Check whether the string given by the user belongs to the text file or not using Python 3. A user has to give an input of a string. The script will check whether the string is there in the text file or not.
My objectives are
- Printing “Matched” if the input string is there in the text file.
- When user gives no input it tells user to “Enter a string” until gets any value.
- If the string is not there in the text file, it tells user to give an input again until the result is “Matched”.
I have written the script in two different ways.
- try and except
I was stuck at completing my 3rd objective using if-else method. The “continue” statement in the else part was not working as the way I wanted. SanketDG from dgplug has helped me to achieve what I wanted , so thanks to him 🙂
#!/usr/bin/env python3 #Open the file fobj = open("example.txt") text = fobj.read().strip().split() #Conditions while True: s = input("Enter a string: ") #Takes input of a string from user if s == "": #if no value is entered for the string continue if s in text: #string in present in the text file print("Matched") break else: #string is absent in the text file print("No such string found,try again") continue fobj.close()
Using try and except
#!/usr/bin/env python3 with open("example.txt") as fobj: text = fobj.read().strip().split() while True: try: s = input("Enter a string: ") if s == "": continue if s in text: print("Matched") break raise Exception("No such string found, try again") except Exception as e: print(e)
Modifications of the scripts are always welcome. Please leave comments for any kind of modification 🙂