Change named value in XMP metadata of EPS|Python

In order to change named value in XMP metadata of EPS file you will need to take several steps:

1. Initialize an input stream for the input EPS file.
2. Create an instance of PsDocument from the previously created input stream.
3. Get an instance of XmpMetadata from the PsDocument. If the EPS file doesn’t contain XMP metadata, a new one will be created and populated with values from PS metadata comments, then returned to you.
4. Now you can change the named value of structure metadata fileds.
5. Initialize an output stream for the output EPS file.
6. Save EPS file with new XMP metadata.

Here is a code snippet that shows how to change named value in XMP metadata in EPS file in Python:

# The path to the documents directory.
data_dir = Util.get_data_dir_working_with_xmp_metadata_in_eps()
# Initialize a EPS file input stream
ps_stream = open(data_dir + "add_named_value_input.eps", "rb",)
# Create a PsDocument instance from the stream
document = PsDocument(ps_stream)

try:
    # Get XMP metadata. If the EPS file doesn't contain XMP metadata we get a new one filled with values from PS metadata comments (%%Creator, %%CreateDate, %%Title etc)
    xmp = document.get_xmp_metadata()
    
    #Change the XMP metadata values
    
    # Change the named value "stDim:unit" in "xmpTPg:MaxPageSize" structure.
    xmp.set_named_value("xmpTPg:MaxPageSize", "stDim:unit", XmpValue("Inches"))
    
    # Add the named value "stDim:newKey" in "xmpTPg:MaxPageSize" structure.
    xmp.set_named_value("xmpTPg:MaxPageSize", "stDim:newKey", XmpValue("NewValue"))
    
    # Save the EPS file with changed XMP metadata
    
    # Create an ouput stream
    with open(data_dir + "change_named_value_output.eps", "wb") as out_ps_stream:
        # Save EPS file
        document.save(out_ps_stream)
    
finally:
    ps_stream.close()

See changing named value in XMP metadata in .NET, Java and C++.

You can download examples and data files from GitHub.