How to import pydal

[Luca]

I cloned pydal from github.  Then, from the directory where I cloned pydal, which is ~/work/WikiTrust2/data_interface, I tried to import it. 

However, I get an error: I can import DAL, but an import within pydal itself fails, probably because pydal does not know how to import its own modules due to Python 3 new import model. 

So my question is:  if I want to clone pydal from github as a submodule as part of a larger project, how do I then import pydal into the project? 

I am probably confused by the Python 3 import model (I was used to Python 2); can someone help me out? 

Many thanks, 

Luca

from pydal.pydal import DAL

---------------------------------------------------------------------------

ModuleNotFoundError                       Traceback (most recent call last)

<ipython-input-2-bd4ce315d283> in <module>

----> 1 from pydal.pydal import DAL

~/work/WikiTrust2/data_interface/pydal/pydal/__init__.py in <module>

      1 __version__ = '20190915.2'

      2

----> 3 from .base import DAL

      4 from .objects import Field

      5 from .helpers.classes import SQLCustomType

~/work/WikiTrust2/data_interface/pydal/pydal/base.py in <module>

    146 from .objects import Table, Field, Rows, Row, Set

    147 from .adapters.base import BaseAdapter, NullAdapter

--> 148 from .default_validators import default_validators

    149

    150 TABLE_ARGS = set(

~/work/WikiTrust2/data_interface/pydal/pydal/default_validators.py in <module>

     10 """

     11

---> 12 from . import validators

     13

     14 def default_validators(db, field):

~/work/WikiTrust2/data_interface/pydal/pydal/validators.py in <module>

     29 from functools import reduce

     30

---> 31 from pydal._compat import StringIO, integer_types, basestring, unicodeT, urllib_unquote, \

     32     unichr, to_bytes, PY2, to_unicode, to_native, string_types, urlparse, ipaddress

     33 from pydal.objects import Field, FieldVirtual, FieldMethod, Table

ModuleNotFoundError: No module named 'pydal._compat'