lis打印结果中的一些异常

Question

嗨，我有两个单子剪和短语。我试着用两种不同的方式来运行它们。我原以为他们会给出相同的结果，但他们给出的结果不同。怎么会这样？你知道吗

snip = ['Hi john', 'Hi sam', 'Hi lila']
phras = ['lets play','lets paint']
for s in snip,phras:
     result = s[:]

print result   # output is ['lets play', 'lets paint']

# Now lets run again

snip = ['Hi john', 'Hi sam', 'Hi lila']
phras = ['lets play','lets paint']
for s in snip,phras:
     result = s[:]
     print result

#output is ['Hi john', 'Hi sam', 'Hi lila']
#          ['lets play','lets paint']

Answer 1

print语句在第一个循环之外，因此它只显示分配给result的最后一个值，而第二个print语句在循环内部，因此打印result的每个值