views.py

class PasteForm(Form):
    paste = TextAreaField("Paste assets here", [validators.required()])
    evepaste = BooleanField("evepaste")
    submit = SubmitField("Submit")

@app.route('/pscan', methods=['GET', 'POST'])
def pscan():
    form = PasteForm(request.form)
    if request.method == 'POST' and form.validate():
        paste_input = form.data.get('paste', None)
        if paste_input:
            items = None
            try:
                if form.data.get('evepaste', None):
                    print 'Using evepaste'
                    items = evepaste.parse(paste_input)
                else:
                    print 'Using parse_assets'
                    items = parse_assets(paste_input)
                    items['evepaste'] = False
            except evepaste.exceptions.Unparsable, e:
                flash("Unparseable input", "danger")
                return redirect(url_for("pscan"))
            if items:
                return jsonify(result=items)

    return render_template('pscan.html', form=form)