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59 lines
1.9 KiB
59 lines
1.9 KiB
## LogReader
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Route is a class for conveniently accessing all the [logs](/system/loggerd/) from your routes. The LogReader class reads the non-video logs, i.e. rlog.bz2 and qlog.bz2. There's also a matching FrameReader class for reading the videos.
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```python
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from openpilot.tools.lib.route import Route
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from openpilot.tools.lib.logreader import LogReader
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r = Route("a2a0ccea32023010|2023-07-27--13-01-19")
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# get a list of paths for the route's rlog files
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print(r.log_paths())
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# and road camera (fcamera.hevc) files
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print(r.camera_paths())
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# setup a LogReader to read the route's first rlog
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lr = LogReader(r.log_paths()[0])
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# print out all the messages in the log
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import codecs
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codecs.register_error("strict", codecs.backslashreplace_errors)
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for msg in lr:
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print(msg)
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# setup a LogReader for the route's second qlog
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lr = LogReader(r.log_paths()[1])
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# print all the steering angles values from the log
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for msg in lr:
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if msg.which() == "carState":
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print(msg.carState.steeringAngleDeg)
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```
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### Segment Ranges
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We also support a new format called a "segment range":
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```
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344c5c15b34f2d8a / 2024-01-03--09-37-12 / 2:6 / q
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[ dongle id ] [ timestamp ] [ selector ] [ query type]
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```
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you can specify which segments from a route to load
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```python
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lr = LogReader("a2a0ccea32023010|2023-07-27--13-01-19/4") # 4th segment
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lr = LogReader("a2a0ccea32023010|2023-07-27--13-01-19/4:6") # 4th and 5th segment
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lr = LogReader("a2a0ccea32023010|2023-07-27--13-01-19/-1") # last segment
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lr = LogReader("a2a0ccea32023010|2023-07-27--13-01-19/:5") # first 5 segments
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lr = LogReader("a2a0ccea32023010|2023-07-27--13-01-19/1:") # all except first segment
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```
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and can select which type of logs to grab
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```python
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lr = LogReader("a2a0ccea32023010|2023-07-27--13-01-19/4/q") # get qlogs
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lr = LogReader("a2a0ccea32023010|2023-07-27--13-01-19/4/r") # get rlogs (default)
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```
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