Prompt Title: Map SQLAlchemy models efficiently.

Sure! Here's an example Python script that decodes an ISO 8583 message using the Py8583 library:

pythonCopy code
from py8583 import ISO8583
from py8583.specs import default as spec

message_hex = '08002000000000800000000000000000F0000000020190323193714'
iso = ISO8583(spec)
iso.setMTI('0800')
iso.unpack(message_hex)

print(f"Primary Bitmap: {iso.getBitmap()}")
print(f"Field 3: {iso.getField(3)}")

In this example, we start by importing the ISO8583 class from the py8583 library and the default ISO 8583 specification from py8583.specs. We then define a hex string message_hex that represents an ISO 8583 message.

We create an instance of the ISO8583 class and set the message type indicator (MTI) to '0800' using the setMTI method. We then unpack the ISO 8583 message using the unpack method, which parses the message and populates the ISO8583 instance with the field values.

Finally, we print the value of the primary bitmap using the getBitmap method and the value of field 3 using the getField method.

Note that the py8583 library provides a number of methods and properties for accessing and manipulating ISO 8583 fields. You can refer to the library documentation for more details on how to use it.