added test_file

palindrome.py

@@ -0,0 +1,66 @@
+import re
+
+
+# Functions
+# Prints string_
+def print_string(string_):
+    print("Current string: {}".format(string_))
+
+# Takes a string and returns True if the string is a palindrome.
+def palindrome_check_recursive(string_):
+    print_string(string_)
+    if len(string_) < 2:
+        return True
+    if string_.endswith(string_[0]):
+        return palindrome_check_recursive(string_[1:-1])
+    return False
+
+# Takes a string and returns all of the letters in lower case.
+def reformat(string_):
+    string_ = re.sub(r'[^A-Za-z]','',string_)
+    print_string(string_)
+    string_ = string_.lower()
+    print_string(string_)
+    return string_
+
+# Takes a string and returns True if the string is a palindrome.
+def palindrome_check(string_):
+    print_string(string_[::-1])
+    return string_ == string_[::-1]
+
+# Takes a string and returns True if the string is a palindrome.
+def palindrome_check_iterative(string_):
+    for index, letter in enumerate(string_[::-1]):
+        if letter == string_[index]:
+            continue
+        return False
+    return True
+
+# Main program.
+# Get user input.
+potential_palindrome_input = input("Enter a string > ")
+print_string(potential_palindrome_input)
+
+if not potential_palindrome_input:
+    print ("You didn't enter anything.")
+    exit()
+
+# Remove spaces, punctuation, and capitalization from the input
+potential_palindrome = reformat(potential_palindrome_input)
+
+# Algorithms
+is_a_palindrome_recursive = palindrome_check_recursive(potential_palindrome)
+is_a_palindrome = palindrome_check(potential_palindrome)
+is_a_palindrome_iterative = palindrome_check_iterative(potential_palindrome)
+
+# Results
+if (is_a_palindrome and
+    is_a_palindrome_iterative and
+    is_a_palindrome_recursive):
+    print("{} is a palindrome.".format(potential_palindrome_input))
+elif (not is_a_palindrome and
+    not is_a_palindrome_iterative and
+    not is_a_palindrome_recursive):
+    print("{} is not a palindrome.".format(potential_palindrome_input))
+else:
+    print("Had an inconsistent answer.")

test.sh

@@ -2,7 +2,7 @@
 
 describe "palindrome.py: Determines if a text is palindromic"
 
-prog="python palindrome.py"
+prog="python3 palindrome.py"
 
 it_works_for_even_numbers() {
   out="$(echo 'toot' | $prog)"