New script to conveter my markdown linter date format in yaml to new style

markdown-filed-converter.py

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+#
+# This script is a conveter helper for Obsiditan linter
+# to converter the orginal date field name
+# from "date created" to "date-created"
+# from "date modified" to "date-modified"
+# because the dataview plugin cannot identify the white space
+#
+# Created on: 2022-07-10
+# Author: Xing@deyisi.com
+
+import os
+import argparse
+
+
+def go_through_docs(work_dir):
+    count = 0
+    for root, dirs, files in os.walk(work_dir):
+        for filename in files:
+            if filename.endswith(".md"):
+                if convert(os.path.join(root, filename)):
+                    count += 1
+                    print(f"{count:3d}: \"{filename}\" is converted")
+
+
+def change(line):
+    if line.startswith("date created:"):
+        return line.replace(
+            "date created",
+            "date-created"
+        )
+        converted = True
+    if line.startswith("date modified:"):
+        return line.replace(
+            "date modified",
+            "date-modified"
+        )
+    if line.startswith("date updated:"):
+        return line.replace(
+            "date updated",
+            "date-updated"
+        )
+
+
+def convert(filename):
+    contents = []
+    converted = False
+    with open(filename, encoding="utf-8") as reader:
+        yaml_entry = False
+        line_no = 0
+        for line in reader.readlines():
+            if line_no == 0:
+                if line == "---\n":
+                    yaml_entry = True
+
+            if yaml_entry:
+                if line == "---\n" and line_no > 0:
+                    yaml_entry = False
+                else:
+                    updated = change(line)
+                    if updated is not None:
+                        line = updated
+                        converted = True
+
+            contents.append(line)
+
+            line_no += 1
+
+        with open(filename, "w", encoding="utf-8") as writer:
+            writer.write("".join(contents))
+        return converted
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(
+        description="Converter existing Markdown documents with"
+        " new linter format.\n"
+        "The linter format `date created` will change to "
+        "`date-created` format.",
+    )
+
+    parser.add_argument(
+        '--dir',
+        help='The location of the source ',
+        default=os.getcwd(),
+    )
+    args = parser.parse_args()
+    work_dir = args.dir
+
+    print(f"Converting `{work_dir}` to new format...")
+
+    if work_dir is None:
+        work_dir = os.getcwd()
+
+    if os.path.isdir(work_dir):
+        go_through_docs(work_dir)
+    else:
+        print(f"Error: no such directory {work_dir} found.")