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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Python 3.4.3 Geoalchemy Error","articleBody":"Attempting to install odm2api on a CentOS 7 machine that is running Python 3.4.3 using the source code from the [python 3.x compatibility](https://github.com/ODM2/ODM2PythonAPI/pull/58) pull request.  While the odm2api installs fine, it is dependent on **geoalchemy** which raises the following ImportError:\n\n```\n\u003e\u003e\u003e import odm2api\nutils imported\nTraceback (most recent call last):\n  File \"\u003cstdin\u003e\", line 1, in \u003cmodule\u003e\n  File \"/usr/lib/python3.4/site-packages/odm2api/__init__.py\", line 1, in \u003cmodule\u003e\n    from odm2api.ODMconnection import SessionFactory, dbconnection\n  File \"/usr/lib/python3.4/site-packages/odm2api/ODMconnection.py\", line 6, in \u003cmodule\u003e\n    from .ODM2.models import Variables as Variable2, setSchema\n  File \"/usr/lib/python3.4/site-packages/odm2api/ODM2/models.py\", line 7, in \u003cmodule\u003e\n    from geoalchemy import GeometryDDL, GeometryColumn\n  File \"/usr/lib64/python3.4/site-packages/geoalchemy/__init__.py\", line 2, in \u003cmodule\u003e\n    from geoalchemy.base import *\n  File \"/usr/lib64/python3.4/site-packages/geoalchemy/base.py\", line 7, in \u003cmodule\u003e\n    from utils import from_wkt\nImportError: cannot import name 'from_wkt'\n```\n\nThis is documented as geoalchemy issue [#41](https://github.com/geoalchemy/geoalchemy/issues/41) and a [pull request](https://github.com/geoalchemy/geoalchemy/pull/42) was created to fix this in November 2015, but hasn't been touched since January 2016.\n\n---\n\nHere is the suggested fix from [#41](https://github.com/geoalchemy/geoalchemy/issues/41)\n\n\u003e In base.py change\n\u003e \n\u003e ```\n\u003e from utils import ...\n\u003e from functions import ...\n\u003e ```\n\u003e \n\u003e to\n\u003e \n\u003e ```\n\u003e from geoalchemy.utils import ...\n\u003e from geoalchemy.functions import ...\n\u003e ```\n\u003e \n\u003e In base.py change any mention of `ColumnProperty.ColumnComparator` to `ColumnProperty.Comparator`\n\u003e \n\u003e In geometry.py replace any calls to the `has_key` method with the corresponding 'in' expression.\n","author":{"url":"https://github.com/Castronova","@type":"Person","name":"Castronova"},"datePublished":"2016-04-19T23:13:43.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":9},"url":"https://github.com/59/ODM2PythonAPI/issues/59"}