问使用notebook找不到文件报错，该怎么解决？

def load_stop_words(file = "stopwords.txt"):

    with open(file,"r",encoding = "utf-8") as f:

        return f.read().split("\n")

​

def cut_words(file="数学原始数据.csv"):

    stop_words = load_stop_words()

    result = []

    all_data = pd.read_csv(file,encoding = "gbk",names=["data"])["data"]

    for words in all_data:

        c_words = jieba.lcut(words)

        result.append([word for word in c_words if word not in stop_words])

    return result

FileNotFoundError                         Traceback (most recent call last)
/tmp/ipykernel_33/3022115533.py in <module>
     42 
     43 if __name__ == "__main__":
---> 44     data = cut_words()
     45     word_2_index, index_2_word, word_2_onehot = get_dict(data)
     46 

/tmp/ipykernel_33/3022115533.py in cut_words(file)
     11 
     12 def cut_words(file="数学原始数据.csv"):
---> 13     stop_words = load_stop_words()
     14     result = []
     15     all_data = pd.read_csv(file,encoding = "gbk",names=["data"])["data"]

/tmp/ipykernel_33/3022115533.py in load_stop_words(file)
      7 
      8 def load_stop_words(file = "stopwords.txt"):
----> 9     with open(file,"r",encoding = "utf-8") as f:
     10         return f.read().split("\n")
     11 

FileNotFoundError: [Errno 2] No such file or directory: 'stopwords.txt'