Solution

.flake8

@@ -4,4 +4,4 @@ ignore = E203, E266, W503, ANN002, ANN003, ANN101, ANN102, ANN401, N807, N818
 max-line-length = 79
 max-complexity = 18
 select = B,C,E,F,W,T4,B9,ANN,Q0,N8,VNE
-exclude = venv, tests
+exclude = .venv, tests

app/create_file.py

@@ -1 +1,69 @@
-# write your code here
+import os
+import sys
+from datetime import datetime
+from typing import List, Tuple
+
+
+def parse_arguments(arguments: List[str]) -> Tuple[List[str], str]:
+    directory_parts: List[str] = []
+    file_name: str = ""
+    current_mode: str = ""
+
+    for argument in arguments:
+        if argument == "-d":
+            current_mode = "-d"
+            continue
+        if argument == "-f":
+            current_mode = "-f"
+            continue
+        if current_mode == "-d":
+            directory_parts.append(argument)
+        if current_mode == "-f":
+            file_name = argument
+
+    return directory_parts, file_name
+
+
+def create_directories(directory_parts: List[str]) -> str:
+    if not directory_parts:
+        return ""
+    path: str = os.path.join(*directory_parts)
+    os.makedirs(path, exist_ok=True)
+    return path
+
+
+def read_content() -> List[str]:
+    content_lines: List[str] = []
+    while True:
+        user_input: str = input("Enter content line: ")
+        if user_input == "stop":
+            break
+        content_lines.append(user_input)
+    return content_lines
+
+
+def write_file(file_path: str, content_lines: List[str]) -> None:
+    file_exists: bool = os.path.exists(file_path)
+    timestamp: str = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
+
+    with open(file_path, "a") as target_file:
+        if file_exists:
+            target_file.write("\n")
+        target_file.write(f"{timestamp}\n")
+        for index, line in enumerate(content_lines, start=1):
+            target_file.write(f"{index} {line}\n")
+
+
+def create_file_app() -> None:
+    arguments: List[str] = sys.argv[1:]
+    directory_parts, file_name = parse_arguments(arguments)
+    directory_path: str = create_directories(directory_parts)
+
+    if file_name:
+        file_path: str = os.path.join(directory_path, file_name)\
+            if directory_path else file_name
+        content_lines: List[str] = read_content()
+        write_file(file_path, content_lines)
+
+
+create_file_app()