Sort lambda functions by invocations

get_all_lambda_invocation_stats.py

import sys
import boto3
import datetime
 
cw = boto3.client('cloudwatch')
 
list_metrics_paginator = cw.get_paginator('list_metrics')
 
function_stats = []
for page in list_metrics_paginator.paginate(Namespace='AWS/Lambda', MetricName='Invocations'):
    for metric in page['Metrics']:
        if not len(metric['Dimensions']) == 1:
            continue
        function_name = next(
            iter([
                x['Value']
                for x in metric['Dimensions']
                if x['Name'] == 'FunctionName'
            ])
        )
        sys.stdout.write('.')
        sys.stdout.flush()
        stats_args = {**metric, **{
            'StartTime': datetime.datetime.utcnow() - datetime.timedelta(hours=1),
            'EndTime': datetime.datetime.utcnow(),
            'Period': 60*60,
            'Statistics': ['Sum']
        }}
        stats = cw.get_metric_statistics(**stats_args)
        sum = int(next(iter(stats['Datapoints'] or [{'Sum': 0}]))['Sum'])
        function_stats.append(
            {'FunctionName': function_name, 'Invocations': sum})
 
print('')
 
for function in sorted(function_stats, key=lambda function: function['Invocations']):
    print(function)