File product.py has 784 lines of code (exceeds 250 allowed). Consider refactoring.

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# -*- coding: utf-8 -*-
from datetime import date, timedelta
from decimal import Decimal

from django.db import models

Product has 33 functions (exceeds 20 allowed). Consider refactoring.

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class Product(BaseProduct, AditionalCostsMixin):
    hr_id = models.CharField(max_length=12, unique=True, null=True)
    float_id = models.CharField(max_length=128, unique=True)
    is_billable = models.BooleanField(default=True)
    area = models.ForeignKey('Area', related_name='products',

Function stats_in_time_frames has a Cognitive Complexity of 9 (exceeds 5 allowed). Consider refactoring.

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    def stats_in_time_frames(self, start_date, end_date, freq,
                             calculation_start_date=None):
        """
        cumulative stats of time frames sliced by freq
        :param start_date: start date of time window, a date object

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Consider simplifying this complex logical expression.

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        if self.end_date and today >= self.end_date:
            return 'Ended'
        elif self.live_date and today >= self.live_date:
            return 'Live'
        elif self.beta_date and today >= self.beta_date:

Function people_costs has 5 arguments (exceeds 4 allowed). Consider refactoring.

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    def people_costs(self, start_date, end_date, contractor_only=False,

Function people_costs has 5 arguments (exceeds 4 allowed). Consider refactoring.

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    def people_costs(self, start_date, end_date, contractor_only=False,

Function phase has a Cognitive Complexity of 7 (exceeds 5 allowed). Consider refactoring.

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    def phase(self):
        today = date.today()
        if self.end_date and today >= self.end_date:
            return 'Ended'
        elif self.live_date and today >= self.live_date:

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Function last_date has a Cognitive Complexity of 7 (exceeds 5 allowed). Consider refactoring.

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    def last_date(self):
        """
        default end date is the date when the last spend occurs or
        the last budget allocated to the product or the specified end date
        it is the greatest of these dates in the product:

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Avoid too many return statements within this function.

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            return 'Not Defined'

Avoid too many return statements within this function.

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            return 'Discovery'