Validating user input with c sex dating in bothell washington
Return to the start of the loop continue else: #age was successfully parsed! break if age while True: data = input("Please enter a loud message (must be all caps): ") if not data.isupper(): print("Sorry, your response was not loud enough.") continue else: #we're happy with the value given. break while True: data = input("Pick an answer from A to D:") if data.lower() not in ('a', 'b', 'c', 'd'): print("Not an appropriate choice.") else: break data = input("Please enter a loud message (must be all caps): ") while not data.isupper(): print("Sorry, your response was not loud enough.") data = input("Please enter a loud message (must be all caps): ") age = None while age is None: input_value = raw_input("Please enter your age: ") try: # try and convert the string input to a number age = int(input_value) except Value Error: # tell the user off print " is not a number, please enter a number only".format(input=input_value) if age In some cases, you may need the age just once and then there is no use of that function.
One may want to use a function and throw it away after the job is done.
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Questions like this one are asked often enough to justify writing a post that can concisely answer all of them.while True: try: # Note: Python 2.x users should use raw_input, the equivalent of 3.x's input age = int(input("Please enter your age: ")) except Value Error: print("Sorry, I didn't understand that.") #better try again... Copyright © 2008 The Extensible Markup Language (XML) is a subset of SGML that is completely described in this document.Its goal is to enable generic SGML to be served, received, and processed on the Web in the way that is now possible with HTML.If the purpose of registration is to confirm that the person exists, and that they have supplied a valid email address, then as part of the registration processe you a should either email them a random password or a confirmation token rather than letting them choose their own password and use it immediately.The code presented below would then be used for letting the user change their password.You might prefer to have these numbers output as, for example, 3.14159, 1050.00, and 43.58.Java has a "formatted output" capability that makes it easy to control how real numbers and other values are printed. I will cover just a few of the simplest and most commonly used possibilities here.Because the input type obscures the text typed, you should let the user confirm that they haven't made a mistake.The simplest way to do this is to have the password entered twice, and then check that they are identical.This section explains how to get data from the user, and it covers output in more detail than we have seen so far.It also has a section on using files for input and output. (Generally, this means that the string is displayed to the user; however, in GUI programs, it outputs to a place where a typical user is unlikely to see it.