most simple mpl plot

examples/simple_plot.py

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+#! /usr/bin/env python
+#
+#   a simple matplotlib plot - testing for pipelines
+#
+_version = "3-sep-2023"
+
+import os
+import sys
+
+import numpy as np
+import matplotlib.pyplot as plt
+
+
+if __name__ == "__main__":
+    x = np.arange(0,2,0.1)
+    y = np.sqrt(x)
+
+    plt.figure()
+    plt.plot(x,y, label="test");
+    plt.legend()
+    plt.show()
+    fn = 'simple_plot.png'
+    plt.savefig(fn)