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**Robot and Marbles Tutorial Series**

In this series, we introduce basic concepts of cadCAD and system modelling in general using a simple toy model.
[Part 1](robot-marbles-part-1/robot-marbles-part-1.ipynb) - States and State Update Functions
[Part 2](robot-marbles-part-2/robot-marbles-part-2.ipynb) - Actions and State Dependent Policies
[Part 3](robot-marbles-part-3/robot-marbles-part-3.ipynb) - From Synchronous to Asynchronous Time
[Part 4](robot-marbles-part-4/robot-marbles-part-4.ipynb) - Uncertainty and Stochastic Processes
[Part 5](robot-marbles-part-5/robot-marbles-part-5.ipynb) - Using class objects as state variables

Check out the [videos](videos) folder for detailed walkthroughs of each one of the tutorials.
cadCAD is now open source! The tutorials have been moved to the [main repo](https://github.com/BlockScience/cadCAD)
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cadCAD is now open source! The tutorials have been moved to the [main repo](https://github.com/BlockScience/cadCAD)
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cadCAD
===
```
__________ ____
________ __ _____/ ____/ | / __ \
/ ___/ __` / __ / / / /| | / / / /
/ /__/ /_/ / /_/ / /___/ ___ |/ /_/ /
\___/\__,_/\__,_/\____/_/ |_/_____/
by BlockScience
```

**Introduction:**

cadCAD is a Python library that assists in the processes of designing, testing and validating complex systems through
simulation. At its core, cadCAD is a differential games engine that supports parameter sweeping and Monte Carlo analyses
and can be easily integrated with other scientific computing Python modules and data science workflows.

**Description:**

cadCAD (complex adaptive systems computer-aided design) is a python based, unified modeling framework for stochastic
dynamical systems and differential games for research, validation, and Computer Aided Design of economic systems created
by BlockScience. It is capable of modeling systems at all levels of abstraction from Agent Based Modeling (ABM) to
System Dynamics (SD), and enabling smooth integration of computational social science simulations with empirical data
science workflows.


An economic system is treated as a state-based model and defined through a set of endogenous and exogenous state
variables which are updated through mechanisms and environmental processes, respectively. Behavioral models, which may
be deterministic or stochastic, provide the evolution of the system within the action space of the mechanisms.
Mathematical formulations of these economic games treat agent utility as derived from the state rather than direct from
an action, creating a rich, dynamic modeling framework. Simulations may be run with a range of initial conditions and
parameters for states, behaviors, mechanisms, and environmental processes to understand and visualize network behavior
under various conditions. Support for A/B testing policies, Monte Carlo analysis, and other common numerical methods is
provided.


In essence, cadCAD tool allows us to represent a company’s or community’s current business model along with a desired
future state and helps make informed, rigorously tested decisions on how to get from today’s stage to the future state.
It allows us to use code to solidify our conceptualized ideas and see if the outcome meets our expectations. We can
iteratively refine our work until we have constructed a model that closely reflects reality at the start of the model,
and see how it evolves. We can then use these results to inform business decisions.


#### Documentation:
* ##### [Tutorials](https://github.com/BlockScience/cadCAD-Tutorials/tree/master/01%20Tutorials)
* ##### [System Model Configuration](https://github.com/BlockScience/cadCAD-Tutorials/blob/master/documentation/Simulation_Configuration.md)
* ##### [System Simulation Execution](https://github.com/BlockScience/cadCAD-Tutorials/blob/master/documentation/Simulation_Execution.md)


#### 0. Installation:

cadCAD is in private beta. Access to a JupyterHUB instance (or tokens) are issued to participants. If you'd like to
participate in the beta program, contact cadcad [at] block [dot] science.

Replace `<TOKEN>` in the installation URL below.
```bash
pip3 install pandas pathos fn funcy tabulate
pip3 install cadCAD --extra-index-url https://<TOKEN>@repo.fury.io/blockscience/
```

#### 1. [Configure System Model](https://github.com/BlockScience/cadCAD-Tutorials/blob/master/documentation/Simulation_Configuration.md)

#### 2. [Execute Simulations:](https://github.com/BlockScience/cadCAD-Tutorials/blob/master/documentation/Simulation_Execution.md)

##### Single Process Execution:
Example System Model Configurations:
* [System Model A](https://github.com/BlockScience/cadCAD-Tutorials/blob/master/documentation/examples/sys_model_A.py):
`/documentation/examples/sys_model_A.py`
* [System Model B](https://github.com/BlockScience/cadCAD-Tutorials/blob/master/documentation/examples/sys_model_B.py):
`/documentation/examples/sys_model_B.py`

Example Simulation Executions:
* [System Model A](https://github.com/BlockScience/cadCAD-Tutorials/blob/master/documentation/examples/sys_model_A_exec.py):
`/documentation/examples/sys_model_A_exec.py`
* [System Model B](https://github.com/BlockScience/cadCAD-Tutorials/blob/master/documentation/examples/sys_model_B_exec.py):
`/documentation/examples/sys_model_B_exec.py`

```python
import pandas as pd
from tabulate import tabulate
from cadCAD.engine import ExecutionMode, ExecutionContext, Executor
from documentation.examples import sys_model_A
from cadCAD import configs

exec_mode = ExecutionMode()

# Single Process Execution using a Single System Model Configuration:
# sys_model_A
sys_model_A = [configs[0]] # sys_model_A
single_proc_ctx = ExecutionContext(context=exec_mode.single_proc)
sys_model_A_simulation = Executor(exec_context=single_proc_ctx, configs=sys_model_A)

sys_model_A_raw_result, sys_model_A_tensor_field = sys_model_A_simulation.execute()
sys_model_A_result = pd.DataFrame(sys_model_A_raw_result)
print()
print("Tensor Field: sys_model_A")
print(tabulate(sys_model_A_tensor_field, headers='keys', tablefmt='psql'))
print("Result: System Events DataFrame")
print(tabulate(sys_model_A_result, headers='keys', tablefmt='psql'))
print()
```

##### Multiple Simulations (Concurrent):
###### Multiple Simulation Execution (Multi Process Execution)
System Model Configurations:
* [System Model A](https://github.com/BlockScience/cadCAD-Tutorials/blob/master/documentation/examples/sys_model_A.py):
`/documentation/examples/sys_model_A.py`
* [System Model B](https://github.com/BlockScience/cadCAD-Tutorials/blob/master/documentation/examples/sys_model_B.py):
`/documentation/examples/sys_model_B.py`

[Example Simulation Executions:](https://github.com/BlockScience/cadCAD-Tutorials/blob/master/documentation/examples/sys_model_AB_exec.py)
`/documentation/examples/sys_model_AB_exec.py`

```python
import pandas as pd
from tabulate import tabulate
from cadCAD.engine import ExecutionMode, ExecutionContext, Executor
from documentation.examples import sys_model_A, sys_model_B
from cadCAD import configs

exec_mode = ExecutionMode()

# # Multiple Processes Execution using Multiple System Model Configurations:
# # sys_model_A & sys_model_B
multi_proc_ctx = ExecutionContext(context=exec_mode.multi_proc)
sys_model_AB_simulation = Executor(exec_context=multi_proc_ctx, configs=configs)

i = 0
config_names = ['sys_model_A', 'sys_model_B']
for sys_model_AB_raw_result, sys_model_AB_tensor_field in sys_model_AB_simulation.execute():
sys_model_AB_result = pd.DataFrame(sys_model_AB_raw_result)
print()
print(f"Tensor Field: {config_names[i]}")
print(tabulate(sys_model_AB_tensor_field, headers='keys', tablefmt='psql'))
print("Result: System Events DataFrame:")
print(tabulate(sys_model_AB_result, headers='keys', tablefmt='psql'))
print()
i += 1
```

##### Parameter Sweep Simulation (Concurrent):
[Example:](https://github.com/BlockScience/cadCAD-Tutorials/blob/master/documentation/examples/param_sweep.py)
`/documentation/examples/param_sweep.py`

```python
import pandas as pd
from tabulate import tabulate
# The following imports NEED to be in the exact order
from cadCAD.engine import ExecutionMode, ExecutionContext, Executor
from documentation.examples import param_sweep
from cadCAD import configs

exec_mode = ExecutionMode()
multi_proc_ctx = ExecutionContext(context=exec_mode.multi_proc)
run = Executor(exec_context=multi_proc_ctx, configs=configs)

for raw_result, tensor_field in run.execute():
result = pd.DataFrame(raw_result)
print()
print("Tensor Field:")
print(tabulate(tensor_field, headers='keys', tablefmt='psql'))
print("Output:")
print(tabulate(result, headers='keys', tablefmt='psql'))
print()
```
cadCAD is now [open source](https://github.com/BlockScience/cadCAD)

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