Блок схема функции python

Saved searches

Use saved searches to filter your results more quickly

You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session. You switched accounts on another tab or window. Reload to refresh your session.

Python codes to Flowcharts

License

cdfmlr/pyflowchart

This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.

Name already in use

A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?

Sign In Required

Please sign in to use Codespaces.

Launching GitHub Desktop

If nothing happens, download GitHub Desktop and try again.

Launching GitHub Desktop

If nothing happens, download GitHub Desktop and try again.

Launching Xcode

If nothing happens, download Xcode and try again.

Launching Visual Studio Code

Your codespace will open once ready.

There was a problem preparing your codespace, please try again.

Latest commit

Git stats

Files

Failed to load latest commit information.

README.md

PyFlowchart is a Python package that lets you:

PyFlowchart produces flowcharts in the flowchart.js flowchart DSL, a widely used textual representation of flowcharts. You can convert these flowcharts to images using flowchart.js.org, francoislaberge/diagrams, or some markdown editors.

Want to flowchart your Python code in example.py ? Run this:

$ python -m pyflowchart example.py

⚠️ PyFlowchart works with Python 3.7+. To check your Python version, run python —version .

If you have both Python 2 and Python 3 installed, you may need to use python3 instead of python . This is becoming less common as Python 2 is sunsetting.

PyFlowchart will output the generated flowchart.js DSL. You can convert the output code to a rendered diagram by going to http://flowchart.js.org or using editors like Typora.

To specify a function (or a method in a class) to flowchartlize:

$ python -m pyflowchart example.py -f function_name # or $ python -m pyflowchart example.py -f ClassName.method_name

For example, to flowchartlize the add() function in the MyClass class, you would use the following command: python3 -m pyflowchart example.py -f MyClass.add .

🎉 Now you are ready to flowchart your code!

To learn more about how to use PyFlowchart, keep reading this document.

PyFlowchart lets you write flowcharts in Python, which can be automatically translated into the flowchart.js DSL.

The following flowchart.js node types are supported:

• StartNode
• OperationNode
• ConditionNode
• InputOutputNode
• SubroutineNode
• EndNode

To connect nodes, use the connect() method. For ConditionNodes, use the connect_ syntax. You can optionally specify the connect_direction as a second parameter.

Get a Flowchart with your start node and call its flowchart() method to generate flowchart.js flowchart DSL：

from pyflowchart import * st = StartNode('a_pyflow_test') op = OperationNode('do something') cond = ConditionNode('Yes or No?') io = InputOutputNode(InputOutputNode.OUTPUT, 'something. ') sub = SubroutineNode('A Subroutine') e = EndNode('a_pyflow_test') st.connect(op) op.connect(cond) cond.connect_yes(io) cond.connect_no(sub) sub.connect(op, "right") # sub->op line starts from the right of sub io.connect(e) fc = Flowchart(st) print(fc.flowchart())

st0=>start: start a_pyflow_test op1=>operation: do something cond2=>condition: Yes or No? io3=>inputoutput: output: something. e5=>end: end a_pyflow_test sub4=>subroutine: A Subroutine st0->op1 op1->cond2 cond2-> cond2-> cond2(yes)->io3 io3->e5 cond2(no)->sub4 sub4(right)->op1 

Then you can visit http://flowchart.js.org and translate the generated textual representation into SVG flow chart diagrams:

By the way, many Markdown editors, like Typora, also support this flowchart syntax. For more information, see the Typora documentation on flowcharts. If you prefer the command line, you can use francoislaberge/diagrams.

Starting with v0.2.0, you can use the Node.set_param(key, value) method to generate flowcharts like this:

element(param1=value1,param2=value2)=>start: Start 

There is also a shortcut to set the align-next=no parameter for ConditionNodes:

cond = ConditionNode("a cond node") cond.no_align_next() # or do this at __init__: cond = ConditionNode("a cond node", align_next=False)

This usually works with a connect_direction customization:

The generated flowchart will look like:

cond(align-next=no)=>condition: Yes or No? . cond(yes,right)->op 

PyFlowchart can also translate your Python code into flowcharts.

For example, let’s say you have a Python file called simple.py with the following code:

def foo(a, b): if a: print("a") else: for i in range(3): print("b") return a + b

To generate a flowchart from this code, you can run the following command in the terminal:

$ python -m pyflowchart simple.py # output flowchart code.

>>> from pyflowchart import Flowchart >>> with open('simple.py') as f: . code = f.read() . >>> fc = Flowchart.from_code(code) >>> print(fc.flowchart()) # output flowchart code.

As mentioned above, we use Flowchart.from_code to translate Python codes into Flowcharts. The from_code is defined as:

Flowchart.from_code(code, field="", inner=True, simplify=True, conds_align=False)

• code : The Python code to be converted into a flowchart.
• field : The name of a field in the code to be converted into a flowchart. If this parameter is not specified, the entire code will be converted.
• inner : If True , the body of the field will be parsed as a nested flowchart. If False , the body of the field will be parsed as a single node.
• simplify : If True , simple If and Loop statements will be simplified. For example, an If statement with a single expression will be converted into a single node.
• conds_align : If True , consecutive If statements will be aligned in the flowchart.

PyFlowchart CLI is a 1:1 interface for this function:

python -m pyflowchart [-f FIELD] [-i] [--no-simplify] [--conds-align] code_file

• -f FIELD : The name of the field to be converted into a flowchart.
• -i : If specified, the body of the field will be parsed as a nested flowchart.
• —no-simplify : If specified, the If and Loop statements will not be simplified.
• —conds-align : If specified, consecutive If statements will be aligned in the flowchart.

the field is the path to a field (i.e. a function) you want to draw a flowchart.

# example.py print("start") def foo(): foo = "foo" class Bar(): def buzz(self, f): def g(self): print("g") f(self) return g(self) Bar().buzz(foo) print("end")

For example.py above, available paths are:

- "" (means the whole code) - "foo" - "Bar.buzz" - "Bar.buzz.g" 

To generate a flowchart of Bar.buzz.g ：

# Python from pyflowchart import Flowchart with open('example.py') as f: code = f.read() fc = Flowchart.from_code(code, field='Bar.buzz.g', inner=False) print(fc.flowchart())

# CLI python -m pyflowchart example.py -f Bar.buzz.g

The inner parameter controls how the parser behaves. If inner=True , the parser will look into the field and parse its body. If inner=False , the parser will take the field as a single node.

In CLI, the -i argument sets inner=True . The absence of -i argument implies inner=False .

🔧 For developers: Techly, inner=True means parsing field.body , while inner=False parses [field] .

The simplify parameter controls whether to simplify If and Loop statements. When simplify=True , an If or Loop statements with one-line-body will be simplified into a single node.

For example, the following code:

# example_simplify.py a = 1 if a == 1: print(a) while a  4: a = a + 1

Would be converted into the following flowchart when simplify=True :

flowchart = Flowchart.from_code(example_simplify_py, field="", inner=True) print(flowchart.flowchart()) # SH $ python -m pyflowchart example_simplify.py 

flowchart = Flowchart.from_code(example_simplify_py, field="", inner=True, simplify=False) print(flowchart.flowchart()) # SH $ python -m pyflowchart --no-simplify example_simplify.py 

The conds-align parameter controls whether consecutive If statements are aligned in the flowchart. When conds-align=True , consecutive If statements are aligned in the flowchart.

# example-conds-align.py if cond1: op1 if cond2: op2 if cond3: op3 op_end

Note: This feature is still in beta and may not work perfectly in all cases.

The flowcharts generated by PyFlowchart may not always be perfect. In these cases, you can modify the generated flowchart code yourself or consider making your Python source code more clear. Clear and beautiful Python source code will result in more beautiful flowcharts generated by PyFlowchart.

$ pyflowchart example.py -o flowchart.svg

Depends on node.js and flowchart.js .

A GUI for PyFlowchart would be amazing. You could paste your Python code into it, and the flowchart DSL would be generated in real time, with the flowchart displayed alongside it. You could clearly see how the two are related.

Unfortunately, I am too busy (pronounced as [ˈlеizi] ——lazy) to code these ideas myself. Please submit an issue to push me on. Or, PR to make it by yourself. I cannot wait to appreciate your great contribution!

Copyright 2020-2023 CDFMLR. All rights reserved.

Licensed under the MIT License.

Источник