def print_numbers(numbers): print("Telephone Numbers:") for k, v in numbers.items(): print("Name:", k, "\tNumber:", v) print() def add_number(numbers, name, number): numbers[name] = number def lookup_number(numbers, name): if name in numbers: return "The number is " + numbers[name] else: return name + " was not found" def remove_number(numbers, name): if name in numbers: del numbers[name] else: print(name," was not found") def load_numbers(numbers, filename): in_file = open(filename, "rt") while True: in_line = in_file.readline() if not in_line: break in_line = in_line[:-1] name, number = in_line.split(",") numbers[name] = number in_file.close() def save_numbers(numbers, filename): out_file = open(filename, "wt") for k, v in numbers.items(): out_file.write(k + "," + v + "\n") out_file.close() def print_menu(): print('1. Print Phone Numbers') print('2. Add a Phone Number') print('3. Remove a Phone Number') print('4. Lookup a Phone Number') print('5. Load numbers') print('6. Save numbers') print('7. Quit') print() phone_list = {} menu_choice = 0 print_menu() while True: menu_choice = int(input("Type in a number (1-7): ")) if menu_choice == 1: print_numbers(phone_list) elif menu_choice == 2: print("Add Name and Number") name = input("Name: ") phone = input("Number: ") add_number(phone_list, name, phone) elif menu_choice == 3: print("Remove Name and Number") name = input("Name: ") remove_number(phone_list, name) elif menu_choice == 4: print("Lookup Number") name = input("Name: ") print(lookup_number(phone_list, name)) elif menu_choice == 5: filename = input("Filename to load: ") load_numbers(phone_list, filename) elif menu_choice == 6: filename = input("Filename to save: ") save_numbers(phone_list, filename) elif menu_choice == 7: break else: print_menu() print("Goodbye")
Monday, November 24, 2014
python file input output example
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Python
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