How should i add string contain whitespace using function?-CodePudding

I am using a function for my validation for string. I am currently encountering an error with whitespace how should I do modify my code for users able to input

def Update_StringValidation(message):
    while True:
        inputs = input(message).lower()
        if inputs.isalpha():
            return inputs
        else:
            print("Invalid option. please only enter alphabets")

this is my input code for user i have one more function for Y/N for that my function of validation is working

update_user = vaildate_YN(f"Are u sure to update (Y/N)? ")
            if update_user == "y":
                    # selected customer name to update
                    print(
                        f"Package Name: {found_package['Package Name']} Customer Name: {found_package['Customer Name']} "
                        f"Number of Pax: {found_package['Number of Pax']} Package Cost (per pax): {found_package['Package Cost (per pax)']}")

                    customer_name = Update_StringValidation("Enter updated customer name: ")
                    package_name = Update_StringValidation("Enter updated package name: ")
                    number_pax = update_IntValidation("Enter updated pax:")
                    pax_cost = update_IntValidation("Enter updated cost per pax: $")

                    found_package["Customer Name"] = customer_name
                    found_package["Package Name"] = package_name
                    found_package["Number of Pax"] = number_pax
                    found_package["Package Cost (per pax)"] = pax_cost

                    print("Successfully updated")
                    # Display successfully updated
                    print(
                        f"Package Name: {found_package['Package Name']} Customer Name: {found_package['Customer Name']} "
                        f"Number of Pax: {found_package['Number of Pax']} Package Cost (per pax): {found_package['Package Cost (per pax)']}")

CodePudding user response：

print(' '.isalpha())

Result : False

Your condition isalpha is too restrictive for your needs

CodePudding user response：

You can use a regular expression to perform string checks, like this one: ^[a-zA-Z] $.

You can use it in your program like this:

import re
pattern = re.compile(r"^[a-zA-Z] $")

def Update_StringValidation(message):
   while True:
      inputs = input(message).lower()
      if pattern.match(inputs)
         return inputs
      else:
         print("Invalid option. please only enter alphabets")

Proof of work: link