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Add minor example

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Satwik 2019-11-07 17:27:52 +05:30
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@ -3437,6 +3437,16 @@ f()
[]
```
* Slicing an iterable not always creates a new object. For example,
```py
>>> some_str = "wtfpython"
>>> some_list = ['w', 't', 'f', 'p', 'y', 't', 'h', 'o', 'n']
>>> some_list is some_list[:] # False expected because a new object is created.
False
>>> some_str is some_str[:] # True because strings are immutable, so making a new object is of not much use.
True
```
* `int('١٢٣٤٥٦٧٨٩')` returns `123456789` in Python 3. In Python, Decimal characters include digit characters, and all characters that can be used to form decimal-radix numbers, e.g. U+0660, ARABIC-INDIC DIGIT ZERO. Here's an [interesting story](http://chris.improbable.org/2014/8/25/adventures-in-unicode-digits/) related to this behavior of Python.
* You can seperate numeric literals with underscores (for better readablity) from Python 3 onwards.