demo-process-models/examples/1-basic-concepts/understanding-data-part-1/python.bpmn

<?xml version="1.0" encoding="UTF-8"?>
<bpmn:definitions xmlns:bpmn="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:dc="http://www.omg.org/spec/DD/20100524/DC" xmlns:di="http://www.omg.org/spec/DD/20100524/DI" xmlns:spiffworkflow="http://spiffworkflow.org/bpmn/schema/1.0/core" id="Definitions_96f6665" targetNamespace="http://bpmn.io/schema/bpmn" exporter="Camunda Modeler" exporterVersion="3.0.0-dev">
  <bpmn:process id="Process_1smb9b5" isExecutable="true">
    <bpmn:startEvent id="StartEvent_1">
      <bpmn:outgoing>Flow_0bngcu2</bpmn:outgoing>
    </bpmn:startEvent>
    <bpmn:sequenceFlow id="Flow_0bngcu2" sourceRef="StartEvent_1" targetRef="Activity_10fbwgl" />
    <bpmn:scriptTask id="Activity_10fbwgl" name="Simple Script Task">
      <bpmn:incoming>Flow_0bngcu2</bpmn:incoming>
      <bpmn:outgoing>Flow_0ggy7w4</bpmn:outgoing>
      <bpmn:script>
# Creating Variables
age = 51 # This is an integer
height = 1.93 # This is a float or "floating point number"
children = ['Robert', 'Edward', 'Tad', 'Willie'] # This is a list
is_married = True # This is a boolean

# Updating Variables
Age = 50  # Variables are case sensitive, this is a new variable.
age = 54  # This updates the age variable.

# Referencing variables
my_age = age # my_age is now set to 54

# Deleting variables
del(Age)  # The age variable no longer exists.  You will get an error if you try to use it.


# This is a dictionary, and you will use a lot of them...
cabinet = {
    "Secretary of State": "William H. Seward",
    "Secretary of the Treasury": "Salmon P. Chase",
    "Secretary of War": "Edwin M. Stanton",
    "Attorney General": "Edward Bates"
}

# Dictionaries can be deeply nested and contain any type of variable
cabinet = {
    "Secretary of State": {
        "name": "William H. Seward",
        "age": 60,
        "children": ['William Jr.', 'Frederick', 'Augustus', 'Anna']
    }
}

</bpmn:script>
    </bpmn:scriptTask>
    <bpmn:sequenceFlow id="Flow_0ggy7w4" sourceRef="Activity_10fbwgl" targetRef="Activity_0n8y9m7" />
    <bpmn:manualTask id="Activity_0n8y9m7" name="About PEP8">
      <bpmn:extensionElements>
        <spiffworkflow:instructionsForEndUser># Readability
The creator of Python Guido van Rossum, said 
 “Code is read much more often than it’s written.” IT's important to create code that is easy to understand later on.  

For this reason we recommend following a popular standard called [PEP8](https://realpython.com/python-pep8/)

Here are some highlights from the standard, along with a few additions specific to working with SpiffWorkflow:

## Variables

### Formatting:
being consistent in the naming of your variables makes them far easier to remember.  If you always use lower case and separate words with underscores, you don't have to try and remember the formatting, you just have to remember what it is called.  If everyone follows this standard, then you can remember their variables easier as well ...

  * my_name (GOOD)
   * MyName (NO) 
    * myname (NO)

### Use Thoughtful names.
Avoid names that don't have meaning, or are cryptic.  Try to names that are descriptive and concise.
  * first_name = "Alex" (GOOD)
  * x = "Abraham Lincoln" (NO)
  * fn = "Abraham" (NO)

EEE 

</spiffworkflow:instructionsForEndUser>
      </bpmn:extensionElements>
      <bpmn:incoming>Flow_0ggy7w4</bpmn:incoming>
    </bpmn:manualTask>
  </bpmn:process>
  <bpmndi:BPMNDiagram id="BPMNDiagram_1">
    <bpmndi:BPMNPlane id="BPMNPlane_1" bpmnElement="Process_1smb9b5">
      <bpmndi:BPMNShape id="_BPMNShape_StartEvent_2" bpmnElement="StartEvent_1">
        <dc:Bounds x="142" y="12" width="36" height="36" />
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape id="Activity_079whp1_di" bpmnElement="Activity_10fbwgl">
        <dc:Bounds x="230" y="-10" width="100" height="80" />
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape id="Activity_0ip5gqo_di" bpmnElement="Activity_0n8y9m7">
        <dc:Bounds x="390" y="-10" width="100" height="80" />
        <bpmndi:BPMNLabel />
      </bpmndi:BPMNShape>
      <bpmndi:BPMNEdge id="Flow_0bngcu2_di" bpmnElement="Flow_0bngcu2">
        <di:waypoint x="178" y="30" />
        <di:waypoint x="230" y="30" />
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge id="Flow_0ggy7w4_di" bpmnElement="Flow_0ggy7w4">
        <di:waypoint x="330" y="30" />
        <di:waypoint x="390" y="30" />
      </bpmndi:BPMNEdge>
    </bpmndi:BPMNPlane>
  </bpmndi:BPMNDiagram>
</bpmn:definitions>