Reference summary list structure not accessed correctly in for loop

[jpilaul]

in lines https://github.com/tagucci/pythonrouge/blob/master/pythonrouge/pythonrouge.py#L159-L165, the for loop accesses references before individual summaries. You have:

for j, ref in enumerate(self.reference):
    for k, doc in enumerate(ref):

Since,

reference = [
[[summaryA_ref1_sent1, summaryA_ref1_sent2], [summaryA_ref2_sent1,  summaryA_ref2_sent2]], 
[[summaryB_ref1_sent1, summaryB_ref1_sent2], [summaryB_ref2_sent1, summaryB_ref2_sent2]]
]

your for loop should access summaries first such that:

for k, doc in enumerate(self.reference):
    for j, ref in enumerate(doc):