I have a doc.docx file at '/var/code/oa'. I need to read it use python-docx. 
I write this: 

```
from docx import Document
document = Document('/var/code/oa/doc.docx')

```

then, have error.. 
PackageNotFoundError: Package not found at '/var/code/oa/doc.docx'

why?

Thanks @soon. 
Uh, It's stupid. the reason is the file, it's must be `docx` file. 
I just change the file name from `doc` to `docx`, it's not a really `docx` file.