Are you referring to this study (FINAL REPORT
GENETIC CHARACTERIZATION OF POPULATIONS OF THE
NONINDIGENOUS BURMESE PYTHON IN EVERGLADES NATIONAL
PARK
Prepared by:
Timothy M. Collins and Barbie Freeman
Department of Biological Sciences
Florida International University
University Park
Miami Florida, FL 33199
And
Skip Snow
U.S. National Park Service
Everglades National Park
400l SR 9336
Homestead, FL 33034
Prepared for the South Florida Water Management District)

which sampled fewer than 200 specimens and concluded the following:

"The lack of genetic differentiation of
most Burmese Pythons in ENP may indicate either a panmictic freely interbreeding
population in the Park, or alternatively, limited genetic variation in the captive bred
populations that are the likely source of these snakes."

MAY being the operative word.

I would not regard this as definitive. Pretty inconclusive actually.

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