Python version mismatch

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I call: load("secp256k1.sage" where secp256k1.sage is from Bitcoin sources. I obtain:

  Traceback (most recent call last):

  File "/home/andrzej/SageMath/local/lib/python3.8/site-packages/IPython/core/interactiveshell.py", line 3331, in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)

  File "<ipython-input-3-6446b3e63292>", line 1, in <module>
    load("secp256k1.sage")

  File "sage/misc/persist.pyx", line 143, in sage.misc.persist.load (build/cythonized/sage/misc/persist.c:2558)
    sage.repl.load.load(filename, globals())

  File "/home/andrzej/SageMath/local/lib/python3.8/site-packages/sage/repl/load.py", line 272, in load
    exec(preparse_file(f.read()) + "\n", globals)

  File "<string>", line 6, in <module>

  File "sage/misc/persist.pyx", line 143, in sage.misc.persist.load (build/cythonized/sage/misc/persist.c:2558)
    sage.repl.load.load(filename, globals())

  File "/home/andrzej/SageMath/local/lib/python3.8/site-packages/sage/repl/load.py", line 272, in load
    exec(preparse_file(f.read()) + "\n", globals)

  File "<string>", line 178
    print "Formula %s on Z%i:" % (name, p)
          ^
SyntaxError: invalid syntax

It uses python3.8 and print statement from Python 2.x