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TextFSM

TextFSM is used to parse semi-formated data.

Example of TextFSM Template:

# Chassis value will be null for single chassis routers.
Value Filldown Chassis (.cc.?-re.)
Value Required Slot (\d+)
Value State (\w+)
Value Temp (\d+)
Value CPUTemp (\d+)
Value DRAM (\d+)
Value Model (\S+)

# Always starts in 'Start' state.
Start
  ^${Chassis}
  # Record current values and change state.
  # No record will be output on first pass as 'Slot' is 'Required' but empty.
  ^Routing Engine status: -> Record RESlot

# A state transition was not strictly necessary but helpful for the example.
RESlot
  ^\s+Slot\s+${Slot}
  ^\s+Current state\s+${State}
  ^\s+Temperature\s+${Temp} degrees
  ^\s+CPU temperature\s+${CPUTemp} degrees
  ^\s+DRAM\s+${DRAM} MB
  # Transition back to Start state.
  ^\s+Model\s+${Model} -> Start

# An implicit EOF state outputs the last record.

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