code formatting (black, isort and flake8)

fet2020/finance/forms.py

@@ -61,7 +61,9 @@ class BillCreateForm(forms.ModelForm):
     iban_text = forms.CharField(required=False, label="IBAN", initial="", max_length=34)
     bic_text = forms.CharField(required=False, label="BIC", initial="", max_length=11)
     saving = forms.BooleanField(
-        required=False, label="Bankdaten für die nächsten Rechnungen speichern.", initial=False
+        required=False,
+        label="Bankdaten für die nächsten Rechnungen speichern.",
+        initial=False,
     )
 
     # Resolution
@@ -138,7 +140,9 @@ class BillUpdateForm(forms.ModelForm):
     iban_text = forms.CharField(required=False, label="IBAN", initial="", max_length=34)
     bic_text = forms.CharField(required=False, label="BIC", initial="", max_length=11)
     saving = forms.BooleanField(
-        required=False, label="Bankdaten für die nächsten Rechnungen speichern.", initial=False
+        required=False,
+        label="Bankdaten für die nächsten Rechnungen speichern.",
+        initial=False,
     )
 
     # only digital bill
@@ -401,7 +405,7 @@ class BillAdminForm(forms.ModelForm):
         qs = qs.filter(status=Wiref.Status.OPENED)
 
         # add wiref id if wiref is already transferred.
-        bill = kwargs.get("instance", None)
+        bill = kwargs.get("instance")
         if bill is not None and bill.wiref is not None and bill.wiref.status != Wiref.Status.OPENED:
             qs |= self.fields["wiref"].queryset.filter(wiref_id=bill.wiref.wiref_id)
 
@@ -425,7 +429,7 @@ class ResolutionAdminForm(forms.ModelForm):
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)  # to get the self.fields set
 
-        resolution = kwargs.get("instance", None)
+        resolution = kwargs.get("instance")
         bills = Bill.objects.filter(resolution=resolution)
         total = 0
         for elem in bills:
@@ -475,7 +479,7 @@ class WirefAdminForm(forms.ModelForm):
 
         self.fields["wiref_id"].required = True
 
-        wiref = kwargs.get("instance", None)
+        wiref = kwargs.get("instance")
         total = 0
 
         if wiref is not None:

fet2020/finance/models.py

@@ -121,7 +121,11 @@ class Wiref(models.Model):
 class Bill(models.Model):
     # members can be deleted but never their bills
     bill_creator = models.ForeignKey(
-        Member, on_delete=models.PROTECT, blank=True, null=True, verbose_name="Verantwortliche:r"
+        Member,
+        on_delete=models.PROTECT,
+        blank=True,
+        null=True,
+        verbose_name="Verantwortliche:r",
     )
 
     bankdata = models.ForeignKey(