def cutB(sentence,dictB):
result = []
sentenceLen = len(sentence)
maxDictB = max([len(word) for word in dictB])
while sentenceLen > 0:
word = ''
for i in range(maxDictB, 0, -1):
piece = sentence[sentenceLen - i:sentenceLen]
if piece in dictB:
word = piece
result.append(word)
sentenceLen -= i
break
if word is '':
sentenceLen -= 1
result.append(sentence[sentenceLen])
print(result[::-1],end="")
<>:14: SyntaxWarning: “is” with a literal. Did you mean “==”?
<>:14: SyntaxWarning: “is” with a literal. Did you mean “==”?
C:\Users\41588\AppData\Local\Temp\ipykernel_4896\1394694574.py:14: SyntaxWarning: “is” with a literal. Did you mean “==”?
if word is ”:
Python错误“SyntaxWarning: “is“ with a literal. Did you mean “==“?”
Python 3.8（或更高）下：
出现报错：
SyntaxWarning: “is” with a literal. Did you mean “==”?
解决方法：
将对应语句中is/is not用== 和 != 代替
原因：从 python 3.8 开始，使用 is 和 is not 运算符时，会抛出 SyntaxWarning 语句警告信息
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