Add requirements

.pre-commit-config.yaml

+repos:
+    - repo: https://github.com/pre-commit/pre-commit-hooks
+      rev: v2.3.0
+      hooks:
+          - id: check-yaml
+          - id: check-xml
+          - id: check-ast
+          - id: check-json
+          - id: check-toml
+          - id: debug-statements
+          - id: end-of-file-fixer
+          - id: trailing-whitespace
+          - id: check-merge-conflict
+          - id: detect-private-key
+          - id: no-commit-to-branch
+            args: [--branch, main]
+    - repo: https://github.com/psf/black
+      rev: 19.10b0
+      hooks:
+          - id: black
+            # https://github.com/psf/black/issues/2964#issuecomment-1080974737
+            additional_dependencies: ['click==8.0.4']
+    - repo: https://github.com/pycqa/isort
+      rev: 5.11.5
+      hooks:
+          - id: isort
+            args: ["--profile", "black"]

bussard.py

 import feedparser
+import opyml
 import Psycopg2
 
+
+def read_archive(self, filename):
+    # filename is assumed to be relative to the directory
+    # you're calling this from, or globally qualified
+    # It cannot be a URL or non-local file.
+    with open(filename, "r") as file:
+        contents = file.read(filename)

requirements.txt

+defusedxml==0.7.1
+feedparser==6.0.10
+opyml==0.1.2
+psycopg2==2.9.7
+sgmllib3k==1.0.0