Feature/v3/feature/386 use better default logging colors and dont log to file by default

.github/ISSUE_TEMPLATE/config.yml

@@ -1,4 +1,4 @@
-blank_issues_enabled: false
+blank_issues_enabled: true
 contact_links:
   - name: 🤔 Modeling Questions
     url: https://github.com/flixOpt/flixopt/discussions/categories/q-a

CHANGELOG.md

@@ -4,6 +4,8 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 Formatting is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/) & [Gitmoji](https://gitmoji.dev).
 For more details regarding the individual PRs and contributors, please refer to our [GitHub releases](https://github.com/flixOpt/flixopt/releases).
 
+---
+
 <!-- This text won't be rendered
 Note: The CI will automatically append a "What's Changed" section to the changelog for github releases.
 This contains all commits, PRs, and contributors.
@@ -46,7 +48,6 @@ Please keep the format of the changelog consistent with the other releases, so t
 ### 💥 Breaking Changes
 
 ### ♻️ Changed
-- Using `h5netcdf` instead of `netCDF4` for dataset I/O operations. This follows the update in `xarray==2025.09.01`
 
 ### 🗑️ Deprecated
 
@@ -57,15 +58,59 @@ Please keep the format of the changelog consistent with the other releases, so t
 ### 🔒 Security
 
 ### 📦 Dependencies
-- Updated `renovate.config` to treat CalVer packages (xarray and dask) with more care
 
 ### 📝 Docs
 
 ### 👷 Development
+- Enable blank issues
 
 ### 🚧 Known Issues
 
 Until here -->
+
+## [2.2.0] - 2025-10-11
+**Summary:** This release is a Configuration and Logging management release.
+
+### ✨ Added
+- Added `CONFIG.reset()` method to restore configuration to default values
+- Added configurable log file rotation settings: `CONFIG.Logging.max_file_size` and `CONFIG.Logging.backup_count`
+- Added configurable log format settings: `CONFIG.Logging.date_format` and `CONFIG.Logging.format`
+- Added configurable console settings: `CONFIG.Logging.console_width` and `CONFIG.Logging.show_path`
+- Added `CONFIG.Logging.Colors` nested class for customizable log level colors using ANSI escape codes (works with both standard and Rich handlers)
+- All examples now enable console logging to demonstrate proper logging usage
+- Console logging now outputs to `sys.stdout` instead of `sys.stderr` for better compatibility with output redirection
+
+### ♻️ Changed
+- Logging and Configuration management changed
+- **Breaking**: Console logging is now disabled by default (`CONFIG.Logging.console = False`). Enable it explicitly in your scripts with `CONFIG.Logging.console = True` and `CONFIG.apply()`
+- **Breaking**: File logging is now disabled by default (`CONFIG.Logging.file = None`). Set a file path to enable file logging
+- Improved default logging colors: DEBUG is now gray (`\033[90m`) for de-emphasized messages, INFO uses terminal default color (`\033[0m`) for clean output
+
+### 🗑️ Deprecated
+- `change_logging_level()` function is now deprecated in favor of `CONFIG.Logging.level` and `CONFIG.apply()`. Will be removed in version 3.0.0.
+
+### 🔥 Removed
+- Removed unused `config.merge_configs` function from configuration module
+
+### 👷 Development
+- Greatly expanded test coverage for `config.py` module
+- Added `@pytest.mark.xdist_group` to `TestConfigModule` tests to prevent global config interference
+
+---
+
+## [2.1.11] - 2025-10-05
+**Summary:** Important bugfix in `Storage` leading to wrong results due to incorrect discharge losses.
+
+### ♻️ Changed
+- Using `h5netcdf` instead of `netCDF4` for dataset I/O operations. This follows the update in `xarray==2025.09.01`
+
+### 🐛 Fixed
+- Fix `charge_state` Constraint in `Storage` leading to incorrect losses in discharge and therefore incorrect charge states and discharge values.
+
+### 📦 Dependencies
+- Updated `renovate.config` to treat CalVer packages (xarray and dask) with more care
+- Updated packaging configuration
+
 ---
 
 ## [2.1.10] - 2025-09-29

examples/00_Minmal/minimal_example.py

@@ -9,6 +9,9 @@
 import flixopt as fx
 
 if __name__ == '__main__':
+    # Enable console logging
+    fx.CONFIG.Logging.console = True
+    fx.CONFIG.apply()
     # --- Define the Flow System, that will hold all elements, and the time steps you want to model ---
     timesteps = pd.date_range('2020-01-01', periods=3, freq='h')
     flow_system = fx.FlowSystem(timesteps)

examples/01_Simple/simple_example.py

@@ -8,6 +8,9 @@
 import flixopt as fx
 
 if __name__ == '__main__':
+    # Enable console logging
+    fx.CONFIG.Logging.console = True
+    fx.CONFIG.apply()
     # --- Create Time Series Data ---
     # Heat demand profile (e.g., kW) over time and corresponding power prices
     heat_demand_per_h = np.array([30, 0, 90, 110, 110, 20, 20, 20, 20])

examples/02_Complex/complex_example.py

@@ -9,6 +9,9 @@
 import flixopt as fx
 
 if __name__ == '__main__':
+    # Enable console logging
+    fx.CONFIG.Logging.console = True
+    fx.CONFIG.apply()
     # --- Experiment Options ---
     # Configure options for testing various parameters and behaviors
     check_penalty = False

examples/02_Complex/complex_example_results.py

@@ -5,6 +5,9 @@
 import flixopt as fx
 
 if __name__ == '__main__':
+    # Enable console logging
+    fx.CONFIG.Logging.console = True
+    fx.CONFIG.apply()
     # --- Load Results ---
     try:
         results = fx.results.CalculationResults.from_file('results', 'complex example')

examples/03_Calculation_types/example_calculation_types.py

@@ -11,6 +11,9 @@
 import flixopt as fx
 
 if __name__ == '__main__':
+    # Enable console logging
+    fx.CONFIG.Logging.console = True
+    fx.CONFIG.apply()
     # Calculation Types
     full, segmented, aggregated = True, True, True
 

flixopt/__init__.py

@@ -35,5 +35,3 @@
     results,
     solvers,
 )
-
-CONFIG.load_config()

flixopt/calculation.py

@@ -91,13 +91,13 @@ def main_results(self) -> dict[str, Scalar | dict]:
                     model.label_of_element: float(model.size.solution)
                     for component in self.flow_system.components.values()
                     for model in component.model.all_sub_models
-                    if isinstance(model, InvestmentModel) and float(model.size.solution) >= CONFIG.modeling.EPSILON
+                    if isinstance(model, InvestmentModel) and float(model.size.solution) >= CONFIG.Modeling.epsilon
                 },
                 'Not invested': {
                     model.label_of_element: float(model.size.solution)
                     for component in self.flow_system.components.values()
                     for model in component.model.all_sub_models
-                    if isinstance(model, InvestmentModel) and float(model.size.solution) < CONFIG.modeling.EPSILON
+                    if isinstance(model, InvestmentModel) and float(model.size.solution) < CONFIG.Modeling.epsilon
                 },
             },
             'Buses with excess': [
@@ -164,7 +164,7 @@ def solve(self, solver: _Solver, log_file: pathlib.Path | None = None, log_main_
             from .io import document_linopy_model
 
             document_linopy_model(self.model, paths.model_documentation)
-            self.flow_system.to_netcdf(paths.flow_system, engine='h5netcdf')
+            self.flow_system.to_netcdf(paths.flow_system)
             raise RuntimeError(
                 f'Model was infeasible. Please check {paths.model_documentation=} and {paths.flow_system=} for more information.'
             )

flixopt/components.py

@@ -791,7 +791,7 @@ def do_modeling(self):
                 charge_state.isel(time=slice(1, None))
                 == charge_state.isel(time=slice(None, -1)) * ((1 - rel_loss) ** hours_per_step)
                 + charge_rate * eff_charge * hours_per_step
-                - discharge_rate * eff_discharge * hours_per_step,
+                - discharge_rate * hours_per_step / eff_discharge,
                 name=f'{self.label_full}|charge_state',
             ),
             'charge_state',