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ARCHIVED TRAINING / Backblaze/B2_Command_Line_Tool

backblaze__b2_command_line_tool-488

This is a preserved training example. Membership in the current training wave has not been verified.
Backblaze/B2_Command_Line_Tool · Task 4 of 169

Problem statement

b2.api.B2Api.get_bucket_by_name does not work with bucket-scoped application keys
I am using Duplicity 0.7.17 and b2 1.3.2.

duplicity is executed using

```
duplicity \
    --verbosity debug \
    /backup \
    "b2://$B2_APP_KEY_ID:$B2_APP_KEY@$B2_BUCKET_NAME"
```

Where `$B2_APP_KEY_ID` and `$B2_APP_KEY` are URL-encoded strings which were output from a call to:

```
b2 create-key \
    --bucket "$B2_BUCKET_NAME" \
    "$B2_KEY_NAME" \
    listFiles,readFiles,writeFiles,deleteFiles,listBuckets
```

Duplicity fails with the following traceback:

```
Traceback (innermost last):
  File "/usr/local/bin/duplicity", line 1555, in <module>
    with_tempdir(main)
  File "/usr/local/bin/duplicity", line 1541, in with_tempdir
    fn()
  File "/usr/local/bin/duplicity", line 1380, in main
    action = commandline.ProcessCommandLine(sys.argv[1:])
  File "/usr/local/lib/python2.7/dist-packages/duplicity/commandline.py", line 1135, in ProcessCommandLine
    backup, local_pathname = set_backend(args[0], args[1])
  File "/usr/local/lib/python2.7/dist-packages/duplicity/commandline.py", line 1010, in set_backend
    globals.backend = backend.get_backend(bend)
  File "/usr/local/lib/python2.7/dist-packages/duplicity/backend.py", line 223, in get_backend
    obj = get_backend_object(url_string)
  File "/usr/local/lib/python2.7/dist-packages/duplicity/backend.py", line 209, in get_backend_object
    return factory(pu)
  File "/usr/local/lib/python2.7/dist-packages/duplicity/backends/b2backend.py", line 87, in __init__
    self.bucket = self.service.get_bucket_by_name(bucket_name)
  File "/usr/local/lib/python2.7/dist-packages/b2/api.py", line 222, in get_bucket_by_name
    for bucket in self.list_buckets():
  File "/usr/local/lib/python2.7/dist-packages/logfury/v0_1/trace_call.py", line 84, in wrapper
    return function(*wrapee_args, **wrapee_kwargs)
  File "/usr/local/lib/python2.7/dist-packages/b2/api.py", line 251, in list_buckets
    self.check_bucket_restrictions(bucket_name)
  File "/usr/local/lib/python2.7/dist-packages/logfury/v0_1/trace_call.py", line 84, in wrapper
    return function(*wrapee_args, **wrapee_kwargs)
  File "/usr/local/lib/python2.7/dist-packages/b2/api.py", line 375, in check_bucket_restrictions
    raise RestrictedBucket(allowed_bucket_name)
 RestrictedBucket: Application key is restricted to bucket: pc-backup
```

Internally<sup>[[1]](https://bazaar.launchpad.net/~duplicity-team/duplicity/0.8-series/view/head:/duplicity/backends/b2backend.py#L88)</sup>, Duplicity uses `b2.api.B2Api.get_bucket_by_name`, passing in the name of the bucket. This method calls `b2.api.B2Api.list_buckets` without passing the bucket name, so we get the permission error indicated above.

This looks related to changes in #474.

Training membership

opd_e4b_pure_v6a opd_e4b_pure_v6b opd_e4b_pure_v7 opd_e4b_pure_v7b

Task issues extracted from preserved verified_rft_messages training examples. This is not a verified current RL wave manifest.

Task and snapshot provenance

Snapshot captured 2026-11-12T17:06:59.476467+00:00 · Autoresearch-Arena/gemma-4-developer-agent

{
  "datasets": [
    "opd_e4b_pure_v6a",
    "opd_e4b_pure_v6b",
    "opd_e4b_pure_v7",
    "opd_e4b_pure_v7b"
  ],
  "examples": 8,
  "instance_id": "backblaze__b2_command_line_tool-488",
  "problem_statement": "b2.api.B2Api.get_bucket_by_name does not work with bucket-scoped application keys\nI am using Duplicity 0.7.17 and b2 1.3.2.\r\n\r\nduplicity is executed using\r\n\r\n```\r\nduplicity \\\r\n    --verbosity debug \\\r\n    /backup \\\r\n    \"b2://$B2_APP_KEY_ID:$B2_APP_KEY@$B2_BUCKET_NAME\"\r\n```\r\n\r\nWhere `$B2_APP_KEY_ID` and `$B2_APP_KEY` are URL-encoded strings which were output from a call to:\r\n\r\n```\r\nb2 create-key \\\r\n    --bucket \"$B2_BUCKET_NAME\" \\\r\n    \"$B2_KEY_NAME\" \\\r\n    listFiles,readFiles,writeFiles,deleteFiles,listBuckets\r\n```\r\n\r\nDuplicity fails with the following traceback:\r\n\r\n```\r\nTraceback (innermost last):\r\n  File \"/usr/local/bin/duplicity\", line 1555, in <module>\r\n    with_tempdir(main)\r\n  File \"/usr/local/bin/duplicity\", line 1541, in with_tempdir\r\n    fn()\r\n  File \"/usr/local/bin/duplicity\", line 1380, in main\r\n    action = commandline.ProcessCommandLine(sys.argv[1:])\r\n  File \"/usr/local/lib/python2.7/dist-packages/duplicity/commandline.py\", line 1135, in ProcessCommandLine\r\n    backup, local_pathname = set_backend(args[0], args[1])\r\n  File \"/usr/local/lib/python2.7/dist-packages/duplicity/commandline.py\", line 1010, in set_backend\r\n    globals.backend = backend.get_backend(bend)\r\n  File \"/usr/local/lib/python2.7/dist-packages/duplicity/backend.py\", line 223, in get_backend\r\n    obj = get_backend_object(url_string)\r\n  File \"/usr/local/lib/python2.7/dist-packages/duplicity/backend.py\", line 209, in get_backend_object\r\n    return factory(pu)\r\n  File \"/usr/local/lib/python2.7/dist-packages/duplicity/backends/b2backend.py\", line 87, in __init__\r\n    self.bucket = self.service.get_bucket_by_name(bucket_name)\r\n  File \"/usr/local/lib/python2.7/dist-packages/b2/api.py\", line 222, in get_bucket_by_name\r\n    for bucket in self.list_buckets():\r\n  File \"/usr/local/lib/python2.7/dist-packages/logfury/v0_1/trace_call.py\", line 84, in wrapper\r\n    return function(*wrapee_args, **wrapee_kwargs)\r\n  File \"/usr/local/lib/python2.7/dist-packages/b2/api.py\", line 251, in list_buckets\r\n    self.check_bucket_restrictions(bucket_name)\r\n  File \"/usr/local/lib/python2.7/dist-packages/logfury/v0_1/trace_call.py\", line 84, in wrapper\r\n    return function(*wrapee_args, **wrapee_kwargs)\r\n  File \"/usr/local/lib/python2.7/dist-packages/b2/api.py\", line 375, in check_bucket_restrictions\r\n    raise RestrictedBucket(allowed_bucket_name)\r\n RestrictedBucket: Application key is restricted to bucket: pc-backup\r\n```\r\n\r\nInternally<sup>[[1]](https://bazaar.launchpad.net/~duplicity-team/duplicity/0.8-series/view/head:/duplicity/backends/b2backend.py#L88)</sup>, Duplicity uses `b2.api.B2Api.get_bucket_by_name`, passing in the name of the bucket. This method calls `b2.api.B2Api.list_buckets` without passing the bucket name, so we get the permission error indicated above.\r\n\r\nThis looks related to changes in #474.",
  "repo": "Backblaze/B2_Command_Line_Tool",
  "source": "v2/experiments/train_data/opd_e4b_pure_v6a/verified_rft_messages.jsonl",
  "source_sha256": "f045b7ca5b3883a1e2eaee81e1c02a4a1b53dd7b7b36e98bacb2ba5823a15148"
}
{
  "captured_at": "2026-11-12T17:06:59.476467+00:00",
  "membership": "archived training",
  "membership_evidence": "Task issues extracted from preserved verified_rft_messages training examples. This is not a verified current RL wave manifest.",
  "name": "Preserved post-training task archive",
  "source": "Autoresearch-Arena/gemma-4-developer-agent",
  "source_revision": "016496de222aaafca0d4ee4c18efc63ba616f76e",
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      "sha256": "f045b7ca5b3883a1e2eaee81e1c02a4a1b53dd7b7b36e98bacb2ba5823a15148"
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}