def word_search(doc_list, keyword):
    """
    Takes a list of documents (each document is a string) and a keyword.
    Returns list of the index values into the original list for all documents
    containing the keyword.

    Example:
    doc_list = ["The Learn Python Challenge Casino.", "They bought a car", "Casinoville"]
    >>> word_search(doc_list, 'casino')
    >>> [0]
    """
    indices = []
    for i, doc in enumerate(doc_list):
        tokens = doc.split()
        normalized = [token.rstrip('.,').lower() for token in tokens]
        if keyword.lower() in normalized:
            indices.append(i)
    return indices
    """  if we didn't remove . and , the result could be different
    lowerKey = keyword.lower()
    result = []
    for i in range(len(doc_list)):
        EachWords = doc_list[i].lower().split()        
        for eachword in EachWords:
            #print lowerKey
            if lowerKey in eachword: 
                result.append(i)
    return result 
    """
doc_list = ["The Learn Python Challenge Casino.", "They bought a car", "Casinoville"]
print(word_search(doc_list, 'casino'))