Writing contacts to file, reading contacts from file and printing in ascending order of names.

s16q01_solution.py

''' Writing contacts to file, reading contacts from file and printing in ascending order of names '''

def creating_file():
    FH = open("C:\\Users\\Ojha\\Documents\\Python exercises\\Python Scripts\\Contact_list.txt", 'w')
    return FH

def name_input():
    name = input("Provide contact person name: ")
    final_name = name.capitalize()
    return final_name

def contact_number_input():
    return input("Provide contact number: ")

def write_contacts_to_file(FH):
    contacts = dict()
    name = name_input()
    while name != '':
        contact_number = int(contact_number_input())
        contacts[name] = contact_number
        name = name_input()
    for name, contact_number in contacts.items():
        FH.write(name + ':' + str(contact_number) + '\n')
    FH.close()

def reading_from_file():
    with open("C:\\Users\\Ojha\\Documents\\Python exercises\\Python Scripts\\Contact_list.txt", 'r') as FH:
        text = FH.read()
        details = text.split()
        contacts = dict()
        for detail in details:
            item = detail.split(':')
            contacts[item[0]] = int(item[1])
        return contacts
    
def printing(contacts):
    all_names = contacts.keys()
    sorted_names = sorted(all_names)
    for name in sorted_names:
        print(name + ':' + str(contacts[name]))        

# main starts here
if __name__ == '__main__':
    FH = creating_file()
    write_contacts_to_file(FH)
    contacts = reading_from_file()
    printing(contacts)