How can i automate the join and export process using arcpy?

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I want to compare two layers(for example layer A and B) with two fields using arcpy and export the records that are not in layer B but located in layer A. without arcpy i always join the layers and then select the records:

1. join layer A with layer B
2. select all records in layer A
3. remove join
4. switch selection
5. export the selected records.

in the process i use join,select all,switch select and export selected records.But i don't know how can i use arcpy to export the records ? Is that any good solution to automate the process using arcpy? I want to use the code with stand alone script.Thanks.



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