Revert "Delete .venv directory"

This reverts commit 5a2693bd9f.

.venv/lib/python3.9/site-packages/matplotlib/backends/backend_tkagg.py

@@ -0,0 +1,19 @@
+from . import _backend_tk
+from .backend_agg import FigureCanvasAgg
+from ._backend_tk import (
+    _BackendTk, FigureCanvasTk, FigureManagerTk, NavigationToolbar2Tk)
+
+
+class FigureCanvasTkAgg(FigureCanvasAgg, FigureCanvasTk):
+    def draw(self):
+        super().draw()
+        self.blit()
+
+    def blit(self, bbox=None):
+        _backend_tk.blit(self._tkphoto, self.renderer.buffer_rgba(),
+                         (0, 1, 2, 3), bbox=bbox)
+
+
+@_BackendTk.export
+class _BackendTkAgg(_BackendTk):
+    FigureCanvas = FigureCanvasTkAgg