Public bug reported: Hi, I have been trying to 'override' the file open parameters in the MP3 module to improve scan performance of a large music library, using python3-mutagen.
I can't get the supplied example to work: I get the following output: $ python3 fileobj-gio.py Traceback (most recent call last): File "fileobj-gio.py", line 130, in <module> print(mutagen.File(mutagen_file).pprint()) File "/usr/lib/python3/dist-packages/mutagen/_file.py", line 239, in File with open(filename, "rb") as fileobj: TypeError: invalid file: <__main__.GioMutagenFile object at 0x7f204fba4be0> Looking through the code I can't see how it would treat a 'file-like object' any differently: it seems that open(filename,"rb") will always be called. What I want to achieve is to understand if different buffering would improve elapsed time to scan large numbers of files. I was hoping to open the file first using different buffering parameter and pass a file- object to MP3, but the only documented way of doing this using open() is by passing the fileno() attribute of an already open file, which also fails on the open statement: m=MP3(f.fileno()) Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/lib/python3/dist-packages/mutagen/_file.py", line 42, in __init__ self.load(filename, *args, **kwargs) File "/usr/lib/python3/dist-packages/mutagen/id3/__init__.py", line 1092, in load with open(filename, "rb") as fileobj: OSError: [Errno 9] Bad file descriptor Any advice would be most welcome on either how to fix the bug or other ways to improve scan performance. Thanks for your help. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: python3-mutagen 1.31-1ubuntu1 ProcVersionSignature: Ubuntu 4.4.0-38.57-generic 4.4.19 Uname: Linux 4.4.0-38-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 CurrentDesktop: Unity Date: Fri Sep 30 00:03:20 2016 Dependencies: PackageArchitecture: all SourcePackage: mutagen UpgradeStatus: Upgraded to xenial on 2016-04-22 (160 days ago) ** Affects: mutagen (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug xenial -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1629131 Title: Unable to use 'filething' to open files in mutagen.mp3.MP3 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutagen/+bug/1629131/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs