#11 Python Input Validation & Error Handling Made Easy | Data Science for Beginners in Tamil

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Welcome to Episode 11 of our Data Science and Machine Learning Series with your host Dinesh! In this session, we dive deep into essential programming practices like handling invalid inputs, exception management, and Python functions — all while keeping motivation high and the learning interactive.

⏳ Timestamps for Quick Navigation
[00:05] Motivational intro for Episode 11 | Data Science & Machine Learning
[01:26] Valid number input rules in Python number guessing game
[02:45] Exception handling for invalid characters in Python programs
[04:19] Input validation techniques & user error messages in Python
[05:20] Game rules explained: character recognition & scoring errors
[06:04] Python exception handling & built-in function overview
[08:01] Simplifying data science concepts with Dinesh
[09:09] Next episode announcement + audience story sharing

🎯 Key Takeaways from This Episode:
✅ Handle invalid inputs and avoid common Python input errors.
✅ Master practical exception handling, including zero division errors.
✅ Understand Python basics: variables, inputs, outputs, functions.
✅ Learn with simple, real-world coding examples for beginners.
✅ Join the community — share feedback, stories, and ideas!

🔥 Who Should Watch This Video?
🎓 Beginners in Python programming
💼 Career switchers & data science learners
📊 Freelancers exploring logic-based applications
🖥️ Anyone interested in gamifying coding practice

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[arulrajveerappan]

step by step improvement of number guessing program is really very good following from previous session

[azmi-id]

Hi Sri ❤ I'm so excited to next topic

[ganeshmanoharan]

yes now i was able to see how the exceptional can be handled

[MultiShanu]

I've never understood these concepts so easily before, you're really great at explaining things!

[ChandruChandru-ndhz]

Sri !! Niga welcome pannura vitham oru energetic ka irruku class paka aasaiya irruku sir🎉🎉

[meerareddy-id]

Yeah, you are right, I was scared about error handling topic, now I got some understanding, thanks 🙏.

[MithraSiva]

Learning from scratch . Eagerly waiting for your next vedio 🎉🎉

[jaivijai-netm]

Superb coach, try and except naan ippathaan puthusa learn panran 👍💯

[Asvanth-ft]

Anna exceptional handling purinchiii ❤💯💯🙌

[abdullahazaam]

error handling is so must in programming, you have to go on fire sir!

[borninjujune]

Can you please clarify on where to use the ":" colon and where not to use it? I see it is not used at "print, elif" and used at "else, for, if" etc. But not sure. Please let me know.

[blackff]

Exception handling use pannalam anna like
Try
Except exception: or except value error:

[HariKrishna-tm]

Thanks sir, these videos helps a lot and i have an doubt :
i've just built a calculator but i don't know how to get multiple user inputs ;
code :
print('''

+ - Addition
- - Subtraction
* - Multiplication
/ - Division
% - To get the remainder
** - square numbers

while True:
try:
first_number = int(input("Enter your first number"))
second_number = int(input("Enter your second number"))
options = input ("choose you operation to perform(+, -, *, /, %, **)")
if options == "+":
result = first_number + second_number
elif options == "-":
result = first_number - second_number
elif options == "*":
result = first_number * second_number
elif options == "/":
result = first_number / second_number
elif options == "%":
result = first_number % second_number
elif options == "**":
result = first_number ** second_number
else:
print("select operators from the list")
print("result:", result)
except ValueError:
print("Enter a numeric value")
except ZeroDivisionError:
print("Cannot Divide by Zero")

[MithraSiva]

Sir, waiting for your video from 6:30pm.. when will you upload next video?

[tamilproeditz]

print
print ("🙏 Thank You, John Coach! 🙏")
print
print (" ")
print ("I'm ASD ツ, a student from Sri Lanka, currently learning Python through your YouTube channel.")
print ("Iam Just 19 And My future goal is to become a Data Scientist 👨‍💻.")
print ("At first, I just randomly clicked one of your videos. But now, I'm genuinely interested in coding, and I understand things so clearly – all because of you.")
print ("You're my first code teacher, and you'll always be a big part of my journey.")
print ("I’ve been interested in coding and software development since I was young, but I never created the time for it. Now, this feels like the right time for me.")
print ("I sometimes worry that your channel isn’t getting the views it deserves. But great things always take time. Keep it up, John Coach! 💪")
print ("Also, using what you taught, I even created my own number guessing game! 🎮")

print
print (" ")
print (" ")

import random
S_N = random.randint (1, 50)

for i in range (1, 6):
try:

U_I = int(input ("Geuss The Number"))
if U_I < 0 or U_I > 50:
print ("Please Enter A Number Between 0 To 100")
elif U_I == S_N - 1 or U_I == S_N + 1 :
print ("Romba Nerungitte Pangu!!")
elif U_I == S_N - 2 or U_I == S_N + 2 :
print ("Nerungitte Pangu!!")
elif U_I < S_N - 25 or U_I > S_N + 25 :
print ("Romba Thoorathule Irukka Pangu!!")
elif U_I > S_N :
print ("Ithe Vide Sirusu")
elif U_I < S_N :
print ("Ithe vide Perusu")
else:
print (f"{S_N } Is Correct")
break

except ValueError:
print ("Number Type Pannanum Ende Podhu Arivu Koode Ille")


if U_I == S_N :
print (f"Congrats !! You Guessed {S_N } in {i} times")
else:
print ("You Reached Maximum Tries")


print (" ")
print (" ")
print
print (" ")
print (" ")

print ("Neenge Type Pannathulaye Periye Number Paakkalam")
print ("Note: Neenge 2 Number Than Use Panneenganna... Other 3 Values 0 nnu Podunge. BCZ {i} kku Etha Maadhiri Eppdi Input Vaangurathunnu Therla??")
print (" ")

num1 = int(input("Enter first number: "))
num2 = int(input("Enter second number: "))
num3 = int(input("Enter third number: "))
num4 = int(input("Enter Fourth number: "))
num5 = int(input("Enter Fifth number: "))

largest = max(num1, num2, num3, num4, num5)

print(f"The largest number is: {largest}")
print (" ")
print (" ")
print
print (" ")
print (" நன்றி ")
print