old_contents: import datetime
  from collections import OrderedDict
  
  from django.db.models import Count
  
  from .models import FInstance
  
  def date_range(start, end, intv):
      start = datetime.datetime.strptime(start,"%Y%m%d")
      end = datetime.datetime.strptime(end,"%Y%m%d")
      diff = (end  - start ) / intv
      for i in range(intv):
          yield (start + diff * i)
      yield end
  
  
  class LineChartGenerator(object):
  
      def __init__(self, project):
          self.project = project
          self.date_list = list(date_range(project.date_created.strftime("%Y%m%d"), datetime.datetime.today().strftime("%Y%m%d"), 6))
  
      def get_count(self, date):
          return self.project.project_instances.filter(date__lte=date.date()).count()
  
      def data(self):
          d = OrderedDict()
          dt = self.date_list
          for date in dt:
              count = self.get_count(date)
              d[date.strftime('%Y-%m-%d')] = count
          return d
  
  
  class LineChartGeneratorOrganization(object):
  
      def __init__(self, organization):
          self.organization = organization
          self.date_list = list(date_range(organization.date_created.strftime("%Y%m%d"), datetime.datetime.today().strftime("%Y%m%d"), 6))
  
      def get_count(self, date):
          date = date + datetime.timedelta(days=1)
          return FInstance.objects.filter(project__organization=self.organization, date__lte=date.date()).count()
  
      def data(self):
          d = OrderedDict()
          dt = self.date_list
          for date in dt:
              count = self.get_count(date)
              d[date.strftime('%Y-%m-%d')] = count
          return d
  
  
  class LineChartGeneratorSite(object):
  
      def __init__(self, site):
          self.site = site
          self.date_list = list(date_range(site.date_created.strftime("%Y%m%d"), datetime.datetime.today().strftime("%Y%m%d"), 6))
  
      def get_count(self, date):
          return self.site.site_instances.filter(date__lte=date.date()).count()
  
      def data(self):
          d = OrderedDict()
          dt = self.date_list
          for date in dt:
              count = self.get_count(date)
              d[date.strftime('%Y-%m-%d')] = count
          return d
  
  
  
new_contents: import datetime
  from collections import OrderedDict
  
  from django.db.models import Count
  
  from .models import FInstance
  
  def date_range(start, end, intv):
      start = datetime.datetime.strptime(start,"%Y%m%d")
      end = datetime.datetime.strptime(end,"%Y%m%d")
      diff = (end  - start ) / intv
      for i in range(intv):
          yield (start + diff * i)
      yield end
  
  
  class LineChartGenerator(object):
  
      def __init__(self, project):
          self.project = project
          self.date_list = list(date_range(project.date_created.strftime("%Y%m%d"), datetime.datetime.today().strftime("%Y%m%d"), 6))
  
      def get_count(self, date):
          date = date + datetime.timedelta(days=1)
          return self.project.project_instances.filter(date__lte=date.date()).count()
  
      def data(self):
          d = OrderedDict()
          dt = self.date_list
          for date in dt:
              count = self.get_count(date)
              d[date.strftime('%Y-%m-%d')] = count
          return d
  
  
  class LineChartGeneratorOrganization(object):
  
      def __init__(self, organization):
          self.organization = organization
          self.date_list = list(date_range(organization.date_created.strftime("%Y%m%d"), datetime.datetime.today().strftime("%Y%m%d"), 6))
  
      def get_count(self, date):
          date = date + datetime.timedelta(days=1)
          return FInstance.objects.filter(project__organization=self.organization, date__lte=date.date()).count()
  
      def data(self):
          d = OrderedDict()
          dt = self.date_list
          for date in dt:
              count = self.get_count(date)
              d[date.strftime('%Y-%m-%d')] = count
          return d
  
  
  class LineChartGeneratorSite(object):
  
      def __init__(self, site):
          self.site = site
          self.date_list = list(date_range(site.date_created.strftime("%Y%m%d"), datetime.datetime.today().strftime("%Y%m%d"), 6))
  
      def get_count(self, date):
          date = date + datetime.timedelta(days=1)
          return self.site.site_instances.filter(date__lte=date.date()).count()
  
      def data(self):
          d = OrderedDict()
          dt = self.date_list
          for date in dt:
              count = self.get_count(date)
              d[date.strftime('%Y-%m-%d')] = count
          return d
  
  
  
subject: clean up