>>> wks.rows
982
>>> wks.add_rows(1)
Traceback (most recent call last):
  File "<input>", line 1, in <module>
  File "C:\Python27\lib\site-packages\pygsheets\worksheet.py", line 479, in add_rows
    self.resize(rows=self.rows + rows, cols=self.cols)
  File "C:\Python27\lib\site-packages\pygsheets\worksheet.py", line 472, in resize
    self.link()
  File "C:\Python27\lib\site-packages\pygsheets\worksheet.py", line 134, in link
    self.client.update_sheet_properties(self.spreadsheet.id, self.jsonSheet['properties'])
  File "C:\Python27\lib\site-packages\pygsheets\client.py", line 336, in update_sheet_properties
    return self.sh_batch_update(spreadsheet_id, request, None, batch)
  File "C:\Python27\lib\site-packages\pygsheets\client.py", line 409, in sh_batch_update
    return self._execute_request(spreadsheet_id, final_request, batch)
  File "C:\Python27\lib\site-packages\pygsheets\client.py", line 421, in _execute_request
    response = request.execute()
  File "C:\Python27\lib\site-packages\oauth2client\_helpers.py", line 133, in positional_wrapper
    return wrapped(*args, **kwargs)
  File "C:\Python27\lib\site-packages\googleapiclient\http.py", line 844, in execute
    raise HttpError(resp, content, uri=self.uri)
HttpError: <HttpError 400 when requesting https://sheets.googleapis.com/v4/spreadsheets/1hm8hqmOU0auL4CKTvzpSLhtabDK9Yd5aDPF_XQHvRqk:batchUpdate?alt=json returned "Invalid requests[0].updateSheetProperties: You are trying to edit a protected cell or object. Please contact the spreadsheet owner to remove protection if you need to edit.">
>>> wks.rows
983