Read windows registry python

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When python needs the mimetype for ". Given that an app will probably use only a handful of mimetypes but will use that same handful over and over, such a solution would have the benefits of a not using hardcoded values thus no ongoing maintenance , b performing slow stuff only on demand, c optimizing repeat calls, and d consuming zero startup time. Other committers may have opinions as well.

If you don't get an answer here in a reasonable amount of time, please post a discussion of the issue to python-dev it may end up there anyway. Reedy terry. I think it would help if either of you commented. I'll try to take a look at the patches. Basically I'm sympathetic to the problem which seems quite straightforwardly buggish but I want to take a look around the issue first. If there's a consensus that this is the appropriate change to be made, the patch still needs tests.

The results for 2. Likewise the results for an elevated prompt. The critical argument against the current Registry approach is that it returns unexpected or outright incorrect mimetypes for very standard extensions.

We have 3. This is Dave Chambers' patch from issue This eliminates any startup cost. I've produced three output files from a simple dump of the mimetypes database. For the purposes of taking this forward, we're really comparing the noregistry and the newregistry variants. One key issue is what to do when the same key occurs in both sets but with a different value. Examples include. And the other key issue is whether the overheads security, speed of using the registry outweigh its usefulness in any case.

Could I ask those who would remove the registry use altogether to comment on the newregistry output generating your own if it helps to see whether it changes your views at all. Either approach -- no-registry or new-registry -- feasible and the code churn is about equal. I'm unsure about compatibility issues: it's hard to see anyone relying on the incorrect mimetypes; but it's certainly possible to see someone relying on the additional correct mimetypes.

Apache comes with a mime. If an application wants to use the Windows registry settings instead, that's fine, but it should not be the default if there's a difference in output compared to the hard-coded list in mimetypes.

Note that this would probably require a redesign of the internals of the mimetypes module. It currently provides only a small subset as default mapping and then reads the full set from one of the mime. Such a redesign would only be possible for Python 3.

In most cases, noregistry gives the right mime type, and newregistry is wrong. However, in a few cases, the registry value is right i. However, I think that's a totally separate issue, and maybe we should probably open a bug to update a few of the hard-coded mappings in mimetypes. So maybe we should open another issue to fix the hard-coded types in mimetypes. I don't see that these add much value -- just a bunch of types that depend on the programs you have installed.

And in my mind at least, the behaviour of mimetypes. In short, "noregistry" gives more accurate results in most cases that matter, and I still strongly feel we should revert to that. QueryInfoKey with argument key. If this parameter is None or empty, the function retrieves the value set by the SetValue method for the key identified by key. Values in the registry have name, type, and data components.

An integer giving the registry type for this value see table in docs for SetValueEx. This file cannot already exist. If this filename includes an extension, it cannot be used on file allocation table FAT file systems by the LoadKey method. The caller of this method must possess the SeBackupPrivilege security privilege. Note that privileges are different than permissions — see the Conflicts Between User Rights and Permissions documentation for more details.

Use the SetValueEx function for support for other data types. Value lengths are limited by available memory. Long values more than bytes should be stored as files with the filenames stored in the configuration registry. This helps the registry perform efficiently. See Value Types for the available types. This method can also set additional value and type information for the specified key. To open the key, use the CreateKey or OpenKey methods.

Will generally raise NotImplementedError if executed on a bit operating system. If the key is not on the reflection list, the function succeeds but has no effect. Disabling reflection for a key does not affect reflection of any subkeys. DisableReflectionKey with argument key.

EnableReflectionKey with argument key. Returns True if reflection is disabled. QueryReflectionKey with argument key. Registry entries subordinate to this key define types or classes of documents and the properties associated with those types. Then we use SetValueEx to actually set the value and like all good programmers, we clean up when we're done and close the key.

If you skipped the CloseKey command, you'd be fine in this case as the script is done and Python will do it for you. However, if you continued working on this key, you might have an access violation since it's already open. Thus, the lesson is to always close a key when you finish editing it. The DeleteKey method is handy when you need to remove a key. DeleteValue is similar to DeleteKey, except that you delete just a value. Yes, it's pretty obvious. If you'd wanted to write your own recursive key deleting code, then you'd probably want to take a look at EnumKey and EnumValue as they enumerate keys and values respectively.

Let's take a quick look at how to use EnumKey:. QueryValueEx documentation, you need to pass an already open key. EnumKey returns a string, not an open key. Made a simple program to produce a list of the subkeys in the registry. I hope it helps, also feel free to critique it:. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Python code to read registry Ask Question. Asked 10 years, 10 months ago. Active 24 days ago. Viewed 74k times. Improve this question. Vinod K Vinod K 1, 10 10 gold badges 31 31 silver badges 44 44 bronze badges.