price-val-engine 0.1.6.dev1

last price revision validation rules

Price Validation Engine

Overview

Price Validation Engine is framework to create skeleton to validate last price revision

requirements

• python 3.6+
• Linux, MacOS, windows

install

pip install price-val-engine

Start Project

python -m price_val_engine startproject project_name 

Project template structure

- base_dir
    - project_name 
        - __init__.py
        - settings.py
        - validtion_rules.py
    - run.py

Run project

python run.py --input=input.csv --output=output.csv 

input as s3 csv file

python run.py --input=s3://bucket_name/path/input.csv --output=s3://bucket_name/path/input.csv

settings.py

• default validation pipeline

   VALIDATION_PIPELINES = [  
       'price_val_engine.core.validations.general_rules.NullNegativeZeroValidationRule',  
       'price_val_engine.core.validations.general_rules.OutOfRangeValidationRule',  
       'price_val_engine.core.validations.revision_rules.DeltaPercentageFromLastDayRule',  
   ]
  

Add new custom validation rule

- step 1 you can define your custom validtion rules in the file `project_name/validation_rules.py`

    class MyValidationRule(BaseRule)
        name = "validation_rules.myvalidation_rule"
        message = "price could not be gte {max_price}"
        severity = ''

        def is_valid(self, item):
            max_price = 50
            if item['price'] >= max_price:
                self.message.format(max_price)
                self.severity = 'HIGH' # you can define severity LOW, MEDIUM and HIGH

- step 2 add your newly defined rule in `setting.py`

    VALIDATION_PIPELINES = [  
        ...,
        'project_name.validation_rules.MyValidationRule
    ]