Владимир Куц

создали модели;
написали к ним тесты;
написали CRUD-контроллеры на каждую модель (принять данные; подключится к БД через ORM; отрендерить json);
написали к ним тесты;
перешли к новому проекту;

class People(models.Model):
    first_name = models.CharField("Имя", max_length=64)
    last_name = models.CharField("Фамилия", max_length=64)

    def __str__(self):
          return '{} {}'.format(self.first_name, self.last_name)


class PeoplePresence(models.Model):
     date = models.DateField()
     people = models.ManyToManyField(People)

     def __str__(self):
          return '{} {}'.format(self.date, self.people.__str__())

>>> from jinja2 import Template
>>> template = Template("""
... <table style="border:2px black solid">
...    <tr>
...      {% for item in my_array %}
...      <td>{{item}}</td>
...      {% endfor %}
...    </tr>
... </table>""")
>>> my_array = range(10)
>>> my_array
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> print(template.render(my_array=my_array))

<table style="border:2px black solid">
   <tr>
     <td>0</td>
     <td>1</td>
     <td>2</td>
     <td>3</td>
     <td>4</td>
     <td>5</td>
     <td>6</td>
     <td>7</td>
     <td>8</td>
     <td>9</td>
   </tr>
</table>
>>>

>>> def return_false1():
...     print('run 1')
...     return False
...
>>> def return_false2():
...     print('run 2')
...     return False
...
>>> def return_false3():
...     print('run 3')
...     return False
...
>>>
>>> if return_false1() and return_false2() and return_false3():
...     print('I newer executed')
...
run 1
>>>

>>> import csv
>>> with open('ex.csv', 'w', newline='') as csvfile:
...    spamwriter = csv.writer(csvfile, delimiter='.', quotechar='', quoting=csv.QUOTE_NONE)
...    spamwriter.writerow(['A', 'B'])
...    spamwriter.writerow(['test', 10])

$ cat ex.csv 
A.B
test.10

>>> l = ['S', 'p', 'j']
>>> for im in l:
...    exec('{}=1'.format(im))
... 
>>> S
1
>>> j
1
>>> S+p+j
3
>>> locals()
{'__builtins__': <module '__builtin__' (built-in)>, 
  'j': 1, 
  'l': ['S', 'p', 'j'], 
  '__package__': None, 
  'p': 1, 
  'S': 1, 
  'im': 'j', 
  '__name__': '__main__', 
  '__doc__': None
}

>>> l = ['S', 'p', 'j']
>>> for im in l:
...    locals()[im] = 1
... 
>>> S+p+j
3