The web-app is used for building causal relationships.

For example, it is possible to simulate the relationships between such entities as:

• Stocks
• Inflation
• Volatility

In case the Inflation increasing, Stock's price increasing too but Stocks's Volatility decreasing

On the diagram it is shown as 4 markers. The Stock point is a router used to route actions between Inflation marker and other markers.

The app has the following features:

• Set marker
  • Color
  • Search
• Link markers with multiple events
  • Search links
• Route actions in router as sequences
• Call event's chain to color route
• Move and zoom the canvas

Dependencies

• min python v. == 3.7
• Neo4J
• Vue.js
• d3.js

CYPHER

• create node
• get node by id
• link two nodes
• delete node
• delete link
• get all nodes
• get all links
• set node params

CREATE node in table (table can be not existed):\

• CREATE (n: TableName)
• CREATE (n: TableName {title: 'Title')

GET node by id
MATCH (n: TableName) WHERE ID(n) = 1 RETURN n

GET nodes by property MATCH (n: TableName {title: 'Title'}) RETURN n

DELETE table
MATCH (n: TableName) DELETE n

SET new properties on a node
MATCH (n:TableName) WHERE ID(n) = 1 SET n.title = 'Title'

LINK two nodes

MATCH (n1:TableName), (n2:TableName)
WHERE ID(n1) = 1 AND ID(n2) = 2
CREATE (n1)-[link:LinkName]->(n2)

GET all relationships MATCH (n:TableName)-[r]-() RETURN r

GET relationship by id MATCH (n:TableName)-[r]-() WHERE ID(r)=1 RETURN r

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LINTER

Execute check
pylint <folder or file name with extension>

Make conf file
pylint --generate-rcfile > .pylintrc

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VENV [Windows]

Activate

• on Windows: venv/Scripts/activate
• on Linux: source venv/bin/activate

Deactivate:
deactivate

Save packages names in file
pip freeze > requirements.txt

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TESTS

Run tests
python tests.py

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RUN

Run program
python server/main.py