【Python】文字列の先頭と末尾にあるスペース、空白文字を削除する

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def remove_tail_sapces(word : str, spaces : list = [" ", "　"]) -> str:
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    word_removed_space = ""
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    if len(word) == 0:
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        word_removed_space = word
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    elif word[len(word) - 1] in spaces:
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        word_removed_space = word[0:len(word) - 1]
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        print("'{}'".format(word_removed_space[0:len(word) - 1]))
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        word_removed_space = remove_tail_sapces(word_removed_space, spaces)
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    else:
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        word_removed_space = word
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    return word_removed_space
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def remove_head_sapces(word : str, spaces : list = [" ", "　"]) -> str:
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    word_removed_space = ""
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    if len(word) == 0:
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        word_removed_space = word
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    elif word[0] in spaces:
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        word_removed_space = word[1:len(word)+1]
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        # invisible head character if head space is nothing
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        print("'{}'".format(word_removed_space[1:len(word)]))
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        word_removed_space = remove_head_sapces(word_removed_space, spaces)
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    else:
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        word_removed_space = word
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    return word_removed_space
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def remove_spaces_at_head_and_tail(word : str, spaces : list = [" ", "　"]) -> str:
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    word_tail_removed = remove_tail_sapces(word, spaces)
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    word_both_removed = remove_head_sapces(word_tail_removed, spaces)
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    return word_both_removed
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keyword  = "   　　　　　　　      　　   node.js    　　　　　  　　　　  "
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actual = remove_spaces_at_head_and_tail(keyword, [" ", "　"])
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print(actual)