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Pyre-python reader for DLT log files

Project description

dltpy - library and utilities for DLT logging



dltpy uses native extension to parse and filter messages. This is done purely for performance reasons. In my usecases which involve filtering out ~95% of the logs it speeds up the processing ~20 times. As a funny fact, due to stricter filtering dltpy-dump is even faster than dlt-convert -a for me.

  • boost::python. Sorry for the pain. If it complains about it, make sure that you have the -dev package installed. Also keep in mind that is has to be built/installed for every minor version of python. So if you built python 3.7 for your ubuntu 16.04, apt-get won't help you, you have to built boost yourself. Sorry again.

  • fmtlib for native logging and formatting exceptions

git clone git+
(cd dltpy; git checkout native-dltreader)
pip install --user ./dltpy


There are 3 commandline utilities that demonstrate usage of the library:

  • dltpy-print prints specified .dlt file as plain text. "text-like" payloads are decoded and printed as text, others are repr()ed
  • dltpy-filter filters out unneeded boring messages. Run it with -f IDS:OF YOUR:APPS and enjoy tiny logs that take seconds to load.
  • dltpy-receive demonstrates integration with asyncio and direct use of the native module, like dlt-receive. The main difference is that it gracefully reconnects if, for example, your device reboots.

Please note that non-verbose messages are skipped by DltFile since it has no way of decoding the payload.

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