Get familiar with hashing file contents in Python

[mwatts15]

In Python there is hashlib (maybe other libraries). Just need to know how to hash files, verify hashes, and how hash collisions can happen

Exit criteria:

• [ ] Know how to hash with one or more algorithms in Python
• [ ] Decide how to hash directories and directory trees vs single files
• [ ] Explain when different files can have the same hash (hash collisions)

[jaideep-seth]

Exit Criteria:

• [X] Know how to hash with one or more algorithms in Python
• hashlib module implemented for python can hash in MD4, MD5, SHA1, SHA2 etc..
• [X] Decide how to hash directories and directory trees vs single files
• file_hash() and folder_hash() methods hash single files and directories respectively and these methods are implemented within Uploading/seed_final.py
• [X] Explain when different files can have the same hash (hash collisions)
• Message Digest algorithms like MD5 and SHA use the contents to create a fixed length hash, unless the contents are identical there can be no hash collisions.