boto3 upload to s3 not giving errors, but files do not show up in bucket

Question

Just as the title says. Initially, I attempted using the sample code given from the docs linked below, with the exception that I passed my access key and secret key when creating the client object.  
  
https://boto3.amazonaws.com/v1/documentation/api/latest/guide/s3-uploading-files.html  
  
I was using driver code that printed the file name and 'success' when the function returned true. All files were being printed with 'success.' But when I checked my bucket, no uploads appeared.   
  
On the off chance it was something wrong in the function, I changed my code to just use

```
 response = s3_client.upload_file(file_name, bucket, file_name)
 ```

directly in the driver and without the rest of the function, still the code ran without errors, but no uploads appeared in my bucket.  
  
In the shell I logged in with the client and was able to successfully produce a list of my buckets, so I know it's connecting and the access keys are working in that sense.   
  
All I can think is maybe I'm missing some formatting thing with my bucket names? I'm just using the plain text name as a string, for example 'mybucket1234.' Do I need to give it the full url?  
  
Edited by: lwaxana on Feb 16, 2020 7:46 AM

Answer

I was having the same problem with code adapted from     
  
s3_client.upload_file completed without an exception but the file was not visible in the S3 web console or via "aws s3 ls s3://bucket-name"  
  
The issue was with these lines:

```
    if object_name is None:
        object_name = file_name
```

file_name is actually a file path and the upload seems to silently fail if it contains path separators. The workaround is either to always provide an object_name or change it to:

```
    if object_name is None:
        object_name = file_name.split(os.path.sep)[-1:][0]
```

boto3 upload to s3 not giving errors, but files do not show up in bucket

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