boto3 - AWS lambda -copy files between buckets - python-3.x

Question

I am trying to copy multiple files in a source bucket to a destination bucket using AWS lambda and am getting the error below. Bucket structures are as follows
Source Buckets
mysrcbucket/Input/daily/acctno_pin_xref/ABC_ACCTNO_PIN_XREF_FULL_20170926_0.csv.gz
mysrcbucket/Input/daily/acctno_pin_xref/ABC_ACCTNO_PIN_XREF_FULL_20170926_1.csv.gz
mysrcbucket/Input/daily/acctno_pin_xref/ABC_ACCTNO_PIN_XREF_count_20170926.inf
Destination Buckets
mydestbucket/Input/daily/acctno_pin_xref/ABC_ACCTNO_PIN_XREF_FULL_20170926_0.csv.gz
mydestbucket/Input/daily/acctno_pin_xref/ABC_ACCTNO_PIN_XREF_FULL_20170926_1.csv.gz
mydestbucket/Input/daily/acctno_pin_xref/ABC_ACCTNO_PIN_XREF_count_20170926.inf
I wrote the lambda function below but am getting the error below. Can someone help me explain what I am doing wrong
{ "errorMessage": "expected string or bytes-like object", "errorType": "TypeError", "stackTrace": [
[
"/var/task/lambda_function.py",
17,
"lambda_handler",
"s3.Object(dest_bucket,dest_key).copy_from(CopySource= { 'Bucket': obj.bucket_name , 'Key' : obj.key})"
],
[
"/var/runtime/boto3/resources/factory.py",
520,
"do_action",
"response = action(self, *args, **kwargs)"
],
[
"/var/runtime/boto3/resources/action.py",
83,
"__call__",
"response = getattr(parent.meta.client, operation_name)(**params)"
],
[
"/var/runtime/botocore/client.py",
312,
"_api_call",
"return self._make_api_call(operation_name, kwargs)"
],
[
"/var/runtime/botocore/client.py",
575,
"_make_api_call",
"api_params, operation_model, context=request_context)"
],
[
"/var/runtime/botocore/client.py",
627,
"_convert_to_request_dict",
"params=api_params, model=operation_model, context=context)"
],
[
"/var/runtime/botocore/hooks.py",
227,
"emit",
"return self._emit(event_name, kwargs)"
],
[
"/var/runtime/botocore/hooks.py",
210,
"_emit",
"response = handler(**kwargs)"
],
[
"/var/runtime/botocore/handlers.py",
208,
"validate_bucket_name",
"if VALID_BUCKET.search(bucket) is None:"
] ] }
Lambda Function Code
import boto3
import json
s3 = boto3.resource('s3')
def lambda_handler (event, context):
bucket = s3.Bucket('mysrcbucket')
dest_bucket=s3.Bucket('mydestbucket')
print(bucket)
print(dest_bucket)
for obj in bucket.objects.filter(Prefix='Input/daily/acctno_pin_xref/ABC_ACCTNO_PIN_XREF',Delimiter='/'):
dest_key=obj.key
print(dest_key)
s3.Object(dest_bucket,dest_key).copy_from(CopySource= { 'Bucket': obj.bucket_name , 'Key' : obj.key})

Answer 1

The issue is with:
s3.Object(dest_bucket, dest_key).copy_from(CopySource= {'Bucket': obj.bucket_name,
'Key': obj.key})
change dest_bucket to dest_bucket.name:
s3.Object(dest_bucket.name, dest_key).copy_from(CopySource= {'Bucket': obj.bucket_name,
'Key': obj.key})
dest_bucket is a resource and name is its identifier.