Codex CLI materials.

codex-cli/README.md

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+# How to Add Features to a Python Project With Codex CLI
+
+This is a companion project to the ["How to Add Features to a Python Project With Codex CLI](https://realpython.com/codex-cli) tutorial on Real Python.
+Take a look at the tutorial to see how to finish this project using Codex CLI.

codex-cli/rpcontacts/.gitignore

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+__pycache__

codex-cli/rpcontacts/README.md

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+# RP Contacts
+
+RP Contacts is a contact book application built with Python and Textual.
+
+## Run the Project
+
+Using uv:
+
+```sh
+(venv) $ uv run rpcontacts
+```
+
+## About the Author
+
+Real Python - Email: office@realpython.com
+
+## License
+
+Distributed under the MIT license. See `LICENSE` for more information.

codex-cli/rpcontacts/pyproject.toml

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+[project]
+name = "rpcontacts"
+version = "0.1.0"
+description = "RP Contacts is a contact book application built with Python and Textual."
+readme = "README.md"
+authors = [
+    { name = "Real Python", email = "office@realpython.com" }
+]
+requires-python = ">=3.14"
+dependencies = [
+    "textual==8.0.0",
+]
+
+[project.scripts]
+rpcontacts = "rpcontacts.__main__:main"
+
+[build-system]
+requires = ["uv_build>=0.10.6,<0.11.0"]
+build-backend = "uv_build"

codex-cli/rpcontacts/src/rpcontacts/__init__.py

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+__version__ = "0.1.0"

codex-cli/rpcontacts/src/rpcontacts/__main__.py

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+from rpcontacts.database import Database
+from rpcontacts.tui import ContactsApp
+
+
+def main():
+    app = ContactsApp(db=Database())
+    app.run()
+
+
+if __name__ == "__main__":
+    main()

codex-cli/rpcontacts/src/rpcontacts/database.py

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+import pathlib
+import sqlite3
+
+DATABASE_PATH = pathlib.Path().home() / "contacts.db"
+
+
+class Database:
+    def __init__(self, db_path=DATABASE_PATH):
+        self.db = sqlite3.connect(db_path)
+        self.cursor = self.db.cursor()
+        self._create_table()
+
+    def _create_table(self):
+        query = """
+            CREATE TABLE IF NOT EXISTS contacts(
+                id INTEGER PRIMARY KEY,
+                name TEXT,
+                phone TEXT,
+                email TEXT
+            );
+        """
+        self._run_query(query)
+
+    def _run_query(self, query, *query_args):
+        result = self.cursor.execute(query, [*query_args])
+        self.db.commit()
+        return result
+
+    def get_all_contacts(self):
+        result = self._run_query("SELECT * FROM contacts;")
+        return result.fetchall()
+
+    def get_last_contact(self):
+        result = self._run_query(
+            "SELECT * FROM contacts ORDER BY id DESC LIMIT 1;"
+        )
+        return result.fetchone()
+
+    def add_contact(self, contact):
+        self._run_query(
+            "INSERT INTO contacts VALUES (NULL, ?, ?, ?);",
+            *contact,
+        )
+
+    def delete_contact(self, id):
+        self._run_query(
+            "DELETE FROM contacts WHERE id=(?);",
+            id,
+        )
+
+    def clear_all_contacts(self):
+        self._run_query("DELETE FROM contacts;")

codex-cli/rpcontacts/src/rpcontacts/rpcontacts.tcss

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+QuestionDialog {
+    align: center middle;
+}
+
+#question-dialog {
+    grid-size: 2;
+    grid-gutter: 1 2;
+    grid-rows: 1fr 3;
+    padding: 0 1;
+    width: 60;
+    height: 11;
+    border: solid red;
+    background: $surface;
+}
+
+#question {
+    column-span: 2;
+    height: 1fr;
+    width: 1fr;
+    content-align: center middle;
+}
+
+Button {
+    width: 100%;
+}
+
+.contacts-list {
+    width: 3fr;
+    padding: 0 1;
+    border: solid green;
+}
+
+.buttons-panel {
+    align: center top;
+    padding: 0 1;
+    width: auto;
+    border: solid red;
+}
+
+.separator {
+    height: 1fr;
+}
+
+InputDialog {
+    align: center middle;
+}
+
+#title {
+    column-span: 3;
+    height: 1fr;
+    width: 1fr;
+    content-align: center middle;
+    color: green;
+    text-style: bold;
+}
+
+#input-dialog {
+    grid-size: 3 5;
+    grid-gutter: 1 1;
+    padding: 0 1;
+    width: 50;
+    height: 20;
+    border: solid green;
+    background: $surface;
+}
+
+.label {
+    height: 1fr;
+    width: 1fr;
+    content-align: right middle;
+}
+
+.input {
+    column-span: 2;
+}

codex-cli/rpcontacts/src/rpcontacts/tui.py

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+from textual.app import App, on
+from textual.containers import Grid, Horizontal, Vertical
+from textual.screen import Screen
+from textual.widgets import (
+    Button,
+    DataTable,
+    Footer,
+    Header,
+    Input,
+    Label,
+    Static,
+)
+
+
+class ContactsApp(App):
+    CSS_PATH = "rpcontacts.tcss"
+    BINDINGS = [
+        ("m", "toggle_dark", "Toggle dark mode"),
+        ("a", "add", "Add"),
+        ("d", "delete", "Delete"),
+        ("c", "clear_all", "Clear All"),
+        ("q", "request_quit", "Quit"),
+    ]
+
+    def __init__(self, db):
+        super().__init__()
+        self.db = db
+
+    def compose(self):
+        yield Header()
+        contacts_list = DataTable(classes="contacts-list")
+        contacts_list.focus()
+        contacts_list.add_columns("Name", "Phone", "Email")
+        contacts_list.cursor_type = "row"
+        contacts_list.zebra_stripes = True
+        add_button = Button("Add", variant="success", id="add")
+        add_button.focus()
+        buttons_panel = Vertical(
+            add_button,
+            Button("Delete", variant="warning", id="delete"),
+            Static(classes="separator"),
+            Button("Clear All", variant="error", id="clear"),
+            classes="buttons-panel",
+        )
+        yield Horizontal(contacts_list, buttons_panel)
+        yield Footer()
+
+    def on_mount(self):
+        self.title = "RP Contacts"
+        self.sub_title = "A Contacts Book App With Textual & Python"
+        self._load_contacts()
+
+    def _load_contacts(self):
+        contacts_list = self.query_one(DataTable)
+        for contact_data in self.db.get_all_contacts():
+            id, *contact = contact_data
+            contacts_list.add_row(*contact, key=id)
+
+    def action_toggle_dark(self):
+        self.dark = not self.dark
+
+    def action_request_quit(self):
+        def check_answer(accepted):
+            if accepted:
+                self.exit()
+
+        self.push_screen(QuestionDialog("Do you want to quit?"), check_answer)
+
+    @on(Button.Pressed, "#add")
+    def action_add(self):
+        def check_contact(contact_data):
+            if contact_data:
+                self.db.add_contact(contact_data)
+                id, *contact = self.db.get_last_contact()
+                self.query_one(DataTable).add_row(*contact, key=id)
+
+        self.push_screen(InputDialog(), check_contact)
+
+
+class QuestionDialog(Screen):
+    def __init__(self, message, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.message = message
+
+    def compose(self):
+        no_button = Button("No", variant="primary", id="no")
+        no_button.focus()
+
+        yield Grid(
+            Label(self.message, id="question"),
+            Button("Yes", variant="error", id="yes"),
+            no_button,
+            id="question-dialog",
+        )
+
+    def on_button_pressed(self, event):
+        if event.button.id == "yes":
+            self.dismiss(True)
+        else:
+            self.dismiss(False)
+
+
+class InputDialog(Screen):
+    def compose(self):
+        yield Grid(
+            Label("Add Contact", id="title"),
+            Label("Name:", classes="label"),
+            Input(placeholder="Contact Name", classes="input", id="name"),
+            Label("Phone:", classes="label"),
+            Input(placeholder="Contact Phone", classes="input", id="phone"),
+            Label("Email:", classes="label"),
+            Input(placeholder="Contact Email", classes="input", id="email"),
+            Static(),
+            Button("Cancel", variant="warning", id="cancel"),
+            Button("Ok", variant="success", id="ok"),
+            id="input-dialog",
+        )
+
+    def on_button_pressed(self, event):
+        if event.button.id == "ok":
+            name = self.query_one("#name", Input).value
+            phone = self.query_one("#phone", Input).value
+            email = self.query_one("#email", Input).value
+            self.dismiss((name, phone, email))
+        else:
+            self.dismiss(())