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Traceback (most recent call last):
  File "/home/mdipierro/web2py/gluon/restricted.py", line 219, in restricted
    exec(ccode, environment)
  File "/home/mdipierro/web2py/applications/demo_app1/controllers/default.py", line 78, in <module>
  File "/home/mdipierro/web2py/gluon/globals.py", line 421, in <lambda>
    self._caller = lambda f: f()
  File "/home/mdipierro/web2py/applications/demo_app1/controllers/default.py", line 40, in user
    return dict(form=auth())
  File "/home/mdipierro/web2py/gluon/tools.py", line 1801, in __call__
    return getattr(self, args[0])()
  File "/home/mdipierro/web2py/gluon/tools.py", line 2977, in register
    hideerror=self.settings.hideerror):
  File "/home/mdipierro/web2py/gluon/sqlhtml.py", line 1989, in accepts
    self.vars.id = self.table.insert(**fields)
  File "/home/mdipierro/web2py/gluon/packages/dal/pydal/objects.py", line 762, in insert
    ret = self._db._adapter.insert(self, row.op_values())
  File "/home/mdipierro/web2py/gluon/packages/dal/pydal/adapters/base.py", line 480, in insert
    query = self._insert(table, fields)
  File "/home/mdipierro/web2py/gluon/packages/dal/pydal/adapters/base.py", line 476, in _insert
    ','.join(self.expand(v, f.type) for f, v in fields))
  File "/home/mdipierro/web2py/gluon/packages/dal/pydal/adapters/base.py", line 476, in <genexpr>
    ','.join(self.expand(v, f.type) for f, v in fields))
  File "/home/mdipierro/web2py/gluon/packages/dal/pydal/adapters/base.py", line 445, in _expand
    rv = self.represent(expression, field_type)
  File "/home/mdipierro/web2py/gluon/packages/dal/pydal/adapters/base.py", line 382, in represent
    return super(SQLAdapter, self).represent(obj, field_type)
  File "/home/mdipierro/web2py/gluon/packages/dal/pydal/adapters/base.py", line 336, in represent
    return self.representer.represent(obj, field_type)
  File "/home/mdipierro/web2py/gluon/packages/dal/pydal/representers/__init__.py", line 251, in represent
    rv = self.get_representer_for_type(field_type)(rv, field_type)
  File "/home/mdipierro/web2py/gluon/packages/dal/pydal/representers/__init__.py", line 209, in _default
    return self.adapt(value)
  File "/home/mdipierro/web2py/gluon/packages/dal/pydal/representers/__init__.py", line 227, in adapt
    value = str(value)
  File "/home/mdipierro/web2py/gluon/packages/dal/pydal/validators.py", line 2890, in __str__
    hashed = simple_hash(self.password, key, salt, digest_alg)
  File "/home/mdipierro/web2py/gluon/packages/dal/pydal/validators.py", line 2813, in simple_hash
    int(keylen), get_digest(alg)))
  File "/home/mdipierro/web2py/gluon/packages/dal/pydal/validators.py", line 2796, in pbkdf2_hex
    hmac = hashlib.pbkdf2_hmac(hashfunc().name, to_bytes(data),
AttributeError: 'module' object has no attribute 'pbkdf2_hmac'