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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def construct_name_filter(pattern):
 """Return a function for filtering sensor names based on a pattern. Parameters pattern : None or str If None, the returned function matches all names. If pattern starts and ends with '/' the text between the slashes is used as a regular expression to search the names. Otherwise the pattern must match the name of the sensor exactly. Returns ------- exact : bool Return True if pattern is expected to match exactly. Used to determine whether having no matching sensors constitutes an error. filter_func : f(str) -> bool Function for determining whether a name matches the pattern. """

    if pattern is None:
        return False, lambda name: True
    if pattern.startswith('/') and pattern.endswith('/'):
        name_re = re.compile(pattern[1:-1])
        return False, lambda name: name_re.search(name) is not None
    return True, lambda name: name == pattern