return render_template('homepage.html',imgName=filenameD)
PYTHON
<img src= {{ name }} alt="something" style="width:500px;height:600px;">
HTML
im trying to change the image on my website based on the data I pass to it with python flask but the image does not show up, im using something called jinja?
The image is not shown because you are referencing a non-existent variable in your template. Change your <img> tag to
<img src="{{ imgName }}" alt="something" style="width:500px;height:600px;">
and make sure that filenameD contains the path to your image and not only its name i.e. it should be something like /static/image.png.
Also, always surround your attribute values with "" to prevent XSS attacks, see Flask's security docs.
Try this:
Python
return render_template('homepage.html',name=filename)
HTML
<img src = "{{url_for('static', filename=name) }}" alt="something" style="width:500px;height:600px;">
Your image must be located inside 'static' folder and named as usually ('myimg.png', etc)
