We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Delete base85 algorithm
### Describe your change:
Re #6216

Normally, I'm not in favour of just deleting algorithms, but I would make the argument that this is not an algorithm, rather just a snippet of code that utilises another library.

Per `CONTRIBTUING.md`
> Algorithms in this repo should not be how-to examples for existing Python packages. Instead, they should perform internal calculations or manipulations to convert input values into different output values
This `base85` algorithm has essentially got two lines of code that purely utilise a singular library. The doctests only test an external library

This repository should not contains examples on how to use a certain library, that would be the library documentation here
https://docs.python.org/3/library/base64.html


* [ ] Add an algorithm?
* [ ] Fix a bug or typo in an existing algorithm?
* [ ] Documentation change?
* [x] Delete an algorithm

### Checklist:
* [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md).
* [x] This pull request is all my own work -- I have not plagiarized.
* [x] I know that pull requests will not be merged if they fail the automated tests.
* [x] This PR only changes one algorithm file.  To ease review, please open separate PRs for separate algorithms.
* [x] All new Python files are placed inside an existing directory.
* [x] All filenames are in all lowercase characters with no spaces or dashes.
* [x] All functions and variable names follow Python naming conventions.
* [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html).
* [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing.
* [x] All new algorithms include at least one URL that points to Wikipedia or another similar explanation.
* [x] If this pull request resolves one or more open issues then the description above includes the issue number(s) with a [closing keyword](https://docs.github.com/en/issues/tracking-your-work-with-issues/linking-a-pull-request-to-an-issue): "Fixes #ISSUE-NUMBER".


--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `ciphers/base85.py`
Content:
```
1 import base64
2 
3 
4 def base85_encode(string: str) -> bytes:
5     """
6     >>> base85_encode("")
7     b''
8     >>> base85_encode("12345")
9     b'0etOA2#'
10     >>> base85_encode("base 85")
11     b'@UX=h+?24'
12     """
13     # encoded the input to a bytes-like object and then a85encode that
14     return base64.a85encode(string.encode("utf-8"))
15 
16 
17 def base85_decode(a85encoded: bytes) -> str:
18     """
19     >>> base85_decode(b"")
20     ''
21     >>> base85_decode(b"0etOA2#")
22     '12345'
23     >>> base85_decode(b"@UX=h+?24")
24     'base 85'
25     """
26     # a85decode the input into bytes and decode that into a human readable string
27     return base64.a85decode(a85encoded).decode("utf-8")
28 
29 
30 if __name__ == "__main__":
31     import doctest
32 
33     doctest.testmod()
34
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/ciphers/base85.py b/ciphers/base85.py
--- a/ciphers/base85.py
+++ b/ciphers/base85.py
@@ -1,30 +1,55 @@
-import base64
+"""
+Base85 (Ascii85) encoding and decoding
 
+https://en.wikipedia.org/wiki/Ascii85
+"""
 
-def base85_encode(string: str) -> bytes:
+
+def _base10_to_85(d: int) -> str:
+    return "".join(chr(d % 85 + 33)) + _base10_to_85(d // 85) if d > 0 else ""
+
+
+def _base85_to_10(digits: list) -> int:
+    return sum(char * 85**i for i, char in enumerate(reversed(digits)))
+
+
+def ascii85_encode(data: bytes) -> bytes:
     """
-    >>> base85_encode("")
+    >>> ascii85_encode(b"")
     b''
-    >>> base85_encode("12345")
+    >>> ascii85_encode(b"12345")
     b'0etOA2#'
-    >>> base85_encode("base 85")
+    >>> ascii85_encode(b"base 85")
     b'@UX=h+?24'
     """
-    # encoded the input to a bytes-like object and then a85encode that
-    return base64.a85encode(string.encode("utf-8"))
+    binary_data = "".join(bin(ord(d))[2:].zfill(8) for d in data.decode("utf-8"))
+    null_values = (32 * ((len(binary_data) // 32) + 1) - len(binary_data)) // 8
+    binary_data = binary_data.ljust(32 * ((len(binary_data) // 32) + 1), "0")
+    b85_chunks = [int(_s, 2) for _s in map("".join, zip(*[iter(binary_data)] * 32))]
+    result = "".join(_base10_to_85(chunk)[::-1] for chunk in b85_chunks)
+    return bytes(result[:-null_values] if null_values % 4 != 0 else result, "utf-8")
 
 
-def base85_decode(a85encoded: bytes) -> str:
+def ascii85_decode(data: bytes) -> bytes:
     """
-    >>> base85_decode(b"")
-    ''
-    >>> base85_decode(b"0etOA2#")
-    '12345'
-    >>> base85_decode(b"@UX=h+?24")
-    'base 85'
+    >>> ascii85_decode(b"")
+    b''
+    >>> ascii85_decode(b"0etOA2#")
+    b'12345'
+    >>> ascii85_decode(b"@UX=h+?24")
+    b'base 85'
     """
-    # a85decode the input into bytes and decode that into a human readable string
-    return base64.a85decode(a85encoded).decode("utf-8")
+    null_values = 5 * ((len(data) // 5) + 1) - len(data)
+    binary_data = data.decode("utf-8") + "u" * null_values
+    b85_chunks = map("".join, zip(*[iter(binary_data)] * 5))
+    b85_segments = [[ord(_s) - 33 for _s in chunk] for chunk in b85_chunks]
+    results = [bin(_base85_to_10(chunk))[2::].zfill(32) for chunk in b85_segments]
+    char_chunks = [
+        [chr(int(_s, 2)) for _s in map("".join, zip(*[iter(r)] * 8))] for r in results
+    ]
+    result = "".join("".join(char) for char in char_chunks)
+    offset = int(null_values % 5 == 0)
+    return bytes(result[: offset - null_values], "utf-8")
 
 
 if __name__ == "__main__":

{"golden_diff": "diff --git a/ciphers/base85.py b/ciphers/base85.py\n--- a/ciphers/base85.py\n+++ b/ciphers/base85.py\n@@ -1,30 +1,55 @@\n-import base64\n+\"\"\"\n+Base85 (Ascii85) encoding and decoding\n \n+https://en.wikipedia.org/wiki/Ascii85\n+\"\"\"\n \n-def base85_encode(string: str) -> bytes:\n+\n+def _base10_to_85(d: int) -> str:\n+    return \"\".join(chr(d % 85 + 33)) + _base10_to_85(d // 85) if d > 0 else \"\"\n+\n+\n+def _base85_to_10(digits: list) -> int:\n+    return sum(char * 85**i for i, char in enumerate(reversed(digits)))\n+\n+\n+def ascii85_encode(data: bytes) -> bytes:\n     \"\"\"\n-    >>> base85_encode(\"\")\n+    >>> ascii85_encode(b\"\")\n     b''\n-    >>> base85_encode(\"12345\")\n+    >>> ascii85_encode(b\"12345\")\n     b'0etOA2#'\n-    >>> base85_encode(\"base 85\")\n+    >>> ascii85_encode(b\"base 85\")\n     b'@UX=h+?24'\n     \"\"\"\n-    # encoded the input to a bytes-like object and then a85encode that\n-    return base64.a85encode(string.encode(\"utf-8\"))\n+    binary_data = \"\".join(bin(ord(d))[2:].zfill(8) for d in data.decode(\"utf-8\"))\n+    null_values = (32 * ((len(binary_data) // 32) + 1) - len(binary_data)) // 8\n+    binary_data = binary_data.ljust(32 * ((len(binary_data) // 32) + 1), \"0\")\n+    b85_chunks = [int(_s, 2) for _s in map(\"\".join, zip(*[iter(binary_data)] * 32))]\n+    result = \"\".join(_base10_to_85(chunk)[::-1] for chunk in b85_chunks)\n+    return bytes(result[:-null_values] if null_values % 4 != 0 else result, \"utf-8\")\n \n \n-def base85_decode(a85encoded: bytes) -> str:\n+def ascii85_decode(data: bytes) -> bytes:\n     \"\"\"\n-    >>> base85_decode(b\"\")\n-    ''\n-    >>> base85_decode(b\"0etOA2#\")\n-    '12345'\n-    >>> base85_decode(b\"@UX=h+?24\")\n-    'base 85'\n+    >>> ascii85_decode(b\"\")\n+    b''\n+    >>> ascii85_decode(b\"0etOA2#\")\n+    b'12345'\n+    >>> ascii85_decode(b\"@UX=h+?24\")\n+    b'base 85'\n     \"\"\"\n-    # a85decode the input into bytes and decode that into a human readable string\n-    return base64.a85decode(a85encoded).decode(\"utf-8\")\n+    null_values = 5 * ((len(data) // 5) + 1) - len(data)\n+    binary_data = data.decode(\"utf-8\") + \"u\" * null_values\n+    b85_chunks = map(\"\".join, zip(*[iter(binary_data)] * 5))\n+    b85_segments = [[ord(_s) - 33 for _s in chunk] for chunk in b85_chunks]\n+    results = [bin(_base85_to_10(chunk))[2::].zfill(32) for chunk in b85_segments]\n+    char_chunks = [\n+        [chr(int(_s, 2)) for _s in map(\"\".join, zip(*[iter(r)] * 8))] for r in results\n+    ]\n+    result = \"\".join(\"\".join(char) for char in char_chunks)\n+    offset = int(null_values % 5 == 0)\n+    return bytes(result[: offset - null_values], \"utf-8\")\n \n \n if __name__ == \"__main__\":\n", "issue": "Delete base85 algorithm\n### Describe your change:\r\nRe #6216\r\n\r\nNormally, I'm not in favour of just deleting algorithms, but I would make the argument that this is not an algorithm, rather just a snippet of code that utilises another library.\r\n\r\nPer `CONTRIBTUING.md`\r\n> Algorithms in this repo should not be how-to examples for existing Python packages. Instead, they should perform internal calculations or manipulations to convert input values into different output values\r\nThis `base85` algorithm has essentially got two lines of code that purely utilise a singular library. The doctests only test an external library\r\n\r\nThis repository should not contains examples on how to use a certain library, that would be the library documentation here\r\nhttps://docs.python.org/3/library/base64.html\r\n\r\n\r\n* [ ] Add an algorithm?\r\n* [ ] Fix a bug or typo in an existing algorithm?\r\n* [ ] Documentation change?\r\n* [x] Delete an algorithm\r\n\r\n### Checklist:\r\n* [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md).\r\n* [x] This pull request is all my own work -- I have not plagiarized.\r\n* [x] I know that pull requests will not be merged if they fail the automated tests.\r\n* [x] This PR only changes one algorithm file.  To ease review, please open separate PRs for separate algorithms.\r\n* [x] All new Python files are placed inside an existing directory.\r\n* [x] All filenames are in all lowercase characters with no spaces or dashes.\r\n* [x] All functions and variable names follow Python naming conventions.\r\n* [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html).\r\n* [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing.\r\n* [x] All new algorithms include at least one URL that points to Wikipedia or another similar explanation.\r\n* [x] If this pull request resolves one or more open issues then the description above includes the issue number(s) with a [closing keyword](https://docs.github.com/en/issues/tracking-your-work-with-issues/linking-a-pull-request-to-an-issue): \"Fixes #ISSUE-NUMBER\".\r\n\n", "before_files": [{"content": "import base64\n\n\ndef base85_encode(string: str) -> bytes:\n    \"\"\"\n    >>> base85_encode(\"\")\n    b''\n    >>> base85_encode(\"12345\")\n    b'0etOA2#'\n    >>> base85_encode(\"base 85\")\n    b'@UX=h+?24'\n    \"\"\"\n    # encoded the input to a bytes-like object and then a85encode that\n    return base64.a85encode(string.encode(\"utf-8\"))\n\n\ndef base85_decode(a85encoded: bytes) -> str:\n    \"\"\"\n    >>> base85_decode(b\"\")\n    ''\n    >>> base85_decode(b\"0etOA2#\")\n    '12345'\n    >>> base85_decode(b\"@UX=h+?24\")\n    'base 85'\n    \"\"\"\n    # a85decode the input into bytes and decode that into a human readable string\n    return base64.a85decode(a85encoded).decode(\"utf-8\")\n\n\nif __name__ == \"__main__\":\n    import doctest\n\n    doctest.testmod()\n", "path": "ciphers/base85.py"}], "after_files": [{"content": "\"\"\"\nBase85 (Ascii85) encoding and decoding\n\nhttps://en.wikipedia.org/wiki/Ascii85\n\"\"\"\n\n\ndef _base10_to_85(d: int) -> str:\n    return \"\".join(chr(d % 85 + 33)) + _base10_to_85(d // 85) if d > 0 else \"\"\n\n\ndef _base85_to_10(digits: list) -> int:\n    return sum(char * 85**i for i, char in enumerate(reversed(digits)))\n\n\ndef ascii85_encode(data: bytes) -> bytes:\n    \"\"\"\n    >>> ascii85_encode(b\"\")\n    b''\n    >>> ascii85_encode(b\"12345\")\n    b'0etOA2#'\n    >>> ascii85_encode(b\"base 85\")\n    b'@UX=h+?24'\n    \"\"\"\n    binary_data = \"\".join(bin(ord(d))[2:].zfill(8) for d in data.decode(\"utf-8\"))\n    null_values = (32 * ((len(binary_data) // 32) + 1) - len(binary_data)) // 8\n    binary_data = binary_data.ljust(32 * ((len(binary_data) // 32) + 1), \"0\")\n    b85_chunks = [int(_s, 2) for _s in map(\"\".join, zip(*[iter(binary_data)] * 32))]\n    result = \"\".join(_base10_to_85(chunk)[::-1] for chunk in b85_chunks)\n    return bytes(result[:-null_values] if null_values % 4 != 0 else result, \"utf-8\")\n\n\ndef ascii85_decode(data: bytes) -> bytes:\n    \"\"\"\n    >>> ascii85_decode(b\"\")\n    b''\n    >>> ascii85_decode(b\"0etOA2#\")\n    b'12345'\n    >>> ascii85_decode(b\"@UX=h+?24\")\n    b'base 85'\n    \"\"\"\n    null_values = 5 * ((len(data) // 5) + 1) - len(data)\n    binary_data = data.decode(\"utf-8\") + \"u\" * null_values\n    b85_chunks = map(\"\".join, zip(*[iter(binary_data)] * 5))\n    b85_segments = [[ord(_s) - 33 for _s in chunk] for chunk in b85_chunks]\n    results = [bin(_base85_to_10(chunk))[2::].zfill(32) for chunk in b85_segments]\n    char_chunks = [\n        [chr(int(_s, 2)) for _s in map(\"\".join, zip(*[iter(r)] * 8))] for r in results\n    ]\n    result = \"\".join(\"\".join(char) for char in char_chunks)\n    offset = int(null_values % 5 == 0)\n    return bytes(result[: offset - null_values], \"utf-8\")\n\n\nif __name__ == \"__main__\":\n    import doctest\n\n    doctest.testmod()\n", "path": "ciphers/base85.py"}]}