Online Code IDE

In AFS, we provide a powerful Online Code IDE based on Jupyter to develop your analytic on the cloud.


The $auth_code is an environment variable from Online Code IDE, and the purpose of $auth_code is authenticating with AFS to use AFS functions in your analytics.

To check $auth_code of Online Code IDE, you can use the following snippet:

import os
auth_code = os.getenv('auth_code')

The output:


In Online Code IDE, you can define some customize configurations like memory, disk, or requirements for your analytic by declaring a manifest at the first cell. When coding the analytics, and need to use the AFS SDK package, we can add the required package in the “requirements” of the manifest.

An example is as follows:

manifest = {
    'memory': 256,
    'disk_quota': 2048,
    'buildpack': 'python_buildpack',
    'requirements': [
    'type': 'API'

In this example, memory and disk_quota are also assigned to 2048MB. If set memory or disk_quota as int type, the default unit is MB. Or, use str type and you can specify the unit in M, MB, G, or GB.

Note: The default value of disk_quota is 2048MB to avoid insufficient disk space when installing modules. If you set disk_quota less than 2048MB, the value will be overridden to 2048MB.

The requirements are the most important part in analytic develop. As native python develop, when you need some external modules, you can use requirements.txt to record all dependencies of your analytic. (More information can be found at pip docs.) Provide a list of requirements can obtain the same effect when developing analytic by AFS.

The Type is used to declare this analytic is an APP or an API. In default, all analytic will be assigned as APP type. But if you want your analytic serve as an API (and also write in any web framework), you need set type to API to host your analytic on WISE-PaaS.

Create analytic with Online Code IDE

  1. Click the CREATE button. analytic_create_button
  2. Enter the custom name of the analysis module, and press NEXT to confirm. analytic_naming_dialog
  3. When the newly established development & editing page appears in the workspace, it means the module has been successfully created and you can write the analysis module using Python programming language.
  4. After filling in the program code, you can click the icon to save it. Next, click SAVE button to push analysis training model application to the platform in the form of an App. This APP will show in Workspace list when completely deployed. online_code_ide

Install module with Vendor in private cloud

In python develop, we can use pip install $MODULE to install all required module. But in a private cloud, there is no any external internet resource can be used, including PyPI.

This restrict force all required modules should provide an offline distribution file in the private cloud when developing in Online Code IDE and save the source code to an analytic app.

This section will provide an example to use Vendor of AFS to install a module in Online Code IDE. Assume the module is already uploaded to AFS, if not, please reference documentation of Vendor to upload module.

  • Note: When using Vendor of AFS to install a module in Online Code IDE, we must add the module in the requirements of manifest, please refer the manifest section.
  1. Right-click on the module and copy the url. copy_module_url

  2. In Online Code IDE, use the following command and paste copied module url to install modules from the vendor:

    ! pip install $MODULE_URL?auth_code=$auth_code

Example of Online Code IDE

Here is an example to create Analytic API by Online Code IDE.

Step 1: Create a new Online Code IDE, please name it training_dt_model. About the detail, please refer to the Create analytic with Online Code IDE section.

Step 2: Declare the manifest. Declaring the manifest at the first cell. About the detail, please refer to the Manifest section.

manifest = {
    'memory': 1024,
    'disk_quota': 2048,
    'buildpack': 'python_buildpack',
    'requirements': [
    'type': 'API'

Step 3: Setting parameter of the analytic method. (We use the decision tree method for the example) In Online Code IDE, you can create a node on Node-RED by SDK, and you can provide the Hyper-Parameter Tuning for user. The following code must be at second cell.

from afs import config_handler
cfg = config_handler()
cfg.set_param('criterion', type='string', required=True, default="gini")
cfg.set_param('random_state', type='string', required=True, default="2")
cfg.set_param('max_depth', type='string', required=True, default="3")
cfg.set_param('K_fold', type='integer', required=True, default=10)

cfg.set_param('model_name', type='string', required=True, default="dt_model.pkl")

  • Note: When editing is complete in this cell, you must run it.

Describe the features that the SDK can produce, here is an example of Decision Tree.

Step 4: Training model Here is an example of Decision Tree: import package:

from sklearn import tree
from sklearn.cross_validation import train_test_split
from sklearn import metrics
from sklearn.externals import joblib
from afs import models
from sklearn.preprocessing import StandardScaler
from sklearn.preprocessing import LabelBinarizer
from sklearn.preprocessing import OneHotEncoder
from sklearn.model_selection import cross_val_score
from sklearn.model_selection import GridSearchCV

import pandas as pd
import numpy as np
import json
import requests

Defined function:

#Find the best parameter to training model
def grid(data, target, parameters_dt, cv):
    clf = tree.DecisionTreeClassifier()
    grid = GridSearchCV(estimator = clf, param_grid = parameters_dt, cv = cv, 
                        scoring = 'accuracy'),target)
    best_accuracy = grid.best_score_
    best_params = grid.best_params_
    return best_accuracy,best_params
#Take the best parameter to training model
def training_model(data, target,best_params, best_accuracy,model_name):
    clf = tree.DecisionTreeClassifier(**best_params)
    clf =, target)
    #save model
    joblib.dump(clf, model_name)
    client = models()
    client.upload_model(model_name, accuracy=best_accuracy, loss=0.0, tags=dict(machine='dt'))

    return model_name

Main program:

# POST /

# Set flow architecture, REQUEST is the request including body and headers from client
# Get the parameter from Node-RED setting

criterion = str(cfg.get_param('criterion'))
random_state = str(cfg.get_param('random_state'))
max_depth = str(cfg.get_param('max_depth'))
cv = cfg.get_param('K_fold')

model_name = str(cfg.get_param('model_name'))
select_feature = cfg.get_features_selected()
data_column_name = cfg.get_features_numerical()
target2 = cfg.get_features_target()

labels_column_name = [x for x in select_feature if x not in data_column_name]
labels_column_name = [x for x in labels_column_name if x not in target2]


labels_column_name = [x for x in labels_column_name if x not in a1]

if "All" in labels_column_name:


criterion = criterion.split(",")
random_state = random_state.split(",")
max_depth = max_depth.split(",")

random_state =list(map(int, random_state))
max_depth = list(map(int, max_depth))

parameters_dt = {"criterion": criterion, "random_state": random_state, "max_depth": max_depth}

# Get the data from request, and transform to DataFrame Type
df = cfg.get_data()
df = pd.DataFrame(df)

target = np.array(df.loc[:,[target2]])

if (data_column_name[0]=="All"):
    all_df_column = [df.columns[i] for i in range(len(df.columns))]
    if (labels_column_name[0]!="No"):
        for i in range(len(labels_column_name)):
    if (labels_column_name[0]=="No"):
    data = np.array(df.loc[:,all_df_column])

elif (data_column_name[0]=="No"):
    data = np.array([]).reshape(df.shape[0],0)
    if (labels_column_name[0]!="No"):
        for i in labels_column_name:   
            if ((False in map((lambda x: type(x) == str), df[i]))==False):
                label2 = LabelBinarizer().fit_transform(df[i])
                data = np.hstack((data,label2))
            if ((False in map((lambda x: type(x) == int), df[i]))==False):
                target9 = OneHotEncoder( sparse=False ).fit_transform(df[i].values.reshape(-1,1))
                data = np.hstack((data,target9))

    data = np.array(df.loc[:,data_column_name])
    if (labels_column_name[0]!="No"):
        for i in labels_column_name:   
            if ((False in map((lambda x: type(x) == str), df[i]))==False):
                label2 = LabelBinarizer().fit_transform(df[i])
                data = np.hstack((data,label2))
            if ((False in map((lambda x: type(x) == int), df[i]))==False):
                target9 = OneHotEncoder( sparse=False ).fit_transform(df[i].values.reshape(-1,1))
                data = np.hstack((data,target9))

best_accuracy,best_params = grid(data, target, parameters_dt, cv)
result = training_model(data, target,best_params, best_accuracy,model_name)
result = str(result)

df2 = pd.DataFrame([result], columns=['model_name'])
# df_dict = df2.to_dict()  

# # Send the result to next node, and result is  DataFrame Type

ret = cfg.next_node(df2, debug=False) 

# # The printing is the API response.

Step 5: Save and upload the Analytic API After we edit the Analytic App, we must save and upload it as follow steps:

(i) Click the icon is in upper left corner.

(ii) Click SAVE, and we are uploading the Analytic App now.

Wait a second, we can see that it’s successful to upload.


Pre-condition: Before creating a solution, there are preparations we must get ready. In the beginning, subscribing ota node and influxdb_query node from Catalog is required. Now, we subscribe the ota node firstly.

Step 1: Click Catalog.

Step 2: Click ota’s DETAIL.

Step 3: Click SUBSCRIBE, and we subscribe the ota node successfully.

Next, we subscribe the firehose node.

Step 4: Click Catalog.

Step 5: Click influxdb_query’s DETAIL.

Step 6: Click SUBSCRIBE, and we subscribe the influxdb_query node successfully.

Step 7: Click Workspaces, go back to workspace.

After subsribing the nodes, the system will rederect to the Analytics page. Wait a second, the Analytic APIs are created successfully.

Creating a new solution instance

Now, we start to create a new solution.

There are the steps as follows:

Step 1: Click Workspaces.

Step 2: Click SOLUTIONS.

Step 3: Click CREATE.

Step 4: Enter the solution name.

Step 5: Click CREATE to create the solution.

Step 6: Click EDIT, and the online flow IDE is shown, and we can start to create the flow.

Start create the solution by Online Flow IDE

In the Pre-condition step, we create ota node and influxdb_query node. As the example in Example of Code IDE, we create a Decision Tree node. The sso_setting already exists. Now, we have sso_setting node, influxdb_query node, training_dt_model node, and ota node.

  • How to create training_dt_model node, please refer Example of Online Code IDE above.

You need pull four nodes such that sso_setting, influxdb_query, training_dt_model, and ota.

Setup the nodes

  1. The sso_setting node

    Step 1: Enter SSO User and SSO Password.

    Step 2: Click DONE to save and exit the setting.

  2. The firehose_influxdb_query node

    Step 1: Choose Service Name, Service Key, and enter Query condition.

    Step 2: Click DONE to save your setting.

  3. The training_dt_model node

    Step 1: Enter parameters to training model.

    Step 2: Select features to training model.

    Step 3: Select numerical features.

    Step 4: Select target features to training model.

    Step 5: Please click DONE to save your setting when you complete the setup.

  4. The ota node

    Step 1: Choose Device Name and Storage Name.

    Step 2: Please click DONE to save the setting when you complete the setup.

  5. Nodes connecting

    Step 1: Connect nodes, influxdb_query connection training_dt_model and training_dt_model connection ota that like the image below.

    Step 2: Click Deploy to save Node-RED.

    Step 3: Click SAVE to save solution.

We create the solution successfully when it shows Update complete in the bottom right.