python print

python

https://blog.csdn.net/funnyPython/article/details/78141649

TypeError: sequence item 0: expected str instance, int found

小例子:

a = ['1','2','3',1]

print(' '.join(a))

以为会打印 1 2 3 1 
结果报了错

Traceback (most recent call last):

File "C:/Users/Administrator/Desktop/onetest.py", line 188, in <module>

print(' '.join(a))

TypeError: sequence item 3: expected str instance, int found

上网查了资料,说list包含数字,不能直接转化成字符串。 
解决办法:

print(" ".join('%s' %id for id in list1))

即遍历list的元素,把他转化成字符串。这样就能成功输出1 2 3 1了。

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