Force correct input python

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August undefined, 2024

WebJun 15, 2016 · You can't force a user to give you specific input. You can use a while loop to check if variable is one of x and o, else keep prompting for correct input. – SvbZ3r0 Jun 15, 2016 at 4:48 Possible duplicate of Asking the user for input until they give a valid response – moooeeeep Oct 8, 2024 at 15:05 Add a comment 4 Answers Sorted by: 1 Webusing required input data from input file. Output the results in output file. You will use recursion to convert prefix expressions directly to postfix expressions. You may not use a stack as you did in Lab 1. Compose a program that accepts a prefix expression containing single letter operands and the operators +, -, *, /, and $ (representing ...

Basic Input, Output, and String Formatting in Python

WebDec 8, 2013 · Since Python 3, input returns a string which you have to explicitly convert to int s, with int, like this x = int (input ("Enter a number: ")) y = int (input ("Enter a number: ")) You can accept numbers of any base and convert them directly to base-10 with the int function, like this WebAug 14, 2024 · Now, there's a better way to break out of the loop without using the helper function break_main_loop (), and that's done like so: def stuff (): pass def main (): # do stuff, e.g. getting other user input () while True: stuff () if str (input ("Do you wish to continue: [y/n]")) == 'n': break #continue doing stuff main () This lets you get rid of ... diploma iz bosne

Asking the user for input until a valid response in Python

WebJun 8, 2024 · To fix the issue of the else statement printing for each iteration of the if statement I created a check and set it to false. I set a condition that set the variable to true if any of the numbers within the range satisfied the condition. WebNov 21, 2012 · For question 1: enter pressed when prompted for input results in an empty string returned (are you using input() in your scripts?). Apparently empty string is not a valid input for your functions. For all I know, whatever you enter as the input, you end up with … beba pre ha zutaten

python - How to force the user to input in a particular format?

python - While loop to check for valid user input? - Stack Overflow

WebThis solution will work except the user will still have to press enter at some point to progress: import time import threading fail = False def time_expired (): print ("Too slow!") fail = True time = threading.Timer (10, time_expired) time.start () prompt = input ("You have 10 seconds to choose the correct answer.\n") if prompt != None and not ... WebJan 8, 2015 · Hair & Beauty Salon – Entity Relationship Diagram (ERD) Creating Logic Gates using Transistors. The Lost Roman Sundial. Art Expo – Code Breaking Challenge. Understanding Binary Data. Work Life Balance (HTML, CSS & JS Challenge) The Birthday Paradox. Elastic Collision in a Pool Game. beba pre ha dmWebApr 1, 2012 · import re while True: inp = input () # raw_input in Python 2.x if re.match (r' [a-zA-Z0-9] {2}- [a-zA-Z0-9] {3}$', inp): return inp print ('Invalid office code, please enter again:') Note that in many other cases, you can simply try … diploma javeriana

"WebIn Python 2, input () reads input from the keyboard, parses and evaluates it as a Python expression, and returns the resulting value. Python 3 … " - Force correct input python

Force correct input python

Basic Input, Output, and String Formatting in Python

WebMay 2, 2024 · i = input ("date (dd/mm/yyyy):") split = i.split ("/") for item in split: try: int (item) except: print ("error") exit () if len (split) != 3 or len (split [0]) not in [1, 2] or len (split [1]) not in [1, 2] or len (split [2]) != 4: print ("error!") else: print ("accepted!") WebDec 12, 2024 · Returns: Return a string value as input by the user. By default input() function helps in taking user input as string. If any user wants to take input as int or float, we just need to typecast it. Refer to all datatypes and examples from here. Python input() Function Example

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WebOct 4, 2012 · 5. Convert the word entirely to lowercase (or uppercase) first: word = input ("Please Enter a word:").lower () # Or `.upper ()`. Also, to get the first letter of your word, use word [0], not word [1]. Lists are zero-indexed in Python and almost all programming languages. You can also condense your code by quite a bit: WebJun 23, 2015 · So an alternative approach is to use an infinite loop and break out on a correct reply: x = None while True: x = raw_input ("Please input a number 1 or 2: ") if x == '1': print '1' break elif x == '2': print '2' break else: print 'Invalid input, try again' print "all OK" Share Follow edited Jun 23, 2015 at 4:43

WebThe user must additionally make sure that the path to the file contains the correct subdirectory name if the file is saved in a subdirectory. The directory where the file is saved not existing or the user not having the proper rights to access it are two more potential causes of the issue. Web(using Python2.7) Here's my code, but it's not working properly: choice = raw_input ('Enjoying the course? (y/n)') student_surveyPromptOn = True while student_surveyPromptOn: if choice != raw_input ('Enjoying the course? (y/n)'): print ("Sorry, I didn't catch that. Enter again: ") else: student_surveyPromptOn = False

WebJul 6, 2015 · In order to ask for more input, you needed to wrap your prompts in a loop. You would then need to add an option to the user to allow them to quit. Also, you can move the prompting for numbers to a function. This would keep asking for number if the user typed in a character. Share Follow edited Jul 6, 2015 at 8:49 answered Jul 6, 2015 at 8:01 WebFeb 14, 2024 · Because Python works with String by default, actually you don't need any casting like int or str Also, if you were using version prior to 3.x, it would be raw_input instead of input. Since your solution seem to have been accepting input, I can be safe assuming that your Python is OK. test = input ('This only takes a string as an answer') …

WebDec 23, 1993 · from datetime import datetime def validate_date (d): try: datetime.strptime (d, '%m/%d/%Y') return True except ValueError: return False print validate_date ('02/26/2009') # prints False However, this will print true even if a single digit is entered for month/day. python string date datetime Share Improve this question Follow

WebMar 29, 2024 · In Python, primitive data types (int, float, str, booleans) are themselves classes. Thus if you instantiate the class attributes of your class before passing the method parameters during object creation, the argument values will be converted if possible (such as from a int to a float) or an exception will be thrown if the data type cannot be ... beba pre milchWebNov 23, 2015 · The following code, is the one I want it to be capitalized. Meaning once the user inputs their answer to the licence plate, I want it to be outputted in capitals: ask2 = "" plate = "" if i... beba pre nahrungWebApr 25, 2014 · The simplest way to accomplish this is to put the input method in a while loop. Use continue when you get bad input, and break out of the loop when you're satisfied. When Your Input Might Raise an Exception Use try and except to detect when the user enters data that can't be parsed. diploma jif