def get_borrow_statistics_by_department(department):这段代码为什么错了
借书人所在单位或部门统计该单位或部门的借书情况：
def get_borrow_statistics_by_department(department):
"""
统计某个部门或单位的借书情况
:param department: 部门或单位名称
:return: 统计结果，dict格式
"""
borrower_df = pd.read_csv("borrowers.csv")
borrower_df["department"] = borrower_df["student_id"].apply(lambda x: x[:4])
department_borrowers = borrower_df[borrower_df["department"] == department]
borrow_records = []
for _, borrower in department_borrowers.iterrows():
borrow_records += eval(borrower["borrow_records"])
borrow_books = {}
for record in borrow_records:
book_id = record["book_id"]
if book_id in borrow_books:
borrow_books[book_id] += 1
else:
borrow_books[book_id] = 1
book_df = pd.read_csv("books.csv")
department_books = book_df[book_df["book_id"].isin(list(borrow_books.keys()))]
result = {}
for _, book in department_books.iterrows():
book_id = book["book_id"]
result[book["book_name"]] = borrow_books[book_id]
return result
信息再提供多一点，这个函数是某个类中的函数吗？就这一行来说，没啥问题，但在上下文关系中，可能有问题，比如对齐不正确等等
参考GPT和自己的思路：
很抱歉，问题描述得比较简洁，无法判断代码具体的错误。但是，根据代码的命名可以猜测这个函数是用来获取某个部门的借阅统计信息的。如果代码出错了，可能是语法错误或者逻辑错误。
如果你能提供更具体的错误信息或者代码片段，我可以更准确地帮助你解决问题。
可以把代码全部列出来吗？这段代码无法判断错误