def getPrice_from_API()

in get-ec2-pricing/app.py [0:0]

• 61 lines of code
• 7 McCabe index (conditional complexity)

def getPrice_from_API(oper_sys, instance_type, region, term_type):
    try:
        pricing = boto3.client('pricing', region_name='us-east-1')
        logger.info("instance: {}".format(instance_type))
        searchFilters=[                    
                {
                    'Type':'TERM_MATCH',
                    'Field':'tenancy',
                    'Value':'Shared'
                },
                {
                    'Type':'TERM_MATCH',
                    'Field':'location',
                    'Value':region_lookup(region)
                },
                {
                    'Type':'TERM_MATCH',
                    'Field':'operatingSystem',
                    'Value':oper_sys
                },
                {
                    'Type':'TERM_MATCH',
                    'Field':'preInstalledSw',
                    'Value':'NA'
                },
                {
                    'Type':'TERM_MATCH',
                    'Field':'termType',
                    'Value': term_type
                },
                {'Type' :'TERM_MATCH', 'Field':'capacityStatus', 'Value':'Used'},
                {
                    'Type':'TERM_MATCH',
                    'Field':'instanceType',
                    'Value': instance_type
                }
        ]
        #windows adds an extra license filter
        if 'Windows' in oper_sys:
            searchFilters.append({"Type":"TERM_MATCH", "Field": "licenseModel", "Value": "No License required"})
        response = pricing.get_products(
            ServiceCode='AmazonEC2',        # required
            Filters = searchFilters,
            FormatVersion='aws_v1',        # optional
            NextToken='',                  # optional
            MaxResults=20                   # optional
        )
        if len(response['PriceList']) > 1 :
            logger.info("Pricing list has more than one entry, considering first entry")
        elif len(response['PriceList']) == 0 :
            logger.info("Couldn't query pricing with given filters")
        resp_json = json.loads(response['PriceList'][0])
        price = 0
        for key, value in resp_json['terms'][term_type].items():
            logger.info("Reading Price for termType {}, key {}".format(term_type,key))
            for dimkey, dimValue in value['priceDimensions'].items():
                logger.info("Reading Price for dimension key {}".format(dimkey))
                price = dimValue['pricePerUnit']['USD']
        return Decimal(price)
    except Exception as e:
        print(e)
        raise e