Restricted Input

Important Change

Made a small backward incompatible change. Instead of exclude, use allow. I changed it because:

1. There was a typo anyway. It was exlude instead of exclude!
2. I feel like allow has a better and clearer meaning than exclude. exclude might be confusing sometimes.

Overview

A way of imposing restrictions in input().

For example, if you want the user to only enter numbers, you could use this. Only want uppercase letters? Works here.

It uses msvcrt.getch/alternative in *nix to get the keystroke and check it in real time.

Installation

Install restricted_input from pypi using:

pip install restricted_input

How to use it

Import it

from restricted_input import r_input

r_input is the function which can be used instead of input()

It has five arguments

variable = r_input(prompt, input_type, allow, maxlength, warning)

• prompt: is the prompt to be given for the input dialog. string

• input_type : is the type of data to which the input should be restricted to. string

  It can be

  • "normal": normal text

  • "string_all": Allows only string, space is not allowed

  • "string_upper": Allows only uppercase string, space is not allowed

  • "string_lower": Allows only lowercase string, space is not allowed

  • "specials" Allows only special characters - `` ~ ! @ # $ % ^ & * ( ) - _ = + [ { ] } ; : ' " , < . > / ? \ |`. Space not included

  • "integer": Allows only integers, doesn't allow -, . or space

  • "float" : Allows only integers, including . single time. Space or - not included

  • "version": Allows only integers, including . multiple times. Space or - not included

  • "nothing" . Obviously allows nothing. Useful in scenarios where you need only a limited number of characters.

  To get the list of input_types:

  from restricted_input import get_input_types
  print(get_input_types)

• allow: is the argument for allowing certain characters. string or list

  For example, if you want to allow hyphens in integers, you can use

  r_input("Enter the number: ", "integer", "-")

  If you want to allow input of the character v, a,b and g in version type input, use:

  r_input("Enter the version: ", "version", "vabg")
  # Or
  r_input("Enter the version: ", "version", ["v", "a", "b", "g"])

• maxlength: is the argument for maximum length for input. Useful in scenarios where only single character is required.integer

• warning: is the argument for any warnings is the user has entered something which isn't allowed. string

Example

Issues/limitations

• It will not work in some IDLEs like Spyder or PyCharm. This is because some IDLEs emulate a terminal which might not work with this module. Try to run the program in external terminal.

• You tell me!

Contributing

If you need help, don't hesitate to open an issue. Pull requests are welcome, but please state the reason for it.

License

This project is under MIT License