上面的代码一直报AttributeError: 'PdfFileReader' object has no attribute 'getEncryption'. Did you mean: 'getIsEncrypted'?

这个错误信息表明你正在尝试在`PdfFileReader`对象上访问一个不存在的属性`getEncryption`。`PdfFileReader`是Python中的一个类，通常来自于`PyPDF2`这个库，用于处理PDF文件。如果出现这个错误，说明你可能记错了属性名或者是库的文档没有正确查阅。

正确的属性名应该是`getIsEncrypted`，它用于检测PDF文件是否被加密。如果返回值为`True`，则表示PDF文件是加密的；如果为`False`，则表示文件未加密。

你需要将代码中的`getEncryption`改为`getIsEncrypted`。下面是一个修改后的代码示例：

from PyPDF2 import PdfFileReader

with open('example.pdf', 'rb') as f:
    reader = PdfFileReader(f)
    if reader.getIsEncrypted():
        print("文件是加密的。")
    else:
        print("文件未加密。")

确保你已经安装了`PyPDF2`库，否则需要先通过`pip install PyPDF2`命令安装它。

相关问题

AttributeError: DataFrame object has no attribute append . Did you mean: _append ?

This error occurs when you try to call the `append` method on a Pandas DataFrame object, but the object does not have an `append` attribute.

One possible reason for this error is that you are trying to append a DataFrame to another DataFrame using the `append` method, but you are not using it correctly. In Pandas, the `append` method does not modify the original DataFrame, but instead it returns a new DataFrame that contains the rows from both DataFrames. Therefore, you need to assign the result of the `append` method to a new variable or to the original DataFrame, like this:

df1 = pd.DataFrame({'A': [1, 2], 'B': [3, 4]})
df2 = pd.DataFrame({'A': [5, 6], 'B': [7, 8]})
df3 = df1.append(df2)

In this example, `df3` will contain the rows from both `df1` and `df2`.

If you are still getting the AttributeError, it's possible that the DataFrame object you are trying to append to does not have an `append` attribute. In this case, you can try using the `_append` attribute instead, which is a private method that is used internally by Pandas. However, be aware that using private methods may not be supported in future versions of Pandas and may cause unexpected behavior.

df1._append(df2)

上面代码报错 ：AttributeError: type object 'QJsonParseError' has no attribute 'NoError'. Did you mean: 'error'?

这个错误可能是因为QJsonParseError没有NoError属性，如果您想检查QJsonDocument是否成功解析，可以尝试使用error()方法，如下所示：

json_doc = QJsonDocument.fromJson(json_bytes)
if json_doc.isNull():
    json_error = json_doc.error()
    print(json_error.errorString())
else:
    # 解析成功后的操作
    ...

这里的error()方法会返回一个QJsonParseError对象，您可以通过调用其errorString()方法获取错误信息。