Deleting only rows

[jurasofish]

Is it possible to delete only rows and not any columns? Looking at the code it appears to assume the deleteColumns key is present. Would be super easy to modify, hmu if you want a pull request.

resource = {
    "oauth2": creds,
    "documentId": copy_id,
    "tableIndex": 0,
    "deleteRows": [3],
    "deleteColumns": []
}
res = gdoctableapp.DeleteRowsAndColumns(resource)
print(res)  # You can see the retrieved responses from Docs API.

Traceback (most recent call last):
  File "/Applications/PyCharm CE.app/Contents/helpers/pydev/_pydevd_bundle/pydevd_exec2.py", line 3, in Exec
    exec(exp, global_vars, local_vars)
  File "<string>", line 8, in <module>
  File "/opt/miniconda3/envs/templating/lib/python3.7/site-packages/gdoctableapppy/gdoctableapp.py", line 38, in DeleteRowsAndColumns
    return gdoctableapp(resource).deleteRowsAndColumns()
  File "/opt/miniconda3/envs/templating/lib/python3.7/site-packages/gdoctableapppy/gdoctableapp.py", line 728, in deleteRowsAndColumns
    self.__deleteRowsAndColumnsMain()
  File "/opt/miniconda3/envs/templating/lib/python3.7/site-packages/gdoctableapppy/gdoctableapp.py", line 356, in __deleteRowsAndColumnsMain
    maxDeleteCols = max(self.obj["params"]["deleteColumns"]) + 1
ValueError: max() arg is an empty sequence

resource = {
    "oauth2": creds,
    "documentId": copy_id,
    "tableIndex": 0,
    "deleteRows": [3]
}
res = gdoctableapp.DeleteRowsAndColumns(resource)
print(res)  # You can see the retrieved responses from Docs API.

Traceback (most recent call last):
  File "/Applications/PyCharm CE.app/Contents/helpers/pydev/_pydevd_bundle/pydevd_exec2.py", line 3, in Exec
    exec(exp, global_vars, local_vars)
  File "<string>", line 7, in <module>
  File "/opt/miniconda3/envs/templating/lib/python3.7/site-packages/gdoctableapppy/gdoctableapp.py", line 38, in DeleteRowsAndColumns
    return gdoctableapp(resource).deleteRowsAndColumns()
  File "/opt/miniconda3/envs/templating/lib/python3.7/site-packages/gdoctableapppy/gdoctableapp.py", line 728, in deleteRowsAndColumns
    self.__deleteRowsAndColumnsMain()
  File "/opt/miniconda3/envs/templating/lib/python3.7/site-packages/gdoctableapppy/gdoctableapp.py", line 356, in __deleteRowsAndColumnsMain
    maxDeleteCols = max(self.obj["params"]["deleteColumns"]) + 1
KeyError: 'deleteColumns'