explicitly resetting io stream to start after pandas read.

[bk521234]

fixing broken assertion in list item 2 in issue #52 . This wont fix item 1 in #52, but it's a step closer to non-broken tests.

I ran nox and there are 2 broken tests instead of 3 after this update.

[thomasjohns]

Nice catch!

Would it make sense to maintain this invariant "higher up in the code"? E.g. possibly here

fables/fables/parse.py

Line 139 in 241df8e

yield from visitor_method(node)

after the parse/visit is finished we could do

node._stream.seek(0)

or

node.stream.seek(0)  # where I think the seek method is added to the StreamManager

. I wonder if test_node_stream_property_returns_at_byte_0_after_parse will fail for xlsx too? If so that would be another argument for the "higher up in the code" solution.