in actually as long as your app didn’t have many data, you don’t have to learn SQL or Databases Languages , you can work with Django without any knowledge of it.
Read moreDo I need to learn html and css before Django?
No it is not necessary to know html/css, if you are learning Django/Flask . But it depends on which kind of team you are working. If have a large number of people working in your team, you can give the work related to html/css to a specific person specialized in html/css.
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