Can I make my code more concise?

1   import sys
2   import bitcoin
3   
4   tickets_stock = 200
5   USD_TICKET_PRICE = 14
6   event = 'Monty Python Q&A Session'
7   bitcoin_exchange_rate = bitcoin.bitcoin_price()
8   name = input('What is your name?: ').title()
9   
10  
11  def print_welcome():
12      if tickets_stock == 0:
13          sys.exit('Sorry we\'re all out of tickets!')
14  
15      print(f'\nHello {name}!')
16      print('\n----------------------\n')
17      print('Welcome to the CLI Ticketing System')
18      print('----------------------\n')
19  
20      print(f'We are currently selling tickets for the {event}')
21      print(f'Each ticket costs: ${USD_TICKET_PRICE}\n')
22  
23  
24  def show_ticket_stock():
25      if tickets_stock == 1:
26          print('We\'re down to our last ticket!')
27      elif 1 < tickets_stock < 100:
28          print(f'Buy now! We only have {tickets_stock} tickets remaining!\n')
29      elif tickets_stock > 100:
30          print(f'There are currently {tickets_stock} tickets remaining.')
31  
32  
33  def ticket_quantity_request():
34      while True:
35          try:
36              tickets_request = int(input('How many tickets would you like to purchase?: '))
37              while tickets_request > tickets_stock:
38                  print(f'Sorry, we only have {tickets_stock} tickets in stock! Try again...\n')
39                  tickets_request = int(input('How many tickets would you like to purchase?: '))
40              return tickets_request
41          except ValueError:
42              print('\nOops! That was an invalid number. Try again...')
43  
44  
45  def calculate_purchase_cost(tickets):
46      return tickets * USD_TICKET_PRICE
47  
48  
49  def usd_to_bitcoin(cost):
50      return cost / bitcoin_exchange_rate
51  
52  
53  def ask_for_payment_method():
54      while True:
55          try:
56              payment_method = input('Will you be paying using a Credit Card or by Bitcoin? (c/b): ')
57              if payment_method == 'c':
58                  print('\nSelected payment method: Credit Card\n')
59                  return 'usd'
60              elif payment_method == 'b':
61                  print('\nSelected payment method: Bitcoin\n')
62                  return 'bitcoin'
63              else:
64                  print(f'Hmm... I didn\'t understand {payment_method}')
65          except BaseException as e:
66              print('\nHmm, there was an error: ' + str(e))
67  
68  
69  def payment_method_symbol(payment_method):
70      if payment_method == 'bitcoin':
71          return '฿'
72      elif payment_method == 'usd':
73          return '$'
74  
75  
76  def cost_string(symbol, cost):
77      return f'{symbol}{cost}'
78  
79  
80  def cost_string_after_considering_payment_method(tickets, payment_method):
81      usd_cost = calculate_purchase_cost(tickets)
82      currency_symbol = payment_method_symbol(payment_method)
83      if payment_method == 'usd':
84          return cost_string(currency_symbol, usd_cost)
85      elif payment_method == 'bitcoin':
86          cost_in_bitcoin = usd_to_bitcoin(usd_cost)
87          return cost_string(currency_symbol, cost_in_bitcoin)
88  
89  
90  def confirm_purchase(tickets, string):
91      while True:
92          response = input(f'You are purchasing {tickets} tickets for {string}. '
93                           f'\nIs this order correct? (y/n): ')
94          if response == 'y':
95              purchase_tickets(tickets, string)
96              return tickets
97          elif response == 'n':
98              print(f'Cancelling order...')
99              break
100         elif response == ('exit' or 'e' or 'c' or 'cancel'):
101             print('Your order was canceled')
102             sys.exit()
103         else:
104             print(f'\nHmm, I don\'t recognize the option "{response}"...\n')
105 
106 
107 def purchase_tickets(tickets, string):
108     response = input('Purchase tickets (p): ')
109     if response == 'p':
110         print('\nPurchase complete...')
111 
112         print(f'\n\nPurchase Confirmation for {name}:')
113         print('---------------')
114         print(f'Thank you {name}! Your payment of {string} was received.')
115         print('\n***')
116         print(f'Congratulations! You now have {tickets} tickets to the "{event}"')
117         print('***')
118         sys.exit()
119     else:
120         print('goodbye...')
121         sys.exit()
122 
123 
124 def create_order():
125     ticket_quantity = tick et_quantity_request()
126     payment_method = ask_for_payment_method()
127     show_cost = cost_string_after_considering_payment_method(ticket_quantity, payment_method)
128     confirm_purchase(ticket_quantity, show_cost)
129     purchase_tickets(ticket_quantity, show_cost)
130     return
131 
132 
133 def main():
134     print_welcome()
135     show_ticket_stock()
136     create_order()
137 
138 
139 if __name__ == '__main__':
140     main()
141 

1   import json
2   
3   
4   def bitcoin_price():
5       try:
6           import urllib.request as urllib2
7       except ImportError:
8           raise ImportError('There was a problem importing urllib2')
9   
10      url = "http://api.coindesk.com/v1/bpi/currentprice/EUR.json"
11  
12      json_url = urllib2.urlopen(url)
13      json_object = json.load(json_url)
14  
15      exchange_rate = json_object['bpi']['USD']['rate']
16  
17      return float(exchange_rate.replace(',', ''))
18