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python - Where does flask look for image files?

I am setting up a local server using flask. All I want to do currently is display an image using the img tag in the index.html page. But I keep getting error

GET http://localhost:5000/
ayrton_senna_movie_wallpaper_by_bashgfx-d4cm6x6.jpg 404 (NOT FOUND)  

Where does flask look for files? A Little help would be great. My HTML code is

<html>
  <head>

  </head>
  <body>
    <h1>Hi Lionel Messi</h1>

  <img src= "ayrton_senna_movie_wallpaper_by_bashgfx-d4cm6x6.jpg ">

  </body>

</html>

My python code is :

@app.route('/index', methods=['GET', 'POST'])
def lionel(): 
    return app.send_static_file('index.html')
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Is the image file ayrton_senna_movie_wallpaper_by_bashgfx-d4cm6x6.jpg in your static directory? If you move it to your static directory and update your HTML as such:

<img src="/static/ayrton_senna_movie_wallpaper_by_bashgfx-d4cm6x6.jpg">

It should work.

Also, it is worth noting, there is a better way to structure this.

File structure:

app.py
static
   |----ayrton_senna_movie_wallpaper_by_bashgfx-d4cm6x6.jpg
templates
   |----index.html

app.py

from flask import Flask, render_template, url_for
app = Flask(__name__)

@app.route('/index', methods=['GET', 'POST'])
def lionel(): 
    return render_template('index.html')

if __name__ == '__main__':
    app.run()

templates/index.html

<html>
  <head>

  </head>
  <body>
    <h1>Hi Lionel Messi</h1>

  <img src="{{url_for('static', filename='ayrton_senna_movie_wallpaper_by_bashgfx-d4cm6x6.jpg')}}" />

  </body>

</html>

Doing it this way ensures that you are not hard-coding a URL path for your static assets.


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