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File models.py has 833 lines of code (exceeds 500 allowed). Consider refactoring.
Open

import copy
import importlib
import uuid
import warnings
from functools import partial
Severity: Major
Found in simple_history/models.py - About 1 day to fix

    Cyclomatic complexity is too high in method diff_against. (16)
    Open

        def diff_against(self, old_history, excluded_fields=None, included_fields=None):
        if not isinstance(old_history, type(self)):
            raise TypeError(
                ("unsupported type(s) for diffing: " "'{}' and '{}'").format(
                    type(self), type(old_history)
    Severity: Minor
    Found in simple_history/models.py by radon

    Cyclomatic Complexity

    Cyclomatic Complexity corresponds to the number of decisions a block of code contains plus 1. This number (also called McCabe number) is equal to the number of linearly independent paths through the code. This number can be used as a guide when testing conditional logic in blocks.

    Radon analyzes the AST tree of a Python program to compute Cyclomatic Complexity. Statements have the following effects on Cyclomatic Complexity:

    Construct Effect on CC Reasoning
    if +1 An if statement is a single decision.
    elif +1 The elif statement adds another decision.
    else +0 The else statement does not cause a new decision. The decision is at the if.
    for +1 There is a decision at the start of the loop.
    while +1 There is a decision at the while statement.
    except +1 Each except branch adds a new conditional path of execution.
    finally +0 The finally block is unconditionally executed.
    with +1 The with statement roughly corresponds to a try/except block (see PEP 343 for details).
    assert +1 The assert statement internally roughly equals a conditional statement.
    Comprehension +1 A list/set/dict comprehension of generator expression is equivalent to a for loop.
    Boolean Operator +1 Every boolean operator (and, or) adds a decision point.

    Source: http://radon.readthedocs.org/en/latest/intro.html

    Cyclomatic complexity is too high in class HistoricalChanges. (16)
    Open

    class HistoricalChanges:
    def diff_against(self, old_history, excluded_fields=None, included_fields=None):
        if not isinstance(old_history, type(self)):
            raise TypeError(
                ("unsupported type(s) for diffing: " "'{}' and '{}'").format(
    Severity: Minor
    Found in simple_history/models.py by radon

    Cyclomatic Complexity

    Cyclomatic Complexity corresponds to the number of decisions a block of code contains plus 1. This number (also called McCabe number) is equal to the number of linearly independent paths through the code. This number can be used as a guide when testing conditional logic in blocks.

    Radon analyzes the AST tree of a Python program to compute Cyclomatic Complexity. Statements have the following effects on Cyclomatic Complexity:

    Construct Effect on CC Reasoning
    if +1 An if statement is a single decision.
    elif +1 The elif statement adds another decision.
    else +0 The else statement does not cause a new decision. The decision is at the if.
    for +1 There is a decision at the start of the loop.
    while +1 There is a decision at the while statement.
    except +1 Each except branch adds a new conditional path of execution.
    finally +0 The finally block is unconditionally executed.
    with +1 The with statement roughly corresponds to a try/except block (see PEP 343 for details).
    assert +1 The assert statement internally roughly equals a conditional statement.
    Comprehension +1 A list/set/dict comprehension of generator expression is equivalent to a for loop.
    Boolean Operator +1 Every boolean operator (and, or) adds a decision point.

    Source: http://radon.readthedocs.org/en/latest/intro.html

    HistoricalRecords has 27 functions (exceeds 20 allowed). Consider refactoring.
    Open

    class HistoricalRecords:
    DEFAULT_MODEL_NAME_PREFIX = "Historical"

    thread = context = LocalContext()  # retain thread for backwards compatibility
    m2m_models = {}
    Severity: Minor
    Found in simple_history/models.py - About 3 hrs to fix

      Function __init__ has 27 arguments (exceeds 7 allowed). Consider refactoring.
      Open

          def __init__(
      Severity: Major
      Found in simple_history/models.py - About 3 hrs to fix

        Cyclomatic complexity is too high in function bulk_create_with_history. (12)
        Open

        def bulk_create_with_history(
    objs,
    model,
    batch_size=None,
    ignore_conflicts=False,
        Severity: Minor
        Found in simple_history/utils.py by radon

        Cyclomatic Complexity

        Cyclomatic Complexity corresponds to the number of decisions a block of code contains plus 1. This number (also called McCabe number) is equal to the number of linearly independent paths through the code. This number can be used as a guide when testing conditional logic in blocks.

        Radon analyzes the AST tree of a Python program to compute Cyclomatic Complexity. Statements have the following effects on Cyclomatic Complexity:

        Construct Effect on CC Reasoning
        if +1 An if statement is a single decision.
        elif +1 The elif statement adds another decision.
        else +0 The else statement does not cause a new decision. The decision is at the if.
        for +1 There is a decision at the start of the loop.
        while +1 There is a decision at the while statement.
        except +1 Each except branch adds a new conditional path of execution.
        finally +0 The finally block is unconditionally executed.
        with +1 The with statement roughly corresponds to a try/except block (see PEP 343 for details).
        assert +1 The assert statement internally roughly equals a conditional statement.
        Comprehension +1 A list/set/dict comprehension of generator expression is equivalent to a for loop.
        Boolean Operator +1 Every boolean operator (and, or) adds a decision point.

        Source: http://radon.readthedocs.org/en/latest/intro.html

        Cyclomatic complexity is too high in method bulk_history_create. (10)
        Open

            def bulk_history_create(
        self,
        objs,
        batch_size=None,
        update=False,
        Severity: Minor
        Found in simple_history/manager.py by radon

        Cyclomatic Complexity

        Cyclomatic Complexity corresponds to the number of decisions a block of code contains plus 1. This number (also called McCabe number) is equal to the number of linearly independent paths through the code. This number can be used as a guide when testing conditional logic in blocks.

        Radon analyzes the AST tree of a Python program to compute Cyclomatic Complexity. Statements have the following effects on Cyclomatic Complexity:

        Construct Effect on CC Reasoning
        if +1 An if statement is a single decision.
        elif +1 The elif statement adds another decision.
        else +0 The else statement does not cause a new decision. The decision is at the if.
        for +1 There is a decision at the start of the loop.
        while +1 There is a decision at the while statement.
        except +1 Each except branch adds a new conditional path of execution.
        finally +0 The finally block is unconditionally executed.
        with +1 The with statement roughly corresponds to a try/except block (see PEP 343 for details).
        assert +1 The assert statement internally roughly equals a conditional statement.
        Comprehension +1 A list/set/dict comprehension of generator expression is equivalent to a for loop.
        Boolean Operator +1 Every boolean operator (and, or) adds a decision point.

        Source: http://radon.readthedocs.org/en/latest/intro.html

        Cyclomatic complexity is too high in method history_view. (10)
        Open

            def history_view(self, request, object_id, extra_context=None):
        """The 'history' admin view for this model."""
        request.current_app = self.admin_site.name
        model = self.model
        opts = model._meta
        Severity: Minor
        Found in simple_history/admin.py by radon

        Cyclomatic Complexity

        Cyclomatic Complexity corresponds to the number of decisions a block of code contains plus 1. This number (also called McCabe number) is equal to the number of linearly independent paths through the code. This number can be used as a guide when testing conditional logic in blocks.

        Radon analyzes the AST tree of a Python program to compute Cyclomatic Complexity. Statements have the following effects on Cyclomatic Complexity:

        Construct Effect on CC Reasoning
        if +1 An if statement is a single decision.
        elif +1 The elif statement adds another decision.
        else +0 The else statement does not cause a new decision. The decision is at the if.
        for +1 There is a decision at the start of the loop.
        while +1 There is a decision at the while statement.
        except +1 Each except branch adds a new conditional path of execution.
        finally +0 The finally block is unconditionally executed.
        with +1 The with statement roughly corresponds to a try/except block (see PEP 343 for details).
        assert +1 The assert statement internally roughly equals a conditional statement.
        Comprehension +1 A list/set/dict comprehension of generator expression is equivalent to a for loop.
        Boolean Operator +1 Every boolean operator (and, or) adds a decision point.

        Source: http://radon.readthedocs.org/en/latest/intro.html

        Cyclomatic complexity is too high in method copy_fields. (9)
        Open

            def copy_fields(self, model):
        """
        Creates copies of the model's original fields, returning
        a dictionary mapping field name to copied field object.
        """
        Severity: Minor
        Found in simple_history/models.py by radon

        Cyclomatic Complexity

        Cyclomatic Complexity corresponds to the number of decisions a block of code contains plus 1. This number (also called McCabe number) is equal to the number of linearly independent paths through the code. This number can be used as a guide when testing conditional logic in blocks.

        Radon analyzes the AST tree of a Python program to compute Cyclomatic Complexity. Statements have the following effects on Cyclomatic Complexity:

        Construct Effect on CC Reasoning
        if +1 An if statement is a single decision.
        elif +1 The elif statement adds another decision.
        else +0 The else statement does not cause a new decision. The decision is at the if.
        for +1 There is a decision at the start of the loop.
        while +1 There is a decision at the while statement.
        except +1 Each except branch adds a new conditional path of execution.
        finally +0 The finally block is unconditionally executed.
        with +1 The with statement roughly corresponds to a try/except block (see PEP 343 for details).
        assert +1 The assert statement internally roughly equals a conditional statement.
        Comprehension +1 A list/set/dict comprehension of generator expression is equivalent to a for loop.
        Boolean Operator +1 Every boolean operator (and, or) adds a decision point.

        Source: http://radon.readthedocs.org/en/latest/intro.html

        Cyclomatic complexity is too high in method _process. (9)
        Open

            def _process(self, to_process, date_back=None, dry_run=True):
        if date_back:
            stop_date = timezone.now() - timezone.timedelta(minutes=date_back)
        else:
            stop_date = None
        Severity: Minor
        Found in simple_history/management/commands/clean_duplicate_history.py by radon

        Cyclomatic Complexity

        Cyclomatic Complexity corresponds to the number of decisions a block of code contains plus 1. This number (also called McCabe number) is equal to the number of linearly independent paths through the code. This number can be used as a guide when testing conditional logic in blocks.

        Radon analyzes the AST tree of a Python program to compute Cyclomatic Complexity. Statements have the following effects on Cyclomatic Complexity:

        Construct Effect on CC Reasoning
        if +1 An if statement is a single decision.
        elif +1 The elif statement adds another decision.
        else +0 The else statement does not cause a new decision. The decision is at the if.
        for +1 There is a decision at the start of the loop.
        while +1 There is a decision at the while statement.
        except +1 Each except branch adds a new conditional path of execution.
        finally +0 The finally block is unconditionally executed.
        with +1 The with statement roughly corresponds to a try/except block (see PEP 343 for details).
        assert +1 The assert statement internally roughly equals a conditional statement.
        Comprehension +1 A list/set/dict comprehension of generator expression is equivalent to a for loop.
        Boolean Operator +1 Every boolean operator (and, or) adds a decision point.

        Source: http://radon.readthedocs.org/en/latest/intro.html

        Function copy_fields has a Cognitive Complexity of 19 (exceeds 7 allowed). Consider refactoring.
        Open

            def copy_fields(self, model):
        """
        Creates copies of the model's original fields, returning
        a dictionary mapping field name to copied field object.
        """
        Severity: Minor
        Found in simple_history/models.py - About 2 hrs to fix

        Cognitive Complexity

        Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

        A method's cognitive complexity is based on a few simple rules:

        • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
        • Code is considered more complex for each "break in the linear flow of the code"
        • Code is considered more complex when "flow breaking structures are nested"

        Further reading

        Cyclomatic complexity is too high in function transform_field. (8)
        Open

        def transform_field(field):
    """Customize field appropriately for use in historical model"""
    field.name = field.attname
    if isinstance(field, models.BigAutoField):
        field.__class__ = models.BigIntegerField
        Severity: Minor
        Found in simple_history/models.py by radon

        Cyclomatic Complexity

        Cyclomatic Complexity corresponds to the number of decisions a block of code contains plus 1. This number (also called McCabe number) is equal to the number of linearly independent paths through the code. This number can be used as a guide when testing conditional logic in blocks.

        Radon analyzes the AST tree of a Python program to compute Cyclomatic Complexity. Statements have the following effects on Cyclomatic Complexity:

        Construct Effect on CC Reasoning
        if +1 An if statement is a single decision.
        elif +1 The elif statement adds another decision.
        else +0 The else statement does not cause a new decision. The decision is at the if.
        for +1 There is a decision at the start of the loop.
        while +1 There is a decision at the while statement.
        except +1 Each except branch adds a new conditional path of execution.
        finally +0 The finally block is unconditionally executed.
        with +1 The with statement roughly corresponds to a try/except block (see PEP 343 for details).
        assert +1 The assert statement internally roughly equals a conditional statement.
        Comprehension +1 A list/set/dict comprehension of generator expression is equivalent to a for loop.
        Boolean Operator +1 Every boolean operator (and, or) adds a decision point.

        Source: http://radon.readthedocs.org/en/latest/intro.html

        Cyclomatic complexity is too high in method __init__. (8)
        Open

            def __init__(
        self,
        verbose_name=None,
        verbose_name_plural=None,
        bases=(models.Model,),
        Severity: Minor
        Found in simple_history/models.py by radon

        Cyclomatic Complexity

        Cyclomatic Complexity corresponds to the number of decisions a block of code contains plus 1. This number (also called McCabe number) is equal to the number of linearly independent paths through the code. This number can be used as a guide when testing conditional logic in blocks.

        Radon analyzes the AST tree of a Python program to compute Cyclomatic Complexity. Statements have the following effects on Cyclomatic Complexity:

        Construct Effect on CC Reasoning
        if +1 An if statement is a single decision.
        elif +1 The elif statement adds another decision.
        else +0 The else statement does not cause a new decision. The decision is at the if.
        for +1 There is a decision at the start of the loop.
        while +1 There is a decision at the while statement.
        except +1 Each except branch adds a new conditional path of execution.
        finally +0 The finally block is unconditionally executed.
        with +1 The with statement roughly corresponds to a try/except block (see PEP 343 for details).
        assert +1 The assert statement internally roughly equals a conditional statement.
        Comprehension +1 A list/set/dict comprehension of generator expression is equivalent to a for loop.
        Boolean Operator +1 Every boolean operator (and, or) adds a decision point.

        Source: http://radon.readthedocs.org/en/latest/intro.html

        Cyclomatic complexity is too high in method finalize. (8)
        Open

            def finalize(self, sender, **kwargs):
        inherited = False
        if self.cls is not sender:  # set in concrete
            inherited = self.inherit and issubclass(sender, self.cls)
            if not inherited:
        Severity: Minor
        Found in simple_history/models.py by radon

        Cyclomatic Complexity

        Cyclomatic Complexity corresponds to the number of decisions a block of code contains plus 1. This number (also called McCabe number) is equal to the number of linearly independent paths through the code. This number can be used as a guide when testing conditional logic in blocks.

        Radon analyzes the AST tree of a Python program to compute Cyclomatic Complexity. Statements have the following effects on Cyclomatic Complexity:

        Construct Effect on CC Reasoning
        if +1 An if statement is a single decision.
        elif +1 The elif statement adds another decision.
        else +0 The else statement does not cause a new decision. The decision is at the if.
        for +1 There is a decision at the start of the loop.
        while +1 There is a decision at the while statement.
        except +1 Each except branch adds a new conditional path of execution.
        finally +0 The finally block is unconditionally executed.
        with +1 The with statement roughly corresponds to a try/except block (see PEP 343 for details).
        assert +1 The assert statement internally roughly equals a conditional statement.
        Comprehension +1 A list/set/dict comprehension of generator expression is equivalent to a for loop.
        Boolean Operator +1 Every boolean operator (and, or) adds a decision point.

        Source: http://radon.readthedocs.org/en/latest/intro.html

        Cyclomatic complexity is too high in method history_form_view. (8)
        Open

            def history_form_view(self, request, object_id, version_id, extra_context=None):
        request.current_app = self.admin_site.name
        original_opts = self.model._meta
        model = getattr(
            self.model, self.model._meta.simple_history_manager_attribute
        Severity: Minor
        Found in simple_history/admin.py by radon

        Cyclomatic Complexity

        Cyclomatic Complexity corresponds to the number of decisions a block of code contains plus 1. This number (also called McCabe number) is equal to the number of linearly independent paths through the code. This number can be used as a guide when testing conditional logic in blocks.

        Radon analyzes the AST tree of a Python program to compute Cyclomatic Complexity. Statements have the following effects on Cyclomatic Complexity:

        Construct Effect on CC Reasoning
        if +1 An if statement is a single decision.
        elif +1 The elif statement adds another decision.
        else +0 The else statement does not cause a new decision. The decision is at the if.
        for +1 There is a decision at the start of the loop.
        while +1 There is a decision at the while statement.
        except +1 Each except branch adds a new conditional path of execution.
        finally +0 The finally block is unconditionally executed.
        with +1 The with statement roughly corresponds to a try/except block (see PEP 343 for details).
        assert +1 The assert statement internally roughly equals a conditional statement.
        Comprehension +1 A list/set/dict comprehension of generator expression is equivalent to a for loop.
        Boolean Operator +1 Every boolean operator (and, or) adds a decision point.

        Source: http://radon.readthedocs.org/en/latest/intro.html

        Cyclomatic complexity is too high in method post_save. (7)
        Open

            def post_save(self, instance, created, using=None, **kwargs):
        if not getattr(settings, "SIMPLE_HISTORY_ENABLED", True):
            return
        if not created and hasattr(instance, "skip_history_when_saving"):
            return
        Severity: Minor
        Found in simple_history/models.py by radon

        Cyclomatic Complexity

        Cyclomatic Complexity corresponds to the number of decisions a block of code contains plus 1. This number (also called McCabe number) is equal to the number of linearly independent paths through the code. This number can be used as a guide when testing conditional logic in blocks.

        Radon analyzes the AST tree of a Python program to compute Cyclomatic Complexity. Statements have the following effects on Cyclomatic Complexity:

        Construct Effect on CC Reasoning
        if +1 An if statement is a single decision.
        elif +1 The elif statement adds another decision.
        else +0 The else statement does not cause a new decision. The decision is at the if.
        for +1 There is a decision at the start of the loop.
        while +1 There is a decision at the while statement.
        except +1 Each except branch adds a new conditional path of execution.
        finally +0 The finally block is unconditionally executed.
        with +1 The with statement roughly corresponds to a try/except block (see PEP 343 for details).
        assert +1 The assert statement internally roughly equals a conditional statement.
        Comprehension +1 A list/set/dict comprehension of generator expression is equivalent to a for loop.
        Boolean Operator +1 Every boolean operator (and, or) adds a decision point.

        Source: http://radon.readthedocs.org/en/latest/intro.html

        Cyclomatic complexity is too high in function update_change_reason. (7)
        Open

        def update_change_reason(instance, reason):
    attrs = {}
    model = type(instance)
    manager = instance if instance.pk is not None else model
    history = get_history_manager_for_model(manager)
        Severity: Minor
        Found in simple_history/utils.py by radon

        Cyclomatic Complexity

        Cyclomatic Complexity corresponds to the number of decisions a block of code contains plus 1. This number (also called McCabe number) is equal to the number of linearly independent paths through the code. This number can be used as a guide when testing conditional logic in blocks.

        Radon analyzes the AST tree of a Python program to compute Cyclomatic Complexity. Statements have the following effects on Cyclomatic Complexity:

        Construct Effect on CC Reasoning
        if +1 An if statement is a single decision.
        elif +1 The elif statement adds another decision.
        else +0 The else statement does not cause a new decision. The decision is at the if.
        for +1 There is a decision at the start of the loop.
        while +1 There is a decision at the while statement.
        except +1 Each except branch adds a new conditional path of execution.
        finally +0 The finally block is unconditionally executed.
        with +1 The with statement roughly corresponds to a try/except block (see PEP 343 for details).
        assert +1 The assert statement internally roughly equals a conditional statement.
        Comprehension +1 A list/set/dict comprehension of generator expression is equivalent to a for loop.
        Boolean Operator +1 Every boolean operator (and, or) adds a decision point.

        Source: http://radon.readthedocs.org/en/latest/intro.html

        Cyclomatic complexity is too high in method _model_from_natural_key. (6)
        Open

            def _model_from_natural_key(self, natural_key):
        try:
            app_label, model = natural_key.split(".", 1)
        except ValueError:
            model = None
        Severity: Minor
        Found in simple_history/management/commands/populate_history.py by radon

        Cyclomatic Complexity

        Cyclomatic Complexity corresponds to the number of decisions a block of code contains plus 1. This number (also called McCabe number) is equal to the number of linearly independent paths through the code. This number can be used as a guide when testing conditional logic in blocks.

        Radon analyzes the AST tree of a Python program to compute Cyclomatic Complexity. Statements have the following effects on Cyclomatic Complexity:

        Construct Effect on CC Reasoning
        if +1 An if statement is a single decision.
        elif +1 The elif statement adds another decision.
        else +0 The else statement does not cause a new decision. The decision is at the if.
        for +1 There is a decision at the start of the loop.
        while +1 There is a decision at the while statement.
        except +1 Each except branch adds a new conditional path of execution.
        finally +0 The finally block is unconditionally executed.
        with +1 The with statement roughly corresponds to a try/except block (see PEP 343 for details).
        assert +1 The assert statement internally roughly equals a conditional statement.
        Comprehension +1 A list/set/dict comprehension of generator expression is equivalent to a for loop.
        Boolean Operator +1 Every boolean operator (and, or) adds a decision point.

        Source: http://radon.readthedocs.org/en/latest/intro.html

        Cyclomatic complexity is too high in method handle. (6)
        Open

            def handle(self, *args, **options):
        self.verbosity = options["verbosity"]

        to_process = set()
        model_strings = options.get("models", []) or args
        Severity: Minor
        Found in simple_history/management/commands/populate_history.py by radon

        Cyclomatic Complexity

        Cyclomatic Complexity corresponds to the number of decisions a block of code contains plus 1. This number (also called McCabe number) is equal to the number of linearly independent paths through the code. This number can be used as a guide when testing conditional logic in blocks.

        Radon analyzes the AST tree of a Python program to compute Cyclomatic Complexity. Statements have the following effects on Cyclomatic Complexity:

        Construct Effect on CC Reasoning
        if +1 An if statement is a single decision.
        elif +1 The elif statement adds another decision.
        else +0 The else statement does not cause a new decision. The decision is at the if.
        for +1 There is a decision at the start of the loop.
        while +1 There is a decision at the while statement.
        except +1 Each except branch adds a new conditional path of execution.
        finally +0 The finally block is unconditionally executed.
        with +1 The with statement roughly corresponds to a try/except block (see PEP 343 for details).
        assert +1 The assert statement internally roughly equals a conditional statement.
        Comprehension +1 A list/set/dict comprehension of generator expression is equivalent to a for loop.
        Boolean Operator +1 Every boolean operator (and, or) adds a decision point.

        Source: http://radon.readthedocs.org/en/latest/intro.html

        Cyclomatic complexity is too high in method create_history_model. (6)
        Open

            def create_history_model(self, model, inherited):
        """
        Creates a historical model to associate with the model provided.
        """
        attrs = {
        Severity: Minor
        Found in simple_history/models.py by radon

        Cyclomatic Complexity

        Cyclomatic Complexity corresponds to the number of decisions a block of code contains plus 1. This number (also called McCabe number) is equal to the number of linearly independent paths through the code. This number can be used as a guide when testing conditional logic in blocks.

        Radon analyzes the AST tree of a Python program to compute Cyclomatic Complexity. Statements have the following effects on Cyclomatic Complexity:

        Construct Effect on CC Reasoning
        if +1 An if statement is a single decision.
        elif +1 The elif statement adds another decision.
        else +0 The else statement does not cause a new decision. The decision is at the if.
        for +1 There is a decision at the start of the loop.
        while +1 There is a decision at the while statement.
        except +1 Each except branch adds a new conditional path of execution.
        finally +0 The finally block is unconditionally executed.
        with +1 The with statement roughly corresponds to a try/except block (see PEP 343 for details).
        assert +1 The assert statement internally roughly equals a conditional statement.
        Comprehension +1 A list/set/dict comprehension of generator expression is equivalent to a for loop.
        Boolean Operator +1 Every boolean operator (and, or) adds a decision point.

        Source: http://radon.readthedocs.org/en/latest/intro.html

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