Create hangmanproject_unit6.py

Author: lironmiz

hangmanproject_unit6.py

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+# hangman project - unit six part 1 exercise.
+# author - lirom mizrahi
+'''
+To remind you, in the unfolding task at the end of the previous unit, you wrote a function to check the correctness 
+of input from the user. In this exercise, you will upgrade the function so that it also refers to the letters that
+the player has already guessed in the game in the tests.
+
+Write the function, this time call it check_valid_input, and define it as follows:
+
+def check_valid_input(letter_guessed, old_letters_guessed):
+Acceptance values of the function:
+A string called letter_guessed. The string represents the character received from the player.
+A list called old_letters_guessed. The list contains the letters the player has guessed so far.
+The return values of the function
+The function returns a Boolean value representing the correctness of the string and whether the user has already guessed the character before.
+
+The function returns false (False, an invalid string) in the following cases:
+If the letter_guessed string consists of two or more characters
+If the string letter_guessed contains a sign that is not an English letter (like: &, *)
+If the letter_guessed string is a character already in the old_letters_guessed list (that is, this character has
+been guessed before and therefore it is illegal to guess it again)
+The function returns true (True, a valid character) if the string letter_guessed consists of only one letter
+that is an English letter (and not another sign) that is not in the list old_letters_guessed
+
+Examples of running the check_valid_input function
+
+>>> old_letters = ['a', 'b', 'c']
+>>> check_valid_input('C', old_letters)
+False
+>>> check_valid_input('ep', old_letters)
+False
+>>> check_valid_input('$', old_letters)
+False
+>>> check_valid_input('s', old_letters)
+True
+
+'''
+
+
+def error_check(user_note):
+    if len(user_note) > 1:
+        if user_note.isalpha():
+            return "E1"
+        else:
+            return "E3"
+    elif len(user_note) == 1 and user_note.isalpha() != True:
+        return "E2"
+    else:
+        return user_note.lower()
+
+
+def check_valid_input(letter_guessed, old_letters_guessed):
+    if letter_guessed == "E1" or letter_guessed == "E3" or letter_guessed == "E2":
+        return False
+    else:
+        if letter_guessed not in old_letters_guessed:
+            old_letters_guessed = old_letters_guessed.append(letter_guessed)
+            return True
+        else:
+            return False
+
+
+def main():
+    guess_a_letter = input("Guess a letter:")
+    letter_guessed = error_check(guess_a_letter)
+    check_valid = check_valid_input(letter_guessed, old_letters_guessed=['a', 'b', 'c'])
+    print(check_valid)
+
+if __name__ == "__main__":
+    main()