How to use Boto3 to get the details of all classifiers available in AWS Glue Data catalog?

Problem Statement: Use boto3 library in Python to get details of all classifiers present in AWS Glue Data catalog. For example, get the details of all classifier from user’s account.

Approach/Algorithm to solve this problem

Step 1 − Import boto3 and botocore exceptions to handle exceptions.

Step 2 − There is no parameter.

Step 3 − Create an AWS session using boto3 library. Make sure region_name is mentioned in default profile. If it is not mentioned, then explicitly pass the region_name while creating the session.

Step 4 − Create an AWS client for glue.

Step 5 − Call get_classifiers.

Step 6 − It will fetch details of all classifier available in AWS Glue Data Catalog.

Step 7 − Handle the generic exception if something went wrong while checking the job.

Example

Use the following code to get the details of all classifiers present in AWS Glue Data catalog −

import boto3
from botocore.exceptions import ClientError

def get_all_classifier_details():
   session = boto3.session.Session()
   glue_client = session.client('glue')
   try:
      response = glue_client.get_classifiers()
      return response
   except ClientError as e:
      raise Exception("boto3 client error in get_all_classifier_details: " + e.__str__())
   except Exception as e:
      raise Exception("Unexpected error in get_all_classifier_details: " + e.__str__())

print(get_all_classifier_details())

Output

{'Classifiers': [
{'XMLClassifier': {'Name': 'aiml-linkup', 'Classification': 'xml',
'CreationTime': datetime.datetime(2020, 4, 17, 13, 26, 50,
tzinfo=tzlocal()), 'LastUpdated': datetime.datetime(2020, 4, 17, 13, 26,
50, tzinfo=tzlocal()), 'Version': 1, 'RowTag': 'job'}},
{'XMLClassifier': {'Name': 'aiml-test1', 'Classification': 'xml',
'CreationTime': datetime.datetime(2019, 10, 7, 20, 48, 44,
tzinfo=tzlocal()), 'LastUpdated': datetime.datetime(2019, 10, 7, 20, 48,
44, tzinfo=tzlocal()), 'Version': 1, 'RowTag': 'nitf'}},
{'GrokClassifier': {'Name': 'classifier1', 'Classification':
'classifier1', 'CreationTime': datetime.datetime(2018, 6, 21, 4, 7, 4,
tzinfo=tzlocal()), 'LastUpdated': datetime.datetime(2018, 6, 21, 4, 7,
11, tzinfo=tzlocal()), 'Version': 2, 'GrokPattern': 'SYSLOGTIMESTAMP
%{MONTH} +%{MONTHDAY} %{TIME}'}}, {'CsvClassifier': {'Name': 'csvquotes', 'CreationTime': datetime.datetime(2020, 9, 10, 5, 6, 29,
tzinfo=tzlocal()), 'LastUpdated': datetime.datetime(2020, 9, 10, 5, 6,
29, tzinfo=tzlocal()), 'Version': 1, 'Delimiter': ',', 'QuoteSymbol':
'"', 'ContainsHeader': 'UNKNOWN', 'DisableValueTrimming': False,
'AllowSingleColumn': False}},
{'XMLClassifier': {'Name': 'xml-test', 'Classification': 'xml',
'CreationTime': datetime.datetime(2020, 4, 10, 18, 26, 50,
tzinfo=tzlocal()), 'LastUpdated': datetime.datetime(2020, 4, 15, 0, 3,
8, tzinfo=tzlocal()), 'Version': 2, 'RowTag': 'job'}}],
'ResponseMetadata': {'RequestId': '7fa7a78e-…………e4261bfd1',
'HTTPStatusCode': 200, 'HTTPHeaders': {'date': 'Sun, 21 Feb 2021
08:02:30 GMT', 'content-type': 'application/x-amz-json-1.1', 'contentlength': '885', 'connection': 'keep-alive', 'x-amzn-requestid':
'7fa7a78e-……………..e4261bfd1'}, 'RetryAttempts': 0}}