contract.py

class contract:
    
  def __init__(self, start_month, payment_frequency, value, term, contract_name, increase_period=1, increase_percentage=0):
    self.start_month = start_month # The month (zero based int) at which the contract starts 
    self.payment_frequency = payment_frequency # The frequency of payments (e.g. 1 for monthly, 3 for quarterly, 12 for annually)
    self.value = value # The money recieved from the contract
    self.term = term # The duration of the contract in months
    self.contract_name = contract_name # An identifier for the contract
    self.increase_period = increase_period # Optional frequency of price increases (e.g. 12 for an annual inflation)
    self.increase_percentage = increase_percentage # Optional percentage increase (e.g. 2.5 for a 2.5% price increase)