Metadata-Version: 2.1
Name: python-mltk
Version: 0.1.5
Summary: Machine Learning Toolkit (MLToolkit/mltk) for Python
Home-page: https://github.com/sptennak/MLToolkit
Author: Sumudu Tennakoon
License: Apache License Version 2.0
Description: # MLToolkit 
        ## Current release: PyMLToolkit [v0.1.5(prev)]
        
        <img src="https://raw.githubusercontent.com/sptennak/MLToolkit/master/MLToolkit.png" height="200">
        
        MLToolkit (mltk) is a Python package providing a set of user-friendly functions to help building machine learning models in data science research, teaching or production focused projects. 
        
        <img src="https://raw.githubusercontent.com/sptennak/MLToolkit/master/MLToolkit/image/MLTKProcess.png" height="200">
        
        ## Introduction
        MLToolkit supports all stages of the machine learning application development process.
        
        ## Installation
        ```
        pip install python-mltk
        ```
        If the installation failed with dependancy issues, execute the above command with --no-dependencies
        
        ```
        pip install python-mltk --no-dependencies
        ```
        
        ## Functions
        - Data Extraction (SQL, Flatfiles, etc.)
        - Exploratory Data Analysis (statistical summary, univariate analysis, etc.)
        - Feature Engineering
        - Model Building (Currently supported for binary classification only)
        - Hyper Parameter Tuning [in development for v0.2]
        - Model Performance Analysis and Comparison Between Models
        - Auto ML (automated machine learning) [in development for v0.2]
        - Model Deploymet and Serving [will be imporved for v0.2]
        
        ## Supported Machine Learning Algorithms/Packages
        - RandomForestClassifier: scikit-learn
        - LogisticRegression: statsmodels
        - Deep Feed Forward Neural Network (DFF): tensorflow
        - Convlutional Neural Network (CNN): tensorflow
        - Gradient Boost : catboost
        - ... More models will be added in the future releases ...
        
        ## Usage
        ```python
        import mltk
        ```
        
        ### Warning: Python Variable, Function or Class names 
        The Python interpreter has a number of built-in functions. It is possible to overwrite thier definitions when coding without any rasing a warning from the Python interpriter. (https://docs.python.org/3/library/functions.html)
        Therfore, AVOID THESE NAMES as your variable, function or class names.
        <table border="1">
        <tr><td>abs</td><td>all</td><td>any</td><td>ascii</td><td>bin</td><td>bool</td><td>bytearray</td><td>bytes</td></tr>
        <tr><td>callable</td><td>chr</td><td>classmethod</td><td>compile</td><td>complex</td><td>delattr</td><td>dict</td><td>dir</td></tr>
        <tr><td>divmod</td><td>enumerate</td><td>eval</td><td>exec</td><td>filter</td><td>float</td><td>format</td><td>frozenset</td></tr>
        <tr><td>getattr</td><td>globals</td><td>hasattr</td><td>hash</td><td>help</td><td>hex</td><td>id</td><td>input</td></tr>
        <tr><td>int</td><td>isinstance</td><td>issubclass</td><td>iter</td><td>len</td><td>list</td><td>locals</td><td>map</td></tr>
        <tr><td>max</td><td>memoryview</td><td>min</td><td>next</td><td>object</td><td>oct</td><td>open</td><td>ord</td></tr>
        <tr><td>pow</td><td>print</td><td>property</td><td>range</td><td>repr</td><td>reversed</td><td>round</td><td>set</td></tr>
        <tr><td>setattr</td><td>slice</td><td>sorted</td><td>staticmethod</td><td>str</td><td>sum</td><td>super</td><td>tuple</td></tr>
        <tr><td>type</td><td>vars</td><td>zip</td><td>__import__</td></tr>
        </table>
        
        If you accedently overwrite any of the built-in function (e.g. list), execute the following to bring built-in defition.
        ```python
        del(list)
        ```
        
        Similarly, avoid using special charcters and spaces in the column names of the DataFrames.
        Execute the following to remove special characters from the column names.
        ```python
        Data = mltk.clean_column_names(Data, replace='')
        ```
        
        ## MLToolkit Example
        
        ### Data Loading and exploration
        ```python
        import numpy as np
        import pandas as pd
        import mltk as mltk
        
        Data = pd.read_csv(r'incomedata.csv')
        Data = mltk.clean_column_names(Data, replace='')
        Data = mltk.add_identity_column(Data, id_label='ID', start=1, increment=1)
        DataStats = mltk.data_description(Data)
        ```
        ### Data Pre-processing and Feature Engineering
        ```python
        # Analyze Response Target
        print(mltk.variable_frequency(DataFrame=Data, variable='income'))
        
        # Set Target Variables
        targetVariable = 'HighIncome'
        targetCondition = "income=='>50K'" #For Binary Classification
        
        Data=mltk.set_binary_target(Data, target_condition=targetCondition, target_variable=targetVariable)
        print(mltk.variable_frequency(DataFrame=Data, variable=targetVariable))
        ```
        ```
                Counts  CountsFraction%
        income                         
        <=50K    24720         75.91904
        >50K      7841         24.08096
        TOTAL    32561        100.00000
        ```
        ```python
        # Flag Records to Exclude
        excludeCondition="age < 18"
        action = 'flag' # 'drop' #
        excludeLabel = 'EXCLUDE'
        Data=mltk.exclude_records(Data, exclude_ondition=excludeCondition, action=action, exclude_label=excludeLabel) # )#
        
        # Get list of uniques values in categorical variables
        categoryVariables = set({'sex', 'nativecountry', 'race', 'occupation', 'workclass', 'maritalstatus', 'relationship'})
        print(mltk.category_lists(Data, list(categoryVariables)))
        
        # Merge unique categorical values
        groups = [{'variable':'maritalstatus', 'group_name':'Married', 'values':["Married-civ-spouse", "Married-spouse-absent", "Married-AF-spouse"]}]
        Data = mltk.merge_categories(Data, groups)
        
        # Show Frequency distribution of categorical variable
        sourceVariable='maritalstatus'
        table = mltk.variable_frequency(Data, variable=sourceVariable, show_plot=False)
        table.style.background_gradient(cmap='Greens').set_precision(3)
        
        # Response Rate For Categorical Variables
        mltk.variable_responses(Data, variables=categoryVariables, target_variable=targetVariable, show_output=False, show_plot=True)
        ```
        
        ```python
        # Create Categorical Variables from continious variables
        sourceVariable='age'
        table = mltk.histogram(Data, sourceVariable, n_bins=10, orientation='vertical', show_plot=True)
        print(table)
        
        # Divide to categories
        labels = ['0', '20', '30', '40', '50', '60', 'INF']
        Data, groupVariable = mltk.numeric_to_category(DataFrame=Data, variable=sourceVariable, str_labels=labels, right_inclusive=True, print_output=False, return_variable=True)
        mltk.plot_variable_response(DataFrame=Data, variable=groupVariable, class_variable=targetVariable)
        ```
        ```
                    Counts  HighIncome  CountsFraction%  ResponseFraction%  ResponseRate%
        ageGRP                                                                           
        1_(0,20]      2410           2          7.40149            0.02551        0.08299
        2_(20,30]     8162         680         25.06680            8.67236        8.33129
        3_(30,40]     8546        2406         26.24612           30.68486       28.15352
        4_(40,50]     6983        2655         21.44590           33.86048       38.02091
        5_(50,60]     4128        1547         12.67774           19.72963       37.47578
        6_(60,INF)    2332         551          7.16194            7.02716       23.62779
        TOTAL        32561        7841        100.00000          100.00000            NaN
        ```
        
        ```python
        # Create One Hot Encoded Variables
        Data, featureVariables, targetVariable = mltk.to_one_hot_encode(Data, category_variables=categoryVariables, binary_variables=binaryVariables, target_variable=targetVariable)
        Data[identifierColumns+featureVariables+[targetVariable]].sample(5).transpose()
        ```
        ### Correlation
        ```python
        correlation=mltk.correlation_matrix(Data, featureVariables+[targetVariable], target_variable=targetVariable, method='pearson', return_type='list', show_plot=False)
        ```
        ### Split Train, Validate Test datasets
        ```python
        TrainDataset, ValidateDataset, TestDataset = mltk.train_validate_test_split(Data, ratios=(0.6,0.2,0.2))
        ```
        ### Model Building
        ```python
        sample_attributes = {'SampleDescription':'Adult Census Income Dataset',
                            'NumClasses':2,
                            'RecordIdentifiers':identifierColumns
                            }
        
        score_parameters = {'Edges':[0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0],
                           'Quantiles':10,
                           'ScoreVariable':'Probability',
                           'ScoreLabel':'Score',
                           'QuantileLabel':'Quantile'
                           }
        
        model_attributes = {'ModelID': None,   
                           'ModelName': 'IncomeLevel',
                           'Version':'0.1',
                           }
        ```
        
        Losgistic Regression
        ```python
        model_parameters = {'MLAlgorithm':'LGR', # 'RF', # 'DFF', # 'CNN', # 'CATBST', # 'XGBST'
                            'MaxIterations':50}  
        ```
        
        Random Forest
        ```python
        model_parameters = {'MLAlgorithm':'RF', # 'LGR', #  'DFF', # 'CNN', # 'CATBST', # 'XGBST'
                            'NTrees':500,
                           'MaxDepth':100,
                           'MinSamplesToSplit':10,
                           'Processors':2} 
        ```
        Neural Networks
        ```python
        # Setup Architecture
        # Binary classification (L1 'units': 2), 32 variables ('input_shape':(48,))
        SimpleDFF_architecture = {
                'L1':{'type': 'Dense', 'position':'input', 'units': 512, 'activation':'relu', 'input_shape':(48,)},
                'L2':{'type': 'Dense', 'position':'hidden', 'units': 512, 'activation':'relu'},
                'L3':{'type': 'Dropout', 'position':'hidden', 'rate':0.5},
                'L4':{'type': 'Dense', 'position':'output', 'units': 2, 'activation':'softmax', 'output_shape':None},
               }
        
        # Binary classification (L1 'units': 2), 32 variables ('input_shape':(32,))
        LogisticRegressionNN_architecture = {
                'L1':{'type': 'Dense', 'position':'input', 'units': 2, 'activation':'softmax', 'input_shape':(32,)},
               }
        
        # Binary classification (L8 'units': 2)
        SimpleImageClassifier_architecture = {
                'L1':{'type': 'Conv2D', 'position':'input', 'filters': 32, 'kernel_size':(3,3), 'strides':(1,1), 'padding':'valid', 'activation':'relu', 'input_shape':(128, 128, 1)},
                'L2':{'type': 'Conv2D', 'position':'hidden', 'filters': 64, 'kernel_size':(3,3), 'strides':(1,1), 'padding':'valid', 'activation':'relu'},
                'L3':{'type': 'MaxPooling2D', 'position':'hidden', 'pool_size': (2,2), 'padding':'valid'},   
                'L4':{'type': 'Dropout', 'position':'hidden', 'rate':0.25},
                'L5':{'type': 'Flatten', 'position':'hidden'},        
                'L6':{'type': 'Dense', 'position':'hidden', 'units': 128, 'activation':'relu'},
                'L7':{'type': 'Dropout', 'position':'hidden', 'rate':0.5},
                'L8':{'type': 'Dense', 'position':'output', 'units': 2, 'activation':'softmax', 'output_shape':None},
               }
        	   
        model_parameters = {'MLAlgorithm':'NN',
                            'BatchSize':512,
                           'InputShape':InputShape,
                           'num_classes':2,
                           'Epochs':10,
                           'metrics':['accuracy'],
                           'architecture':SimpleDFF_architecture} 
        ```
        CatBoost [avaiable in v0.1.5]
        ```python
        model_parameters = {'MLAlgorithm':'CBST',
                            'NTrees': 500,
                            'MaxDepth':10,
                            'LearningRate':0.7,
                            'LossFunction':'Logloss',#crossEntropy
                            'EvalMatrics':'Accuracy',
                            'Imbalanced':False,
                            'TaskType':'GPU',
                            'Processors':2,
                            'UseBestModel':True}
        
        CBSTModel = mltk.build_ml_model(TrainDataset, ValidateDataset, TestDataset, model_variables, targetVariable, 
                         model_attributes, sample_attributes, model_parameters, score_parameters, 
                                  return_model_object=True, show_results=False, show_plot=True)
        
        ```
        
        ### Build Model
        ```python
        RFModel = mltk.build_ml_model(TrainDataset, ValidateDataset, TestDataset, model_variables, targetVariable, 
                         model_attributes, sample_attributes, model_parameters, score_parameters, 
                                  return_model_object=True, show_results=False, show_plot=True)
        
        print(RFModel.model_attributes['ModelID'])
        print(RFModel.model_interpretation['ModelSummary'])
        print(RFModel.model_evaluation['AUC'])
        print(RFModel.model_evaluation['RobustnessTable'])
        
        RFModel.plot_eval_matrics(comparison=False)
        ```
        
        Save model
        ```python
        saveFilePath = '{}.pkl'.format(RFModel.get_model_id())
        mltk.save_model(RFModel, saveFilePath)
        
        ```
        
        ```
                  minProbability  maxProbability  meanProbability  BucketCount  ResponseCount  BucketFraction  ResponseFraction  BucketPrecision  CumulativeBucketFraction  CumulativeResponseFraction  CumulativePrecision
        Quantile                                                                                                                                                                                                           
        1                0.00000         0.00008      3.85729e-06          652            3         0.10011           0.00192          0.00460                   1.00000                     1.00000              0.23967
        2                0.00008         0.00432      1.52655e-03          651            9         0.09995           0.00577          0.01382                   0.89989                     0.99808              0.26582
        3                0.00435         0.02042      1.10941e-02          652           14         0.10011           0.00897          0.02147                   0.79994                     0.99231              0.29731
        4                0.02049         0.05702      3.58648e-02          650           20         0.09980           0.01281          0.03077                   0.69983                     0.98334              0.33677
        5                0.05711         0.12075      8.51409e-02          652           65         0.10011           0.04164          0.09969                   0.60003                     0.97053              0.38767
        6                0.12086         0.20457      1.63366e-01          651          109         0.09995           0.06983          0.16743                   0.49992                     0.92889              0.44533
        7                0.20469         0.31870      2.61577e-01          651          190         0.09995           0.12172          0.29186                   0.39997                     0.85906              0.51478
        8                0.31895         0.46840      4.03550e-01          666          259         0.10226           0.16592          0.38889                   0.30002                     0.73735              0.58905
        9                0.46854         0.66965      5.68083e-01          641          377         0.09842           0.24151          0.58814                   0.19776                     0.57143              0.69255
        10               0.66994         0.99967      8.06834e-01          647          515         0.09934           0.32992          0.79598                   0.09934                     0.32992              0.79598
        DataSet          0.00000         0.99967      2.33167e-01         6513         1561         1.00000           1.00000          0.23967                   1.00000                     1.00000              0.23967
        ```
        
        ### Evaluate Model
        
        ```python
        # Plot model performance curves
        RFModel.plot_eval_matrics(comparison=True)
        LGRModel.plot_eval_matrics(comparison=True)
        NNModel.plot_eval_matrics(comparison=True)
        CBSTModel.plot_eval_matrics(comparison=True)
        ```
        
        ```python
        TestDataset = mltk.score_processed_dataset(TestDataset, RFModel, edges=None, score_label=None, fill_missing=0)
        score_variable = RFModel.get_score_variable()
        score_label = RFModel.get_score_label()
        
        Robustnesstable = mltk.robustness_table(ResultsSet=TestDataset, class_variable=targetVariable, score_variable=score_variable,  score_label=score_label, show_plot=True)
        
        threshold = 0.8
        TestDataset = mltk.set_predicted_columns(TestDataset, score_variable, threshold=threshold)
        ConfusionMatrix = mltk.confusion_matrix(TestDataset, actual_variable=targetVariable, predcted_variable='Predicted', labels=[0,1], sample_weight=None, totals=True)
        print(ConfusionMatrix)
        ```
        
        Compare AUC [avaiable in v0.1.5]
        ```
        Models = [LGRModel, RFModel, CBSTModel, NNModel]
        ModelsComp = mltk.model_guages_comparison(Models)
        ModelsComp.style.background_gradient(cmap='RdYlGn').set_precision(3)
        ```
        
        Comparing Models and Probability Thresholds
        ```python
        Models = [LGRModel, RFModel, CBSTModel, NNModel]
        thresholds=[0.7, 0.8, 0.9]
        ConfusionMatrixComparison = mltk.confusion_matrix_comparison(TestDataset, Models, thresholds, score_variable=None, show_plot=True)
        ConfusionMatrixComparison.style.background_gradient(cmap='RdYlGn').set_precision(3)
        ```
        
        Comparing Models and Threshold Score (1-10 Scale) [avaiable in v0.1.5]
        ```python
        Models = [LGRModel, RFModel, CBSTModel, NNModel]
        thresholds=[7, 8, 9]
        ConfusionMatrixComparison = mltk.confusion_matrix_comparison(TestDataset, Models, thresholds, score_variable=score_label, show_plot=True)
        ConfusionMatrixComparison.style.background_gradient(cmap='RdYlGn').set_precision(3)
        ```
        
        ### Deployment
        Simplified MLToolkit ETL pipeline for scoring and model re-building (Need to customize based on the project).
        <img src="https://raw.githubusercontent.com/sptennak/MLToolkit/master/MLToolkit/image/MLTKServing.png" height="300">
        
        Define ETL Function
        ```python
        def ETL(DataFrame):
            # Add ID column
            DataFrame = mltk.add_identity_column(DataFrame, id_label='ID', start=1, increment=1)
            
            # Clean column names
            DataFrame = mltk.clean_column_names(DataFrame, replace='')
            input_columns = list(DataFrame.columns)
        
            # Excising valiables to model
            targetVariable = 'HighIncome'
            categoryVariables = ['sex', 'nativecountry', 'race', 'occupation', 'workclass', 'maritalstatus', 'relationship']
            binaryVariables = []
            
            # List to Create more Binary variables
            conditions = [{'bin_variable':'CapitalGainPositive', 'str_condition':"capitalgain>0"},
                          {'bin_variable':'CapitalLossPositive', 'str_condition':"capitalloss>0"}
                          ]
            
            # List to Create more Catergorical variables
            buckets = [{'variable':'age', 'str_labels':['0', '20', '30', '40', '50', '60', 'INF']},
                       {'variable':'educationnum', 'str_labels':['1', '4', '6', '8', '10', '13', '16']},
                       {'variable':'hoursperweek', 'str_labels':['0', '20', '40', '50', '60', '80', 'INF']}
                      ] 
            
            # List to Merge categorical values
            groups = [{'variable':'maritalstatus', 'group_name':'Married', 'values':["Married-civ-spouse", "Married-spouse-absent", "Married-AF-spouse"]}]
            
            DataFrame, categoryVariables, binaryVariables, targetVariable = mltk.setup_variables(DataFrame, target_variable=targetVariable, category_variables=categoryVariables, binary_variables=binaryVariables, conditions=conditions, buckets=buckets, groups=groups)
            
            # Create One Hot Encoded Variables
            DataFrame, featureVariables, targetVariable = mltk.to_one_hot_encode(DataFrame, category_variables=categoryVariables, binary_variables=binaryVariables, target_variable=targetVariable)
        
            return DataFrame, input_columns
        ```
        
        Scoring
        ```python
        MLModelObject = mltk.load_model(saveFilePath)
        SampleDataset = pd.read_csv(r'test.csv')
        SampleDataset = ETL(SampleDataset)
        
        SampleDataset = mltk.score_processed_dataset(SampleDataset, MLModelObject, edges=None, score_label=None, fill_missing=0)
        Robustnesstable1 = mltk.robustness_table(ResultsSet=SampleDataset, class_variable=targetVariable, score_variable=score_variable,  score_label=score_label, show_plot=True)
        ```
        
        ```python
        MLModelObject = mltk.load_model(saveFilePath)
        
        TestInput = """
        {
              "ID": "A001",
              "age": 32,
              "workclass": "Private",
              "education": "Doctorate",
              "education-num": 16,
              "marital-status": "Married-civ-spouse",
              "occupation": "Prof-specialty",
              "relationship": "Husband",
              "race": "Asian-Pac-Islander",
              "sex": "Feale",
              "capital-gain": 0,
              "capital-loss": 0,
              "hours-per-week": 40,
              "native-country": "?"
        }
        """
        output = mltk.score_records(TestInput, MLModelObject, edges=None, ETL=ETL, return_type='dict') # Other options for return_type, {'json', 'frame'}
        ```
        Output
        ```python
        [{'ID': 'A001',
          'age': 32,
          'capitalgain': 0,
          'capitalloss': 0,
          'education': 'Doctorate',
          'educationnum': 16,
          'hoursperweek': 40,
          'maritalstatus': 'Married',
          'nativecountry': '?',
          'occupation': 'Prof-specialty',
          'race': 'Asian-Pac-Islander',
          'relationship': 'Husband',
          'sex': 'Feale',
          'workclass': 'Private',
          'Probability': 0.7494862543903595,
          'Score': 8}]
        ```
        ### JSON Input for scoring
        
        Records Format for single or fewer number of records
        ```json
        [{
        	"ID": "A001",
        	"age": 32,
        	"workclass": "Private",
        	"education": "Doctorate",
        	"occupation": "Prof-specialty",
        	"sex": "Female",
        	"hoursperweek": 40,
        	"nativecountry": "USA"
        },]
        ```
        
        Split Format for mulltiple records
        ```json
        {
        	"columns":["ID","age","education","hoursperweek","nativecountry","occupation","sex","workclass"],
        	"data":[["A001",32,"Doctorate",40,"USA","Prof-specialty","Female","Private"],]
        }
        ```
        
        ## License
        ```
        Copyright 2019 Sumudu Tennakoon
        
        Licensed under the Apache License, Version 2.0 (the "License");
        you may not use this file except in compliance with the License.
        You may obtain a copy of the License at
        
            http://www.apache.org/licenses/LICENSE-2.0
        
        Unless required by applicable law or agreed to in writing, software
        distributed under the License is distributed on an "AS IS" BASIS,
        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
        See the License for the specific language governing permissions and
        limitations under the License.
        ```
        ## MLToolkit Project Timeline
        - 2018-07-02 [v0.0.1]: Initial set of functions for data exploration, model building and model evaluation was published to Github. (https://github.com/sptennak/MachineLearning).
        - 2018-01-03 [v0.0.2]: Created more functions for data exploration including web scraping and geo spacial data analysis for for IBM Coursera Data Science Capstone Project was published to Github. (https://github.com/sptennak/Coursera_Capstone).
        - 2019-03-20 [v0.1.0]: Developed and published initial version of model building and serving framework for IBM Coursera Advanced Data Science Professional Certificate Capstone Project. (https://github.com/sptennak/IBM-Coursera-Advanced-Data-Science-Capstone).
        - 2019-07-02 [v0.1.2]: First release of the PyMLToolkit Python package, a collection of clases and functions facilitating end-to-end machine learning model building and serving over RESTful API.
        - 2019-07-04 [v0.1.3]: Minor bug fixes.
        - 2019-07-14 [v0.1.4]: Improved documentation, Integrated TensorFlow Models, Enhancements and Minor bug fixes.
        - 2019-07-20 [v0.1.5(preview)]: Improved documentation, Integrated CatBoost Models, String Operations, Major Enhancements and Minor bug fixes.
        
        ## Future Release Plan
        - 2019-08-XX [v0.1.5]: Integrate CatBoost Models, , String Operations, Integrate image classification model Deployment, Enhancements and Minor bug fixes.
        - 2019-12-31 [v0.1.6]: Comprehensive documentation, Major bug-fix version of the initial release with some enhancements.
        - [v0.2.0]: Imporved model serving frameework, support more machine learning algorithms and deep learning.
        - [v0.3.0]: Imporved scalability and performance, Hyper parameter tuning, and Automated Machine Learning.
        - [v0.4.0]: Building continious learning models.
        
        ## References
        - https://pandas.pydata.org/
        - https://scikit-learn.org
        - https://www.numpy.org/
        - https://docs.python.org/3.6/library/re.html
        - https://www.statsmodels.org
        - https://matplotlib.org/
        - http://flask.pocoo.org/
        
Platform: UNKNOWN
Classifier: Development Status :: 3 - Alpha
Classifier: Environment :: Console
Classifier: Intended Audience :: Science/Research
Classifier: Intended Audience :: Education
Classifier: Intended Audience :: Developers
Classifier: License :: OSI Approved :: Apache Software License
Classifier: Operating System :: OS Independent
Classifier: Programming Language :: Python
Classifier: Operating System :: OS Independent
Classifier: Topic :: Scientific/Engineering
Classifier: Topic :: Software Development
Description-Content-Type: text/markdown
