def handler()

in ec2-spot-price-monitoring-with-lambda/ec2-spot-price-monitoring.py [0:0]
35 lines of code
5 McCabe index (conditional complexity)

def handler(event, context):
  print('Loading function.')
  now = datetime.utcnow()
  ec2Client = boto3.client('ec2')
  cwClient = boto3.client('cloudwatch')
  response = ec2Client.describe_spot_instance_requests(Filters=[{'Name':'state', 'Values': ['active'], 'Name': 'status-code', 'Values': ['fulfilled']}])
  instances = response['SpotInstanceRequests']
  for i in instances:
    response = ec2Client.describe_spot_price_history(StartTime=now,EndTime=now,InstanceTypes=[i['LaunchSpecification']['InstanceType']],AvailabilityZone=i['LaunchedAvailabilityZone'],ProductDescriptions=[i['ProductDescription']])
    pricehistory = response['SpotPriceHistory']
    if pricehistory == []:
      response = ec2Client.describe_spot_price_history(StartTime=now,EndTime=now,InstanceTypes=[i['LaunchSpecification']['InstanceType']],AvailabilityZone=i['LaunchedAvailabilityZone'],ProductDescriptions=[i['ProductDescription']+' (Amazon VPC)'])
      pricehistory = response['SpotPriceHistory']
    try:
      response = ec2Client.create_tags(Resources=[i['InstanceId']],Tags=[{'Key':'EC2 Spot Market Price', 'Value': pricehistory[0]['SpotPrice']}])
    except:
      print('Unable to create tag for InstanceId:', i['InstanceId'])
    try:
      response = ec2Client.create_tags(Resources=[i['InstanceId']],Tags=[{'Key':'EC2 Spot Bid Price', 'Value': i['SpotPrice']}])
    except:
      print('Unable to create tag for InstanceId:', i['InstanceId'])
    for t in i['Tags']:
      if t['Key'] == 'aws:ec2spot:fleet-request-id':
        try:
          cwClient.put_metric_data(Namespace='EC2 Spot Instance Pricing',MetricData=[{'MetricName': 'Hourly Price','Dimensions': [{'Name': 'FleetRequestId','Value': t['Value']}],'Timestamp': now,'Value': float(pricehistory[0]['SpotPrice'])}])
          cwClient.put_metric_data(Namespace='EC2 Spot Instance Pricing',MetricData=[{'MetricName': 'Hourly Price','Dimensions': [{'Name': 'FleetRequestId','Value': t['Value']}, {'Name': 'InstanceId','Value': i['InstanceId']}],'Timestamp': now,'Value': float(pricehistory[0]['SpotPrice'])}])
        except:
          print('Unable to put custom metric for FleetRequestId:', t['Value'])
      else:
        try:
          cwClient.put_metric_data(Namespace='EC2 Spot Instance Pricing',MetricData=[{'MetricName': 'Hourly Price','Dimensions': [{'Name:': 'InstanceId','Value': i['InstanceId']}],'Timestamp': now,'Value': float(pricehistory[0]['SpotPrice'])}])
        except:
          print('Unable to put custom metrick for InstanceId:', i['InstanceId'])
  print('Function complete.')
  return('complete')