Traceback (most recent call last): File "E:\PycharmProjectFile\Python_shixun\test3.py", line 128, in <module> modify_book() File "E:\PycharmProjectFile\Python_shixun\test3.py", line 94, in modify_book reader = f.readlines(f) TypeError: argument should be integer or None, not '_io.TextIOWrapper'
时间: 2024-03-02 22:50:08 浏览: 155
这个错误是由于在调用 `readlines()` 方法时,传递了一个文件对象 `f` 作为参数,而 `readlines()` 方法的参数应该是一个整数或者 None,表示读取的最大字节数或者读取全部内容。因此,你需要将 `readlines(f)` 改为 `readlines()`,这样就可以读取文件的全部内容了。修改后的代码如下:
```
def modify_book():
book_name = input("请输入要修改的书籍名称:")
book_info = input("请输入新的书籍信息:")
with open("books.txt", "r", encoding="utf-8") as f:
books = f.readlines()
with open("books.txt", "w", encoding="utf-8") as f:
for book in books:
if book.startswith(book_name):
f.write(book_name + " " + book_info + "\n")
else:
f.write(book)
print("书籍信息修改成功!")
```
相关问题
Traceback (most recent call last): File "E:\PycharmProjectFile\Python_shixun\test2.py", line 46, in <module> add_bookType() File "E:\PycharmProjectFile\Python_shixun\test2.py", line 39, in add_bookType writer.writerow(Book_Type) _csv.Error: iterable expected, not type
这个错误提示意味着 `writerow()` 方法期望的是可迭代对象,而不是一个类型。你的 `Book_Type` 变量似乎是一个类型,而不是实际数据。
你可以尝试将 `Book_Type` 变量修改为一个包含单个元素的列表,例如:
```python
Book_Type = [book_type]
```
这样,`Book_Type` 就变成了一个可迭代对象,可以顺利地传递给 `writerow()` 方法。如果你仍然遇到问题,请检查你的代码,确保所有变量都已正确定义并传递给相关方法。
Traceback (most recent call last): File "C:\Users\Laowang\Desktop\Python机器学习基础教程\2.3.1.py", line 3, in <module> import mglearn.datasets File "E:\python_test\Lib\site-packages\mglearn\__init__.py", line 1, in <module> from . import plots File "E:\python_test\Lib\site-packages\mglearn\plots.py", line 5, in <module> from .plot_knn_regression import plot_knn_regression File "E:\python_test\Lib\site-packages\mglearn\plot_knn_regression.py", line 7, in <module> from .datasets import make_wave File "E:\python_test\Lib\site-packages\mglearn\datasets.py", line 5, in <module> from sklearn.datasets import load_boston File "E:\python_test\Lib\site-packages\sklearn\datasets\__init__.py", line 156, in __getattr__ raise ImportError(msg) ImportError: `load_boston` has been removed from scikit-learn since version 1.2.
这是一个错误信息,提示你在使用scikit-learn库的load_boston函数时出现问题。load_boston函数在Scikit-learn版本1.2之后已被移除,因此你需要升级Scikit-learn库或者使用其他函数来加载波士顿房价数据集。建议你查看Scikit-learn的文档或者相关教程,获取更多信息。
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