Create overview for Python's enumerate function (#23852)

* Rename guide/english/python/index.md to guide/english/python/enumerate/index.md

* Created More Info section

guide/english/python/enumerate/index.md

@@ -0,0 +1,29 @@
+---
+title: Python's Enumerate Function
+---
+
+## Overview
+`enumerate()` is a built-in function in Python. It is useful for iteration over a list or any other iterable.
+
+## Arguments
+`enumerate()` requires an iterable, and `start` as an optional parameter (it defines where the indexing starts).
+
+## Return Value
+Returns an enumerate object. If you call `list()` on it, you can see that each item in the object is a tuple – an index followed by the item in the iterable.
+
+## Usage Example
+    animals = ['cat', 'dog', 'rabbit', 'fox', 'wolf'] # A list of animals.
+    for index, item in enumerate(animals, start=20):
+      print(index, item)
+### Output
+    20 cat
+    21 dog
+    22 rabbit
+    23 fox
+    24 wolf
+
+<a href='https://repl.it/repls/DarksalmonMajesticDecagons'>Try it out!</a>
+
+#### More Information
+
+- <a href='https://docs.python.org/3/library/functions.html#enumerate'>Python's Docs</a>