How can I check in Python with flask if checkboxes in HTML are checked?

In am making a webpage in flask on which users can choose between several options. Depending on these options I want to show them their choosen options in the next page. My HTML code:

<input type="checkbox" name="name1">name1<br>
<input type="checkbox" name="name2">name2<br>
<input type="checkbox" name="name3">name3<br>

My python code:

if checkbox 1 is checked:
    do something
if checkbox 2 is checked:
    do something different
if checkbox 3 is checked:
    do another something different

I cannot find how to form these if-statements. I found something with :

.getvalue

, but then I got an error. With radio-buttons I can get it to work. When I name them all the same and give them different values with :

option = request.form['name']

However, this does also nog work with checkboxes, as then he only remembers the last checkbox, but I want them all. Who can help me? Thank you in advance!