Inappropreate version comparison

[te-koyanagi]

Found a following inappropriate version comparison in base_model.py:

IS_PYTHON2 = sys.version_info.major == 2 or sys.version < '3'
IS_PYTHON35_UP = sys.version >= '3.5'

The versions cannot be compared by using the string equal operator.
For example, in case of sys.version = '3.10.6', sys.version >= '3.5' becomes False.
Because '1' of the third character of sys.version is less than '5'. But guess it intended to be True in this case.

In addition, often sys.version includes additional information, for example '3.10.6 (main, Nov 14 2022, 16:10:14) [GCC 11.3.0]'.

It should be replaced with a correction such as:

IS_PYTHON2 = sys.version_info.major < 3
IS_PYTHON35_UP = sys.version_info.major > 3 or (sys.version_info.major == 3 and sys.version_info.minor >= 5)

Thanks.

[te-koyanagi]

Workaround: Set a version manually, for example:

import sys
sys.version = "3.5"