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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 resolve_path(path):
 """Resolves path and converts it into an absolute path."""

    if path[0] == '~':
        # ~ or ~user
        path = os.path.expanduser(path)
    if path[0] != '/':
        # Relative path
        if cur_dir[-1] == '/':
            path = cur_dir + path
        else:
            path = cur_dir + '/' + path
    comps = path.split('/')
    new_comps = []
    for comp in comps:
        # We strip out xxx/./xxx and xxx//xxx, except that we want to keep the
        # leading / for absolute paths. This also removes the trailing slash
        # that autocompletion adds to a directory.
        if comp == '.' or (comp == '' and len(new_comps) > 0):
            continue
        if comp == '..':
            if len(new_comps) > 1:
                new_comps.pop()
        else:
            new_comps.append(comp)
    if len(new_comps) == 1 and new_comps[0] == '':
        return '/'
    return '/'.join(new_comps)