Licensing

Evaluate Aspose.Slides

You can download an evaluation version of Aspose.Slides for Python via .NET from its download page. The evaluation version provides the same features as the licensed product. The evaluation package is identical to the purchased package and becomes licensed after you add a few lines of code to apply the license.

When you’re satisfied with your evaluation of Aspose.Slides, you can purchase a license. We recommend reviewing the available subscription options. If you have questions, contact the Aspose sales team.

Every Aspose license includes a one-year subscription with free upgrades to new versions and fixes released during that period. Both licensed and evaluation users receive free, unlimited technical support.

Limitations of the Evaluation Version

While the Aspose.Slides evaluation version (when no license is applied) provides full functionality, it adds an evaluation watermark at the top of the document whenever you open or save it.
When extracting text from a presentation, you are limited to one slide.

To test Aspose.Slides without limitations, you can request a 30-day Temporary License. See the How to Get a Temporary License page for details.

Licensing in Aspose.Slides

An evaluation version becomes licensed after you purchase a license and add a couple of lines of code to apply it.
The license is a plain-text XML file that contains details such as the product name, the number of developers it covers, the subscription expiry date, and so on.
The license file is digitally signed, so you must not modify it. Even adding a single line break will invalidate it.
Aspose.Slides for Python via .NET typically looks for the license in these locations:
- An explicit path you provide
- The folder that contains the Python script that calls Aspose.Slides for Python via .NET
To avoid the evaluation limitations, set the license before using Aspose.Slides. You only need to set it once per application or process.

You may also want to review Metered Licensing.

Applying a License

A license can be loaded from a file, stream, or embedded resource.

Aspose.Slides provides the License class to handle licensing.

New licenses can activate Aspose.Slides only with version 21.4 or later. Earlier versions use a different licensing system and will not recognize these licenses.

File

The easiest way to set a license is to place the license file in the same folder as the component’s DLL and specify only the file name (without a path).

The following Python code shows how to set the license file:

import aspose.slides as slides

# Instantiates the License class. 
license = slides.License()

# Sets the license file path.
license.set_license("Aspose.Slides.lic")

If you place the license file in a different directory, when you call License.set_license(), the file name at the end of the explicit path must match your license file’s name.

For example, you can rename the license file to Aspose.Slides.lic.xml. Then, in your code, pass the full path to that file (ending with Aspose.Slides.lic.xml) to the License.set_license() method.

Stream

You can load a license from a stream. The following Python example shows how to apply a license from a stream:

import aspose.slides as slides

# Instantiates the License class.
license = slides.License()

# Set the license from a stream.
license.set_license(stream)

Validating a License

To verify that the license has been applied correctly, you can validate it. The following Python code demonstrates how to validate a license:

import aspose.slides as slides

license = slides.License()

license.set_license("Aspose.Slides.lic")

if license.is_licensed():
    print("License is good!")

Thread Safety

Note

The License.set_license methods are not thread-safe. If it needs to be called concurrently from multiple threads, use synchronization primitives (e.g., threading.Lock) to avoid issues.

Installation Metered Licensing