Revised the code according to the PyCharm and PEP8 inspection.

accounting/models.py

@@ -80,8 +80,8 @@ class Transaction(models.Model):
 
     @property
     def is_balanced(self):
-        """Whether the sum of the amounts of the debit records is the same as the sum of the amounts of the credit
-        records. """
+        """Whether the sum of the amounts of the debit records is the
+        same as the sum of the amounts of the credit records. """
         debit_sum = sum([x.amount for x in self.debit_records])
         credit_sum = sum([x.amount for x in self.credit_records])
         return debit_sum == credit_sum
@@ -105,11 +105,14 @@ class Transaction(models.Model):
     def get_absolute_url(self):
         """Returns the URL to view this transaction."""
         if self.is_cash_expense:
-            return reverse("accounting:transaction", args=("expense", self.sn))
+            return reverse(
+                "accounting:transaction", args=("expense", self.sn))
         elif self.is_cash_income:
-            return reverse("accounting:transaction", args=("income", self.sn))
+            return reverse(
+                "accounting:transaction", args=("income", self.sn))
         else:
-            return reverse("accounting:transaction", args=("transfer", self.sn))
+            return reverse(
+                "accounting:transaction", args=("transfer", self.sn))
 
     def __str__(self):
         """Returns the string representation of this accounting
@@ -163,10 +166,11 @@ class Record(models.Model):
     def __str__(self):
         """Returns the string representation of this accounting
         record."""
-        return self.transaction.date.__str__() + " " \
-               + self.subject.title_zhtw.__str__() \
-               + " " + self.summary.__str__() \
-               + " " + self.amount.__str__()
+        return "%s %s %s %s" % (
+            self.transaction.date,
+            self.subject.title_zhtw,
+            self.summary,
+            self.amount)
 
     class Meta:
         db_table = "accounting_records"

accounting/urls.py

@@ -41,7 +41,10 @@ app_name = "accounting"
 urlpatterns = [
     path("", views.home, name="home"),
     path("cash", views.cash_home, name="cash.home"),
-    path("cash/<str:subject_code>/<str:period_spec>", views.CashReportView.as_view(), name="cash"),
-    path("transactions/<txn-type:type>/<int:pk>", views.CashReportView.as_view(), name="transaction"),
-    path("transactions/<txn-type:type>/<int:pk>/edit", views.CashReportView.as_view(), name="transaction.edit"),
+    path("cash/<str:subject_code>/<str:period_spec>",
+         views.CashReportView.as_view(), name="cash"),
+    path("transactions/<txn-type:type>/<int:pk>",
+         views.CashReportView.as_view(), name="transaction"),
+    path("transactions/<txn-type:type>/<int:pk>/edit",
+         views.CashReportView.as_view(), name="transaction.edit"),
 ]

accounting/utils.py

@@ -61,7 +61,7 @@ class Pagination:
 
     DEFAULT_PAGE_SIZE = 10
 
-    def __init__(self, count, page_no, page_size, is_reverse = False):
+    def __init__(self, count, page_no, page_size, is_reverse=False):
         self.page_size = page_size \
             if page_size is not None \
             else self.DEFAULT_PAGE_SIZE

accounting/views.py

@@ -104,7 +104,8 @@ class BaseReportView(generic.ListView):
                 str(UrlBuilder(request.get_full_path())
                     .del_param("page")))
         try:
-            r = super(BaseReportView, self).get(request, *args, **kwargs)
+            r = super(BaseReportView, self) \
+                .get(request, *args, **kwargs)
         except PageNoOutOfRangeError:
             return HttpResponseRedirect(
                 str(UrlBuilder(request.get_full_path())
@@ -143,7 +144,7 @@ FROM accounting_records AS r
         OR s1.code LIKE '21%%'
         OR s1.code LIKE '22%%')
         AND t1.date >= %s
-        AND t1.date <= %s 
+        AND t1.date <= %s
       GROUP BY t1.sn) AS t
     ON r.transaction_sn=t.sn
   LEFT JOIN accounting_subjects AS s ON r.subject_sn = s.sn
@@ -171,7 +172,7 @@ FROM accounting_records AS r
        LEFT JOIN accounting_subjects AS s1
          ON r1.subject_sn = s1.sn
       WHERE t1.date >= %s
-        AND t1.date <= %s 
+        AND t1.date <= %s
         AND s1.code LIKE %s
       GROUP BY t1.sn) AS t
     ON r.transaction_sn=t.sn

mia_core/templatefilters.py

@@ -14,7 +14,6 @@
 #  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
-import locale
 from datetime import date
 
 from django import template