Python - provider argument dict keys changed to lower-case with underscores

[jantman]

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cdktf & Language Versions

cdktf-cli 0.15.5 Python 3.10.9 / cdktf 0.15.5

Affected Resource(s)

Grafana provider

Expected Behavior

Dictionary key arguments would be passed to provider configuration as specified.

Actual Behavior

Dictionary key arguments are lower-cased and have dashes converted to underscores, breaking them.

Steps to Reproduce

1. Install cdktf latest version (0.15.5), generate bindings for grafana/grafana@~> 1.35 provider.
2. Configure the provider with the http_headers argument, such as:

GrafanaProvider(
    self, 'grafana', org_id=1, http_headers={'X-Disable-Provenance': 'disabled'}
)

3. The resulting synth'ed JSON has a header of x_disable_provenance instead of X-Disable-Provenance, which doesn't work with the underlying application.

  "provider": {
    "grafana": [
      {
        "http_headers": {
          "x_disable_provenance": "disabled"
        },
        "insecure_skip_verify": true,
        "org_id": 1,
        "url": "http://nuc1:3000/"
      }
    ]
  },

Important Factoids

This can currently be worked around with the add_override escape hatch.

References

It looks to me like this is related to #235 and #646 but I don't understand enough about the internals to really understand what's going on or why it works this way.