Software Carpentry:
Python slice string | DigitalOcean
Python Tutorial 35 - Reverse String Indexes - YouTube
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What is Substring in Python and How to Create a Substring
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String Features: Indexing, Functions, Methods | LEARN.PARALLAX.COM
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How To Index and Slice Strings in Python? - GeeksforGeeks
Python String Substring | DigitalOcean
A complete Guide of Python String with Examples | Codingeek
python - String index out of range (different in length error) - Stack Overflow
How to Index and Slice String in Python? – Brain Mentors
How to Index and Slice String in Python? – Brain Mentors
How to Slice Strings in Python? - AskPython
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Py Strings
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Python Strings | Python Education | Google Developers
