPFLAGS) animation.cpp -Iext/plot/ $(shell python3-config --includes) $(shell python3-config --ldflags) -lopencv_core -lopencv_imgproc -o animation -std=c++17
+
+nonblock: examples/nonblock.cpp matplotlibcpp.h
+	cd examples && g++ $(CPPFLAGS) nonblock.cpp -Iext/plot/ $(shell python3-config --includes) $(shell python3-config --ldflags) -lopencv_core -lopencv_imgproc -o nonblock -std=c++17
+
+quiver: examples/quiver.cpp matplotlibcpp.h
+	cd examples && g++ $(CPPFLAGS) quiver.cpp -Iext/plot/ $(shell python3-config --includes) $(shell python3-config --ldflags) -lopencv_core -lopencv_imgproc -o quiver -std=c++17
+
+xkcd: examples/xkcd.cpp matplotlibcpp.h
+	cd examples && g++ $(CPPFLAGS) xkcd.cpp -Iext/plot/ $(shell python3-config --includes) $(shell python3-config --ldflags) -lopencv_core -lopencv_imgproc -o xkcd -std=c++17
+
+bar: examples/bar.cpp matplotlibcpp.h
+	cd examples && g++ $(CPPFLAGS) bar.cpp -Iext/plot/ $(shell python3-config --includes) $(shell python3-config --ldflags) -lopencv_core -lopencv_imgproc -o bar -std=c++17
+
+surface: examples/surface.cpp matplotlibcpp.h
+	cd examples && g++ $(CPPFLAGS) surface.cpp -Iext/plot/ $(shell python3-config --includes) $(shell python3-config --ldflags) -lopencv_core -lopencv_imgproc -o surface -std=c++17
+
+fill_inbetween: examples/fill_inbetween.cpp matplotlibcpp.h
+	cd examples && g++ $(CPPFLAGS) fill_inbetween.cpp -Iext/plot/ $(shell python3-config --includes) $(shell python3-config --ldflags) -lopencv_core -lopencv_imgproc -o fill_inbetween -std=c++17
+
+fill: examples/fill.cpp matplotlibcpp.h
+	cd examples && g++ $(CPPFLAGS) fill.cpp -Iext/plot/ $(shell python3-config --includes) $(shell python3-config --ldflags) -lopencv_core -lopencv_imgproc -o fill -std=c++17
+
+update: examples/update.cpp matplotlibcpp.h
+	cd examples && g++ update.cpp $(CPPFLAGS) -Iext/plot/ $(shell python3-config --includes) $(shell python3-config --ldflags) -lopencv_core -lopencv_imgproc -o update -std=c++1z
+
+imshow: examples/imshow.cpp matplotlibcpp.h
+	cd examples && g++ $(CPPFLAGS) imshow.cpp -Iext/plot/ $(shell python3-config --includes) $(shell python3-config --ldflags) -lopencv_core -lopencv_imgproc -o imshow -std=c++17
+
+clean:
+	rm -f examples/{minimal,basic,modern,animation,nonblock,xkcd,quiver,bar,surface,fill_inbetween,fill,update,imshow}
diff --git a/examples/basic.cpp b/examples/basic.cpp
index 2dc34c7..ac7b827 100644
--- a/examples/basic.cpp
+++ b/examples/basic.cpp
@@ -7,6 +7,7 @@ namespace plt = matplotlibcpp;
 
 int main() 
 {
+    plt::detail::_interpreter::get();
     // Prepare data.
     int n = 5000;
     std::vector<double> x(n), y(n), z(n), w(n,2);
diff --git a/examples/imshow.cpp b/examples/imshow.cpp
index b11661e..578b5f6 100644
--- a/examples/imshow.cpp
+++ b/examples/imshow.cpp
@@ -8,6 +8,7 @@ namespace plt = matplotlibcpp;
 
 int main()
 {
+    plt::detail::_interpreter::get();
     // Prepare data
     int ncols = 500, nrows = 300;
     std::vector<float> z(ncols * nrows);
diff --git a/examples/minimal.cpp b/examples/minimal.cpp
index fbe1e1c..91159c2 100644
--- a/examples/minimal.cpp
+++ b/examples/minimal.cpp
@@ -3,6 +3,7 @@
 namespace plt = matplotlibcpp;
 
 int main() {
+    plt::detail::_interpreter::get();
     plt::plot({1,3,2,4});
     plt::show();
 }
diff --git a/examples/modern.cpp b/examples/modern.cpp
index a8aa0c7..e764d7e 100644
--- a/examples/modern.cpp
+++ b/examples/modern.cpp
@@ -7,6 +7,7 @@ namespace plt = matplotlibcpp;
 
 int main() 
 {
+    plt::detail::_interpreter::get();
 	// plot(y) - the x-coordinates are implicitly set to [0,1,...,n)
 	//plt::plot({1,2,3,4}); 
 	
diff --git a/examples/nonblock.cpp b/examples/nonblock.cpp
index 327d96c..1d2cc59 100644
--- a/examples/nonblock.cpp
+++ b/examples/nonblock.cpp
@@ -10,6 +10,7 @@ using namespace std;
 
 int main()
 {
+    plt::detail::_interpreter::get();
     // Prepare data.
     int n = 5000;
     std::vector<double> x(n), y(n), z(n), w(n,2);
diff --git a/examples/update.cpp b/examples/update.cpp
index 64f4906..4007eb8 100644
--- a/examples/update.cpp
+++ b/examples/update.cpp
@@ -20,6 +20,7 @@ void update_window(const double x, const double y, const double t,
 
 int main()
 {
+    plt::detail::_interpreter::get();
     size_t n = 1000;
     std::vector<double> x, y;
 
diff --git a/matplotlibcpp.h b/matplotlibcpp.h
index 6a428d4..8cdd7d1 100644
--- a/matplotlibcpp.h
+++ b/matplotlibcpp.h
@@ -1701,7 +1701,7 @@ struct plot_impl<std::false_type>
         PyObject* pystring = PyString_FromString(format.c_str());
 
         auto itx = begin(x), ity = begin(y);
-        for(size_t i = 0; i < xs; ++i) {
+        for(auto i = 0; i < xs; ++i) {
             PyList_SetItem(xlist, i, PyFloat_FromDouble(*itx++));
             PyList_SetItem(ylist, i, PyFloat_FromDouble(*ity++));
         }