diff --git a/1year/2trimester/Coding for Data Science - Python language/Python/Examples/small_tree.dot b/1year/2trimester/Coding for Data Science - Python language/Python/Examples/small_tree.dot
deleted file mode 100644
index aeafa8a7c..000000000
--- a/1year/2trimester/Coding for Data Science - Python language/Python/Examples/small_tree.dot	
+++ /dev/null
@@ -1,29 +0,0 @@
-digraph Tree {
-node [shape=box, style="rounded", color="black", fontname=helvetica] ;
-edge [fontname=helvetica] ;
-0 [label="Values <= 22.0\nmse = 713769113.9\nsamples = 19\nvalue = 34681.8"] ;
-1 [label="Values <= 12.0\nmse = 136463835.3\nsamples = 13\nvalue = 12695.9"] ;
-0 -> 1 [labeldistance=2.5, labelangle=45, headlabel="True"] ;
-2 [label="Values <= 6.5\nmse = 12008101.8\nsamples = 9\nvalue = 3756.3"] ;
-1 -> 2 ;
-3 [label="mse = 135479.0\nsamples = 5\nvalue = 724.2"] ;
-2 -> 3 ;
-4 [label="mse = 5493463.8\nsamples = 4\nvalue = 6788.4"] ;
-2 -> 4 ;
-5 [label="Values <= 16.0\nmse = 36997688.2\nsamples = 4\nvalue = 25466.7"] ;
-1 -> 5 ;
-6 [label="mse = 1982704.2\nsamples = 2\nvalue = 18669.3"] ;
-5 -> 6 ;
-7 [label="mse = 2615667.2\nsamples = 2\nvalue = 30564.8"] ;
-5 -> 7 ;
-8 [label="Values <= 26.5\nmse = 9979918.2\nsamples = 6\nvalue = 63432.7"] ;
-0 -> 8 [labeldistance=2.5, labelangle=-45, headlabel="False"] ;
-9 [label="mse = 0.0\nsamples = 1\nvalue = 56249.0"] ;
-8 -> 9 ;
-10 [label="Values <= 31.0\nmse = 705677.6\nsamples = 5\nvalue = 64738.8"] ;
-8 -> 10 ;
-11 [label="mse = 0.0\nsamples = 1\nvalue = 62442.0"] ;
-10 -> 11 ;
-12 [label="mse = 195954.2\nsamples = 4\nvalue = 64968.5"] ;
-10 -> 12 ;
-}
\ No newline at end of file
diff --git a/1year/2trimester/Coding for Data Science - Python language/Python/Examples/tree.dot b/1year/2trimester/Coding for Data Science - Python language/Python/Examples/tree.dot
deleted file mode 100644
index 308f77589..000000000
--- a/1year/2trimester/Coding for Data Science - Python language/Python/Examples/tree.dot	
+++ /dev/null
@@ -1,69 +0,0 @@
-digraph Tree {
-node [shape=box, style="rounded", color="black", fontname=helvetica] ;
-edge [fontname=helvetica] ;
-0 [label="Values <= 21.5\nmse = 687709497.7\nsamples = 19\nvalue = 37901.0"] ;
-1 [label="Values <= 12.5\nmse = 150877331.4\nsamples = 9\nvalue = 13355.1"] ;
-0 -> 1 [labeldistance=2.5, labelangle=45, headlabel="True"] ;
-2 [label="Values <= 6.0\nmse = 19172174.4\nsamples = 5\nvalue = 5346.4"] ;
-1 -> 2 ;
-3 [label="Values <= 2.5\nmse = 18868.2\nsamples = 3\nvalue = 628.8"] ;
-2 -> 3 ;
-4 [label="Values <= 1.0\nmse = 2756.2\nsamples = 2\nvalue = 496.5"] ;
-3 -> 4 ;
-5 [label="mse = 0.0\nsamples = 1\nvalue = 444.0"] ;
-4 -> 5 ;
-6 [label="mse = 0.0\nsamples = 1\nvalue = 549.0"] ;
-4 -> 6 ;
-7 [label="mse = 0.0\nsamples = 1\nvalue = 761.0"] ;
-3 -> 7 ;
-8 [label="Values <= 10.0\nmse = 7211910.2\nsamples = 2\nvalue = 8491.5"] ;
-2 -> 8 ;
-9 [label="mse = 0.0\nsamples = 1\nvalue = 5806.0"] ;
-8 -> 9 ;
-10 [label="mse = 0.0\nsamples = 1\nvalue = 11177.0"] ;
-8 -> 10 ;
-11 [label="Values <= 18.5\nmse = 29448787.8\nsamples = 4\nvalue = 29372.6"] ;
-1 -> 11 ;
-12 [label="Values <= 15.5\nmse = 13819806.2\nsamples = 2\nvalue = 23382.5"] ;
-11 -> 12 ;
-13 [label="mse = 0.0\nsamples = 1\nvalue = 19665.0"] ;
-12 -> 13 ;
-14 [label="mse = 0.0\nsamples = 1\nvalue = 27100.0"] ;
-12 -> 14 ;
-15 [label="mse = 0.0\nsamples = 2\nvalue = 33366.0"] ;
-11 -> 15 ;
-16 [label="Values <= 26.0\nmse = 19542523.0\nsamples = 10\nvalue = 62446.9"] ;
-0 -> 16 [labeldistance=2.5, labelangle=-45, headlabel="False"] ;
-17 [label="Values <= 23.0\nmse = 16172462.2\nsamples = 2\nvalue = 52227.5"] ;
-16 -> 17 ;
-18 [label="mse = 0.0\nsamples = 1\nvalue = 48206.0"] ;
-17 -> 18 ;
-19 [label="mse = 0.0\nsamples = 1\nvalue = 56249.0"] ;
-17 -> 19 ;
-20 [label="Values <= 30.0\nmse = 1522155.8\nsamples = 8\nvalue = 64019.1"] ;
-16 -> 20 ;
-21 [label="Values <= 28.5\nmse = 31672.7\nsamples = 2\nvalue = 62339.2"] ;
-20 -> 21 ;
-22 [label="mse = 0.0\nsamples = 1\nvalue = 62031.0"] ;
-21 -> 22 ;
-23 [label="mse = 0.0\nsamples = 1\nvalue = 62442.0"] ;
-21 -> 23 ;
-24 [label="Values <= 33.5\nmse = 373054.9\nsamples = 6\nvalue = 64765.7"] ;
-20 -> 24 ;
-25 [label="Values <= 32.5\nmse = 7726.7\nsamples = 3\nvalue = 64134.8"] ;
-24 -> 25 ;
-26 [label="mse = 0.0\nsamples = 2\nvalue = 64084.0"] ;
-25 -> 26 ;
-27 [label="mse = 0.0\nsamples = 1\nvalue = 64287.0"] ;
-25 -> 27 ;
-28 [label="Values <= 35.5\nmse = 92117.0\nsamples = 3\nvalue = 65270.4"] ;
-24 -> 28 ;
-29 [label="Values <= 34.5\nmse = 35733.6\nsamples = 2\nvalue = 65053.3"] ;
-28 -> 29 ;
-30 [label="mse = 0.0\nsamples = 1\nvalue = 64786.0"] ;
-29 -> 30 ;
-31 [label="mse = 0.0\nsamples = 1\nvalue = 65187.0"] ;
-29 -> 31 ;
-32 [label="mse = 0.0\nsamples = 1\nvalue = 65596.0"] ;
-28 -> 32 ;
-}
\ No newline at end of file