281 lines
10 KiB
Python
281 lines
10 KiB
Python
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# importing the module
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import sys
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# this function will be the first to run as soon as the main function executes
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def initial_phonebook():
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rows, cols = int(input("Please enter initial number of contacts: ")), 5
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# We are collecting the initial number of contacts the user wants to have in the
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# phonebook already. User may also enter 0 if he doesn't wish to enter any.
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phone_bookA = open("records.txt", 'a')
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phone_bookR = open("records.txt", 'r')
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print(phone_bookR.read())
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for i in range(rows):
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print("\nEnter contact %d details in the following order (ONLY):" % (i + 1))
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print("NOTE: * indicates mandatory fields")
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print("....................................................................")
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temp = []
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for j in range(cols):
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# We have taken the conditions for values of j only for the personalized fields
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# such as name, number, e-mail id, dob, category etc
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if j == 0:
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temp.append(str(input("Enter name*: ")))
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# We need to check if the user has left the name empty as its mentioned that
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# name & number are mandatory fields.
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# So implement a condition to check as below.
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if temp[j] == '' or temp[j] == ' ':
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sys.exit(
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"Name is a mandatory field. Process exiting due to blank field...")
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# This will exit the process if a blank field is encountered.
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if j == 1:
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temp.append(int(input("Enter number*: ")))
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# We do not need to check if user has entered the number because int automatically
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# takes care of it. Int value cannot accept a blank as that counts as a string.
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# So process automatically exits without us using the sys package.
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if j == 2:
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temp.append(str(input("Enter e-mail address: ")))
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# Even if this field is left as blank, None will take the blank's place
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if temp[j] == '' or temp[j] == ' ':
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temp[j] = None
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if j == 3:
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temp.append(str(input("Enter date of birth(dd/mm/yy): ")))
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# Whatever format the user enters dob in, it won't make a difference to the compiler
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# Only while searching the user will have to enter query exactly the same way as
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# he entered during the input so as to ensure accurate searches
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if temp[j] == '' or temp[j] == ' ':
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# Even if this field is left as blank, None will take the blank's place
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temp[j] = None
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if j == 4:
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temp.append(
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str(input("Enter category(Family/Friends/Work/Others): ")))
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# Even if this field is left as blank, None will take the blank's place
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if temp[j] == "" or temp[j] == ' ':
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temp[j] = None
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for record in temp:
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phone_bookA.write(str(record) + ",")
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phone_bookA.write("\n")
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# By this step we are appending a list temp into a list phone_book
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# That means phone_book is a 2-D array and temp is a 1-D array
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print(phone_bookR.read())
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return phone_bookR.read()
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def menu():
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# We created this simple menu function for
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# code reusability & also for an interactive console
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# Menu func will only execute when called
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print("********************************************************************")
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print("\t\t\tSMARTPHONE DIRECTORY", flush=False)
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print("********************************************************************")
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print("\tYou can now perform the following operations on this phonebook\n")
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print("1. Add a new contact")
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print("2. Remove an existing contact")
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print("3. Delete all contacts")
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print("4. Search for a contact")
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print("5. Display all contacts")
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print("6. Exit phonebook")
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# Out of the provided 6 choices, user needs to enter any 1 choice among the 6
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# We return the entered choice to the calling function wiz main in our case
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choice = int(input("Please enter your choice: "))
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return choice
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def add_contact():
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# Adding a contact is the easiest because all you need to do is:
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# append another list of details into the already existing list
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dip = []
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for i in range(5):
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if i == 0:
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dip.append(str(input("Enter name: ")))
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if i == 1:
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dip.append(str(input("Enter number: ")))
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if i == 2:
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dip.append(str(input("Enter e-mail address: ")))
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if i == 3:
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dip.append(str(input("Enter date of birth(dd/mm/yy): ")))
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if i == 4:
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dip.append(
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str(input("Enter category(Family/Friends/Work/Others): ")))
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pb = open("records.txt", 'a')
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for record in dip:
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pb.write(record + ",")
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pb.write("\n")
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pb.close()
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def remove_existing():
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pbr = open("records.txt", 'r')
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pbw = open("records.txt", 'w')
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# This function is to remove a contact's details from existing phonebook
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query = str(
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input("Please enter the name of the contact you wish to remove: "))
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# We'll collect name of the contact and search if it exists in our phonebook
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pb = []
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temp = 0
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# temp is a checking variable here. We assigned a value 0 to temp.
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for i in range(len(pb)):
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if query == pbr[i][0]:
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temp += 1
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# Temp will be incremented & it won't be 0 anymore in this function's scope
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print(pb.pop(i))
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# The pop function removes entry at index i
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print("This query has now been removed")
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# printing a confirmation message after removal.
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# This ensures that removal was successful.
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# After removal we will return the modified phonebook to the calling function
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# which is main in our program
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return pb
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if temp == 0:
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# Now if at all any case matches temp should've incremented but if otherwise,
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# temp will remain 0 and that means the query does not exist in this phonebook
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print("Sorry, you have entered an invalid query.\
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Please recheck and try again later.")
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return pb
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def delete_all():
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# This function will simply delete all the entries in the phonebook pb
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# It will return an empty phonebook after clearing
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pb = open("records.txt", 'w')
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pb.write("")
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def search_existing():
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# This function searches for an existing contact and displays the result
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choice = int(input("Enter search criteria\n\n\
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1. Name\n2. Number\n3. Email-id\n4. DOB\n5. Category(Family/Friends/Work/Others)\
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\nPlease enter: "))
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# We're doing so just to ensure that the user experiences a customized search result
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temp = []
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check = -1
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if choice == 1:
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# This will execute for searches based on contact name
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query = str(
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input("Please enter the name of the contact you wish to search: "))
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for i in range(len(pb)):
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if query == pb[i][0]:
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check = i
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temp.append(pb[i])
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elif choice == 2:
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# This will execute for searches based on contact number
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query = int(
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input("Please enter the number of the contact you wish to search: "))
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for i in range(len(pb)):
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if query == pb[i][1]:
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check = i
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temp.append(pb[i])
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elif choice == 3:
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# This will execute for searches based on contact's e-mail address
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query = str(input("Please enter the e-mail ID\
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of the contact you wish to search: "))
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for i in range(len(pb)):
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if query == pb[i][2]:
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check = i
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temp.append(pb[i])
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elif choice == 4:
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# This will execute for searches based on contact''s date of birth
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query = str(input("Please enter the DOB (in dd/mm/yyyy format ONLY)\
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of the contact you wish to search: "))
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for i in range(len(pb)):
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if query == pb[i][3]:
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check = i
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temp.append(pb[i])
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elif choice == 5:
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# This will execute for searches based on contact category
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query = str(
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input("Please enter the category of the contact you wish to search: "))
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for i in range(len(pb)):
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if query == pb[i][4]:
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check = i
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temp.append(pb[i])
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# All contacts under query category will be shown using this feature
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else:
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# If the user enters any other choice then the search will be unsuccessful
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print("Invalid search criteria")
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return -1
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# returning -1 indicates that the search was unsuccessful
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# all the searches are stored in temp and all the results will be displayed with
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# the help of display function
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if check == -1:
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return -1
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# returning -1 indicates that the query did not exist in the directory
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else:
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display_all(temp)
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return check
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# we're just returning a index value wiz not -1 to calling function just to notify
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# that the search worked successfully
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# this function displays all content of phonebook pb
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def display_all(pb):
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if not pb:
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# if display function is called after deleting all contacts then the len will be 0
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# And then without this condition it will throw an error
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print("List is empty: []")
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else:
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for i in range(len(pb)):
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print(pb[i])
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def thanks():
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# A simple gesture of courtesy towards the user to enhance user experience
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print("********************************************************************")
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print("Thank you for using our Smartphone directory system.")
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print("Please visit again!")
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print("********************************************************************")
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sys.exit("Goodbye, have a nice day ahead!")
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# Main function code
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print("....................................................................")
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print("Hello dear user, welcome to our smartphone directory system")
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print("You may now proceed to explore this directory")
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print("....................................................................")
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# This is solely meant for decoration purpose only.
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# You're free to modify your interface as per your will to make it look interactive
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ch = 1
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initial_phonebook()
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while ch in (1, 2, 3, 4, 5):
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ch = menu()
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if ch == 1:
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add_contact()
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elif ch == 2:
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remove_existing()
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elif ch == 3:
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delete_all()
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elif ch == 4:
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d = search_existing()
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if d == -1:
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print("The contact does not exist. Please try again")
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elif ch == 5:
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display_all()
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else:
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thanks()
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