TypeError when generating Kinesis event

[phoenik]

Description: TypeError occurs when generating a Kinesis event.
TypeError: Object of type bytes is not JSON serializable

Steps to reproduce the issue:

1. Run sam local generate-event kinesis

Observed result:

Traceback (most recent call last):
  File "/Users/redacted/Library/Python/3.7/bin/sam", line 11, in <module>
    sys.exit(cli())
  File "/Users/redacted/Library/Python/3.7/lib/python/site-packages/click/core.py", line 722, in __call__
    return self.main(*args, **kwargs)
  File "/Users/redacted/Library/Python/3.7/lib/python/site-packages/click/core.py", line 697, in main
    rv = self.invoke(ctx)
  File "/Users/redacted/Library/Python/3.7/lib/python/site-packages/click/core.py", line 1066, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/Users/redacted/Library/Python/3.7/lib/python/site-packages/click/core.py", line 1066, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/Users/redacted/Library/Python/3.7/lib/python/site-packages/click/core.py", line 1066, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/Users/redacted/Library/Python/3.7/lib/python/site-packages/click/core.py", line 895, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/Users/redacted/Library/Python/3.7/lib/python/site-packages/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "/Users/redacted/Library/Python/3.7/lib/python/site-packages/click/decorators.py", line 64, in new_func
    return ctx.invoke(f, obj, *args[1:], **kwargs)
  File "/Users/redacted/Library/Python/3.7/lib/python/site-packages/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "/Users/redacted/Library/Python/3.7/lib/python/site-packages/samcli/commands/local/generate_event/kinesis/cli.py", line 36, in cli
    do_cli(ctx, region, partition, sequence, data)  # pragma: no cover
  File "/Users/redacted/Library/Python/3.7/lib/python/site-packages/samcli/commands/local/generate_event/kinesis/cli.py", line 47, in do_cli
    event = json.dumps(event_dict, indent=4)
  File "/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/json/__init__.py", line 238, in dumps
    **kw).encode(obj)
  File "/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/json/encoder.py", line 201, in encode
    chunks = list(chunks)
  File "/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/json/encoder.py", line 431, in _iterencode
    yield from _iterencode_dict(o, _current_indent_level)
  File "/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/json/encoder.py", line 405, in _iterencode_dict
    yield from chunks
  File "/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/json/encoder.py", line 325, in _iterencode_list
    yield from chunks
  File "/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/json/encoder.py", line 405, in _iterencode_dict
    yield from chunks
  File "/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/json/encoder.py", line 405, in _iterencode_dict
    yield from chunks
  File "/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/json/encoder.py", line 438, in _iterencode
    o = _default(o)
  File "/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/json/encoder.py", line 179, in default
    raise TypeError(f'Object of type {o.__class__.__name__} '
TypeError: Object of type bytes is not JSON serializable

Expected result:
Default event json output.

Additional environment details (Ex: Windows, Mac, Amazon Linux etc)
Mac 10.13.6
Python 3.6, Python 3.7

Output of sam --version:
SAM CLI, version 0.5.0
and
SAM CLI, version 0.4.0

Optional Debug logs:

Add --debug flag to command you are running

Additional Details:
commands/local/generate_event/kinesis/cli.py:45
date_base64 = base64.urlsafe_b64encode(data.encode('utf8'))
This returns a b'' (byte) type which cannot be serialized by json.dump changing the line to
date_base64 = base64.urlsafe_b64encode(data.encode('utf8')).decode('utf-8') fixes the issue.

[jfuss]

This issues has been addressed as part of the update to generate-event and in a wider scope than just the Kinesis event.

Marking this as waiting for release.

[jfuss]

Closing this as it was released in 0.6.0