如何使用Python Flask启用复选框，而不会引起400错误的请求错误？

Question

I've got a form which is submitting a post request to Flask. It all works perfectly except when a checkbox is not ticked which causes a 400 error unless I have a try: except: catch for each option.

The challenge is that I have a lot of checkboxes and it seems like there would be a better way than just having a dozen try: except: checks.

Is there a more Pythonic way of doing this please?

Currently the HTML looks like this:

<div class="control">
  <label class="checkbox">
    <input name="option_1" type="checkbox">
     Option 1
    </label>
</div>

My Python code looks like:

try:
    print(request.form['option_1'])

except:
    print("option_1 not selected")

Answer 1

如果某个键可能不存在，请使用.get(...)而不是直接访问它，例如：

print(request.form.get('option_1'))

Answer 2

Thanks to Janos for the explanation, whoop only prints if the box is ticked with no error if it's not there.

if request.form.get('option_1'):
        print('whoop')