问题
As stated in the title, I found that (1) and (1,) are different. But what's the difference of them?
In[39]: (1) == (1,)
Out[39]: False
回答1:
The comma makes it a tuple. (1) is just the same as 1 wrapped in delimiters.
回答2:
Try this to convince yourself:
>>> type((1))
<type 'int'>
>>> type((1,))
<type 'tuple'>
The following identity checks may provide you with further insight into the differences:
>>> (1) is 1
True
>>> (1,) is 1
False
来源：https://stackoverflow.com/questions/37312512/whats-the-difference-between-1-and-1-in-python