add 1_numpy_matplotlib_scipy_sympy/2.1.text.

1_numpy_matplotlib_scipy_sympy/2.1.text

@@ -0,0 +1,4 @@
+import numpy as np
+Z = np.array([[10, 34, 54, 23],[31, 87, 53, 68],[98, 49, 25, 11],[84, 32, 67, 88]])
+Z = np.pad(Z, pad_width=1, mode='constant', constant_values=0)
+print(Z)