invalid Syntax Error in python print statement using File - 


print('group output sizes: |a| = {}, |b| = {}'.format(len(a),len(b)),    file=stderr)                                                                              ^ syntaxerror: invalid syntax

can please error about? thought because of print syntax not think.

please help.

it looks trying use python 3 print syntax in python 2.

either use python 3 interpreter, or rewrite print so:

print >>sys.stderr, 'group output sizes: |a| = {}, |b| = {}'.format(len(a),len(b))

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