Create README.md

Signed-off-by: David Rotermund <54365609+davrot@users.noreply.github.com>

numpy/ndenumerate/README.md

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+# ndenumerate
+{:.no_toc}
+
+<nav markdown="1" class="toc-class">
+* TOC
+{:toc}
+</nav>
+
+## Top
+
+Questions to [David Rotermund](mailto:davrot@uni-bremen.de)
+
+
+## [numpy.ndenumerate](https://numpy.org/doc/stable/reference/generated/numpy.ndenumerate.html)
+
+```python
+class numpy.ndenumerate(arr)
+```
+
+> Multidimensional index iterator.
+> 
+> Return an iterator yielding pairs of array coordinates and values.
+
+
+```python
+import numpy as np
+
+a = np.arange(0, 12).reshape((4, 3))
+print(a)
+print()
+
+for index, x in np.ndenumerate(a):
+    print(index, x)
+```
+
+Output:
+
+```python
+[[ 0  1  2]
+ [ 3  4  5]
+ [ 6  7  8]
+ [ 9 10 11]]
+
+(0, 0) 0
+(0, 1) 1
+(0, 2) 2
+(1, 0) 3
+(1, 1) 4
+(1, 2) 5
+(2, 0) 6
+(2, 1) 7
+(2, 2) 8
+(3, 0) 9
+(3, 1) 10
+(3, 2) 11
+```