tabix error due to pandas behavior in python 2.7

[daniel-munro]

When I run phaser_expr_matrix.py with the suggested python 2.7, I get this error for every line of the BED file:

[E::get_intv] Failed to parse TBX_GENERIC, was wrong -p [type] used?
The offending line was: "10	ENSRNOG00000033508	57185346	57238531	1|0	0|0 [...]

The column order is wrong because the pandas DataFrame is initialized with a dictionary. Pandas documentation says "column order follows insertion-order for Python 3.6 and later." When I run phaser_expr_matrix.py with python3, column order is correct and it runs fine.