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  1. str_l = ["aaa。bbb。", "aaa。", "aaa", "。"]
  2.  
  3. for str1 in str_l:
  4. lst = str1.split(r"。")
  5. nr = len(lst)
  6. print(f"'{str1}' -> {nr == 1 or nr == 2 and lst[1] == ''}")
Success #stdin #stdout 0.03s 9072KB
stdin
Standard input is empty
stdout
'aaa。bbb。' -> False
'aaa。' -> True
'aaa' -> True
'。' -> True