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| def bool_str(str_): | |
| list_ = list(str_) | |
| tmp_list = [] | |
| if list_ and list_[0] != ']' and list_[-1] != '[': | |
| for item in list_: | |
| if item == '[': | |
| tmp_list.append(item) | |
| elif item == ']' and tmp_list[-1] == '[': | |
| tmp_list.pop() | |
| if not tmp_list: | |
| return True | |
| return False |
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