formatter = "%r %r %r %r"print (formatter % (1, 2, 3, 4))print (formatter % ("one", "two", "three", "four"))print (formatter % (True, False, False, True))print (formatter % (formatter, formatter, formatter, formatter))print (formatter % (    "I had this thing.",    "That you could type up right.",    "But it didn't sing.",    "So I said goodnight."))

1 2 3 4

'one' 'two' 'three' 'four' True False False True '%r %r %r %r' '%r %r %r %r' '%r %r %r %r' '%r %r %r %r' 'I had this thing.' 'That you could type up right.' "But it didn't sing." 'So I said goodnight.'

知识在于点滴积累