How to use One function for different Purposes

Question

def Cond_Check():
while True:
try:
n=input()
n=int(n)
break
except ValueError:
print("Input must be in NUMBERS")

i want to this type output using the Above function
Enter Book Id
Enter Customer Id
Enter Book Quantity
I want i use the above function and used it for book id customer id and book quantity
For example the user enter id in string
This message should be displayed
Enter Book Id: shshhd
Input must be In numbers
Enter Bool Id:

Answer 1

I suppose the function you show here means something like “condition check”. You like to get an input as int and handle exceptions that occurs. This does run in a while loop. If no exception is raised break is used to exit while loop. what you need additional is to return the input value back to manage program flow. Instead of break you can use return and send int back.

May be you want this:

def Cond_Check():
while True:
try:
n=int(input())
#n=int(n)
#break
return n
except ValueError:
print("Input must be in NUMBERS")

Answer 2

infinite loop and an input inside it may not be the best combo.

def Cond_Check(n):
while True:
try:
n = int(n)
return n
except ValueError:
return "Input must be in NUMBERS"
print(Cond_Check(input()))

Answer 3

Here is an other idea that works without exception handling:

def check(choice):
while True:
inp = input()
if inp.isdigit() and inp in choice:
return inp

res = check('1 2 3')

print('program flow selected ',res)

or even simply:

def check(choice):
while True:
inp = input()
if inp in choice:
return inp

res = check('123')

print('program flow selected ',res)

Answer 4

hi, here is a sample of how a dict can be dumped to a jason file in the first step. Second step is to read dict back from file and compare it to original dict.
Using jason is from my point of view the most simple way to serialize data / objects to a file.

import json

books = {
'1': ['Riverboat', 'Sam Gold', 22.50], '2': ['Birds', 'Fred Vargas', 15.99], '3': ['Mountains', 'Carol Brown', 17.00]
}

print('befor writing: \n', books) #
# write dict to json file
with open('books.txt', 'w') as json_file:
json.dump(books, json_file)

# read dict back from json file
with open('books.txt') as f_in:
my_data = json.load(f_in)
print('\nafter reading: \n', my_data) # for test only
# check if original dict is same as dict resored from file
print(books == my_data)

All print statements are only to demonstrate the procedure and can be removed.

https://code.sololearn.com/c6i2Xq4DJvx5/?ref=app

Answer 5

How can I use files in my project

Answer 6

Use a class

Answer 7

No i cant i just have to use function only

Answer 8

Yeah thankew Is it good to create 4 four split function for diffrernt palces like i have use for Book id one function for customer id another for conditions another

Answer 9

Lothar can i implement my project using Files??
I want to store all data of dictionries in files can i do this? If yes then how i need u r hell

Answer 10

Abdul Wahab this splits the string by any given letter. Will this suffice??

import re
n = "a2s481z23b22cc"
print(list(filter(None, re.split("[a-z]", n))))

['2', '481', '23', '22']

Answer 11

download python/IDEs, play around in the scripts and save them as .py files.

Or, you know, you can also save code here in sololearn.

Answer 12

Thanksssss got it thinking to use this in my project even Our teacher didnot asked to use files 😊😊