4 examples of 'python list unique' in Python

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def unique1(lst):
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    outputList = []
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    for el in lst:
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        if el not in outputList:
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            outputList.append(el)
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    print(outputList)

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def unique2(lst):
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    myset=set(lst)
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    print(list(myset))

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def is_unique_list(seq):
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    for i in seq:
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        if seq.count(i) != 1:
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            return False
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    return True

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def unique(list1):
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    # init a null list
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    unique_list = []
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    # traverse for all elements
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    for x in list1:
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        # check if exists in unique_list or not
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        if x not in unique_list:
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            unique_list.append(x)
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    return unique_list