old_contents: from wtforms.fields.html5 import URLField
  from wtforms.validators import url
  
  from flask_wtf import Form
  
  class SubmissionForm(Form):
      pypi_url = URLField(validators=[url()])
new_contents: from wtforms.fields.html5 import URLField
  from wtforms.validators import url, DataRequired
  from wtforms.fields import SelectField
  
  from flask_wtf import Form
  
  class SubmissionForm(Form):
      pypi_url = URLField('PyPi URL', validators=[url(), DataRequired()])
      github_url = URLField('GitHub URL', validators=[url()])
      category = SelectField('Category')
      docs_url = URLField('Documentation URL', validators=[url()])
      issues_url = URLField('Issues URL', validators=[url()])
subject: Create submission form.