在大多数情况下,应避免打印,因为这可能会分散注意力(最好使用Out)。那是:
a # Out: 1
总是比
print(a) # prints: 1
print(x) # yes! (works same in python 2 and 3) print x # no! (python 2 only) print(x, y) # no! (works differently in python 2 and 3)
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