# keshavadk/weather_app_flask architecture

> Architecture diagram of the GitHub repository keshavadk/weather_app_flask, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-09-27). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/keshavadk/weather_app_flask
- Repository: https://github.com/keshavadk/weather_app_flask

## Overview

This is a small Flask weather app. A visitor opens the city-selection page, submits a city, and receives a result page populated by an OpenWeatherMap lookup. The main domain stages are city selection, weather retrieval, and result presentation; `weather.py` provides the internal API-query layer. The README also describes CSS styling, represented by the stylesheet. Template and stylesheet contents were not sampled, so their detailed wiring is not inferred.

Main entry points: [`main.py`](https://github.com/keshavadk/weather_app_flask/blob/master/main.py) (Flask routes), [`weather.py`](https://github.com/keshavadk/weather_app_flask/blob/master/weather.py) (Weather query), [`templates/weather.html`](https://github.com/keshavadk/weather_app_flask/blob/master/templates/weather.html) (City selection), [`templates/result.html`](https://github.com/keshavadk/weather_app_flask/blob/master/templates/result.html) (Weather result)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_web["Web interface"]
  node_flask_app["Flask routes<br/>[main.py]"]
  node_city_page["City selection<br/>[weather.html]"]
  node_result_page["Weather result<br/>[result.html]"]
  node_stylesheet["Page styling<br/>[style.css]"]
end

subgraph group_lookup["Weather lookup"]
  node_query_api["Weather query<br/>[weather.py]"]
end

node_visitor(("Visitor"))
node_openweathermap["OpenWeatherMap"]

node_visitor -->|"requests pages"| node_flask_app
node_flask_app -->|"renders"| node_city_page
node_flask_app -->|"queries city"| node_query_api
node_query_api -->|"requests weather"| node_openweathermap
node_openweathermap -->|"returns JSON"| node_query_api
node_flask_app -->|"renders result"| node_result_page
node_city_page -->|"shows choices"| node_visitor
node_result_page -->|"shows weather"| node_visitor

click node_flask_app "https://github.com/keshavadk/weather_app_flask/blob/master/main.py"
click node_city_page "https://github.com/keshavadk/weather_app_flask/blob/master/templates/weather.html"
click node_result_page "https://github.com/keshavadk/weather_app_flask/blob/master/templates/result.html"
click node_stylesheet "https://github.com/keshavadk/weather_app_flask/blob/master/static/style.css"
click node_query_api "https://github.com/keshavadk/weather_app_flask/blob/master/weather.py"

classDef toneNeutral fill:#f8fafc,stroke:#334155,stroke-width:1.5px,color:#0f172a
classDef toneBlue fill:#dbeafe,stroke:#2563eb,stroke-width:1.5px,color:#172554
classDef toneAmber fill:#fef3c7,stroke:#d97706,stroke-width:1.5px,color:#78350f
classDef toneMint fill:#dcfce7,stroke:#16a34a,stroke-width:1.5px,color:#14532d
classDef toneRose fill:#ffe4e6,stroke:#e11d48,stroke-width:1.5px,color:#881337
classDef toneIndigo fill:#e0e7ff,stroke:#4f46e5,stroke-width:1.5px,color:#312e81
classDef toneTeal fill:#ccfbf1,stroke:#0f766e,stroke-width:1.5px,color:#134e4a
class node_flask_app,node_city_page,node_result_page,node_stylesheet toneBlue
class node_query_api toneAmber
class node_visitor,node_openweathermap toneIndigo
```

## Components

### Web interface

- [Flask routes](https://github.com/keshavadk/weather_app_flask/blob/master/main.py): `main.py`
- [City selection](https://github.com/keshavadk/weather_app_flask/blob/master/templates/weather.html): `templates/weather.html`
- [Weather result](https://github.com/keshavadk/weather_app_flask/blob/master/templates/result.html): `templates/result.html`
- [Page styling](https://github.com/keshavadk/weather_app_flask/blob/master/static/style.css): `static/style.css`

### Weather lookup

- [Weather query](https://github.com/keshavadk/weather_app_flask/blob/master/weather.py): `weather.py`

### Other components

- **Visitor**
- **OpenWeatherMap**

## Connections

- Visitor → Flask routes: requests pages
- Flask routes → City selection: renders
- Flask routes → Weather query: queries city
- Weather query → OpenWeatherMap: requests weather
- OpenWeatherMap → Weather query: returns JSON
- Flask routes → Weather result: renders result
- City selection → Visitor: shows choices
- Weather result → Visitor: shows weather