"""
Addressing and decomposing SMI table cells
++++++++++++++++++++++++++++++++++++++++++

Load a MIB, enumerate a conceptual row's columns, construct a cell OID from
symbolic names and typed indices, then decompose it back into those parts.
No SNMP engine or network connection is required.
"""  #

from pysnmp.smi import builder, view

mibBuilder = builder.MibBuilder()
mibBuilder.loadModules("SNMPv2-MIB")
mibView = view.MibViewController(mibBuilder)

print("sysORTable columns:")
for columnId, columnOid, columnNode in mibView.get_table_columns(
    "SNMPv2-MIB", "sysOREntry"
):
    print(
        columnId, ".".join(str(part) for part in columnOid), columnNode.getMaxAccess()
    )

cellOid = mibView.resolve_cell_oid("SNMPv2-MIB", "sysOREntry", "sysORID", 7)
print("Cell OID:", ".".join(str(part) for part in cellOid))

moduleName, rowName, columnName, indices = mibView.get_table_cell_info(cellOid)
print("Cell name:", f"{moduleName}::{rowName}::{columnName}")
print("Indices:", ", ".join(index.prettyPrint() for index in indices))