Developer tips

Cython

Compile in debug

make clean
export CYTHON_DEBUG=true
python setup.py build_ext --inplace

Debugging cythonized code

Run your python program with cython debugger :
cygdb . -- --args python3-dbg test.py

Backtesting data

Backtesting data files are sqlite database files. When using the regular data collector, these files contain every historical candles the requested exchange is willing to give. You can use a SQLite browser to explore these files.

Pytest

Fatal Python error: Segmentation fault

  • Compile the package in debug
  • Run tests with test.py :
import pytest
if __name__ == '__main__':
pytest.main(["tests"])
and
> cygdb . -- --args python3-dbg test.py

Strategy tests

To quickly check tentacles strategy tests states or develop a new tentacles strategy test, change the following lines in octobot/tests/functional_tests/strategy_evaluators_tests/abstract_strategy_test.py:
def _handle_results(self, independent_backtesting, profitability):
exchange_manager_ids = get_independent_backtesting_exchange_manager_ids(independent_backtesting)
for exchange_manager in get_exchange_managers_from_exchange_ids(exchange_manager_ids):
_, run_profitability, _, market_average_profitability, _ = get_profitability_stats(exchange_manager)
actual = round(run_profitability, 3)
# uncomment this print for building tests
# print(f"results: rounded run profitability {actual} market profitability: {market_average_profitability}"
# f" expected: {profitability} [result: {actual == profitability}]")
assert actual == profitability
into
def _handle_results(self, independent_backtesting, profitability):
exchange_manager_ids = get_independent_backtesting_exchange_manager_ids(independent_backtesting)
for exchange_manager in get_exchange_managers_from_exchange_ids(exchange_manager_ids):
_, run_profitability, _, market_average_profitability, _ = get_profitability_stats(exchange_manager)
actual = round(run_profitability, 3)
# uncomment this print for building tests
print(f"results: rounded run profitability {actual} market profitability: {market_average_profitability}"
f" expected: {profitability} [result: {actual == profitability}]")
# assert actual == profitability
This will not stop tests on failure and display the current tests results as well as expected values.
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On this page
Cython
Compile in debug
Debugging cythonized code
Backtesting data
Pytest
Fatal Python error: Segmentation fault
Strategy tests