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gameparser.py

+import string
+
+# List of "unimportant" words (feel free to add more)
+skip_words = [
+    "a",
+    "about",
+    "all",
+    "an",
+    "another",
+    "any",
+    "around",
+    "at",
+    "bad",
+    "beautiful",
+    "been",
+    "better",
+    "big",
+    "can",
+    "every",
+    "for",
+    "from",
+    "good",
+    "have",
+    "her",
+    "here",
+    "hers",
+    "his",
+    "how",
+    "i",
+    "if",
+    "in",
+    "into",
+    "is",
+    "it",
+    "its",
+    "large",
+    "later",
+    "like",
+    "little",
+    "main",
+    "me",
+    "mine",
+    "more",
+    "my",
+    "now",
+    "of",
+    "off",
+    "oh",
+    "on",
+    "please",
+    "small",
+    "some",
+    "soon",
+    "that",
+    "the",
+    "then",
+    "this",
+    "those",
+    "through",
+    "till",
+    "to",
+    "towards",
+    "until",
+    "us",
+    "want",
+    "we",
+    "what",
+    "when",
+    "why",
+    "wish",
+    "with",
+    "would",
+]
+
+
+def filter_words(words, skip_words):
+    """This function takes a list of words and returns a copy of the list from
+    which all words provided in the list skip_words have been removed.
+    For example:
+
+    >>> filter_words(["help", "me", "please"], ["me", "please"])
+    ['help']
+
+    >>> filter_words(["go", "south"], skip_words)
+    ['go', 'south']
+
+    >>> filter_words(['how', 'about', 'i', 'go', 'through', 'that', 'little', 'passage', 'to', 'the', 'south'], skip_words)
+    ['go', 'passage', 'south']
+
+    """
+    for w in words[:]:
+        if w in skip_words:
+            words.remove(w)
+
+    return words
+
+
+def remove_punct(text):
+    """This function is used to remove all punctuation
+    marks from a string. Spaces do not count as punctuation and should
+    not be removed. The funcion takes a string and returns a new string
+    which does not contain any puctuation. For example:
+
+    >>> remove_punct("Hello, World!")
+    'Hello World'
+    >>> remove_punct("-- ...Hey! -- Yes?!...")
+    ' Hey  Yes'
+    >>> remove_punct(",go!So.?uTh")
+    'goSouTh'
+    """
+    no_punct = ""
+    for char in text:
+        if not (char in string.punctuation):
+            no_punct = no_punct + char
+
+    return no_punct
+
+
+def normalise_input(user_input):
+    """This function removes all punctuation from the string and converts it to
+    lower case. It then splits the string into a list of words (also removing
+    any extra spaces between words) and further removes all "unimportant"
+    words from the list of words using the filter_words() function. The
+    resulting list of "important" words is returned. For example:
+
+    >>> normalise_input("  Go   south! ")
+    ['go', 'south']
+    >>> normalise_input("!!!  tAkE,.    LAmp!?! ")
+    ['take', 'lamp']
+    >>> normalise_input("HELP!!!!!!!")
+    ['help']
+    >>> normalise_input("Now, drop the sword please.")
+    ['drop', 'sword']
+    >>> normalise_input("Kill ~ tHe :-  gObLiN,. wiTH my SWORD!!!")
+    ['kill', 'goblin', 'sword']
+    >>> normalise_input("I would like to drop my laptop here.")
+    ['drop', 'laptop']
+    >>> normalise_input("I wish to take this large gem now!")
+    ['take', 'gem']
+    >>> normalise_input("How about I go through that little passage to the south...")
+    ['go', 'passage', 'south']
+
+    """
+    # Remove punctuation and convert to lower case
+    no_punct = remove_punct(user_input).lower()
+    # Convert the string of words into a list of words
+    word_list = no_punct.split()
+    # Remove the words in the skip_words list
+    filtered_list = filter_words(word_list, skip_words)
+
+    return filtered_list