errors when installing mariadb python on macos

pip install mariadb

• works just fine
  python -c "import mariadb"
  Traceback (most recent call last):
  File "<string>", line 1, in <module>
  ImportError: dlopen(/miniconda3/lib/python3.7/site-packages/mariadb.cpython-37m-darwin.so, 2): Symbol not found: _iconv
  Referenced from: /miniconda3/lib/python3.7/site-packages/mariadb.cpython-37m-darwin.so
  Expected in: flat namespace
  in /miniconda3/lib/python3.7/site-packages/mariadb.cpython-37m-darwin.so

what is happening here?