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Update derived strategy documentation

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Matthias 2022-03-20 13:14:52 +01:00
parent 6ec7b84b92
commit e9c4e6a69d
2 changed files with 10 additions and 7 deletions
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11
docs/strategy-advanced.md
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@ -146,7 +146,7 @@ def version(self) -> str:
The strategies can be derived from other strategies. This avoids duplication of your custom strategy code. You can use this technique to override small parts of your main strategy, leaving the rest untouched: The strategies can be derived from other strategies. This avoids duplication of your custom strategy code. You can use this technique to override small parts of your main strategy, leaving the rest untouched:
``` python ``` python title="user_data/strategies/myawesomestrategy.py"
class MyAwesomeStrategy(IStrategy): class MyAwesomeStrategy(IStrategy):
... ...
stoploss = 0.13 stoploss = 0.13
@ -155,6 +155,10 @@ class MyAwesomeStrategy(IStrategy):
# should be in any custom strategy... # should be in any custom strategy...
... ...
```
``` python title="user_data/strategies/MyAwesomeStrategy2.py"
from myawesomestrategy import MyAwesomeStrategy
class MyAwesomeStrategy2(MyAwesomeStrategy): class MyAwesomeStrategy2(MyAwesomeStrategy):
# Override something # Override something
stoploss = 0.08 stoploss = 0.08
@ -163,16 +167,15 @@ class MyAwesomeStrategy2(MyAwesomeStrategy):
Both attributes and methods may be overridden, altering behavior of the original strategy in a way you need. Both attributes and methods may be overridden, altering behavior of the original strategy in a way you need.
While keeping the subclass in the same file is technically possible, it can lead to some problems with hyperopt parameter files.
!!! Note "Parent-strategy in different files" !!! Note "Parent-strategy in different files"
If you have the parent-strategy in a different file, you can still import the strategy. If you have the parent-strategy in a different file, you can still import the strategy.
Assuming `myawesomestrategy.py` is the filename, and `MyAwesomeStrategy` the strategy you need to import: Assuming `myawesomestrategy.py` is the filename, and `MyAwesomeStrategy` the strategy you need to import:
``` python ``` python
from myawesomestrategy import MyAwesomeStrategy
``` ```
This is the recommended way to derive strategies to avoid problems with hyperopt parameter files.
## Embedding Strategies ## Embedding Strategies
Freqtrade provides you with an easy way to embed the strategy into your configuration file. Freqtrade provides you with an easy way to embed the strategy into your configuration file.

6
freqtrade/resolvers/iresolver.py
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@ -75,8 +75,8 @@ class IResolver:
# Generate spec based on absolute path # Generate spec based on absolute path
# Pass object_name as first argument to have logging print a reasonable name. # Pass object_name as first argument to have logging print a reasonable name.
with PathModifier(module_path.parent): with PathModifier(module_path.parent):
module_name = module_path.stem or ""
spec = importlib.util.spec_from_file_location(module_path.stem or "", str(module_path)) spec = importlib.util.spec_from_file_location(module_name, str(module_path))
if not spec: if not spec:
return iter([None]) return iter([None])
@ -95,7 +95,7 @@ class IResolver:
module, inspect.isclass) if ((object_name is None or object_name == name) module, inspect.isclass) if ((object_name is None or object_name == name)
and issubclass(obj, cls.object_type) and issubclass(obj, cls.object_type)
and obj is not cls.object_type and obj is not cls.object_type
and obj.__module__ == module_path.stem or "" and obj.__module__ == module_name
) )
) )
# The __module__ check ensures we only use strategies that are defined in this folder. # The __module__ check ensures we only use strategies that are defined in this folder.