如果变量不是None并且大于一行中的某些内容，如何检入python？

How to check in python if variable is not None and greater than something in one line?

如何在一行中声明？

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if x is not None:
if x > 0:
pass

如果我只写"和"，如果没有则显示异常

1 2	if x is not None and x > 0: pass

相关讨论

也可以使用python三元运算符。在您的示例中，这可能对您有所帮助。您也可以进一步扩展相同的内容。

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#if X is None, do nothing
>>> x = ''
>>> x if x and x>0 else None
#if x is not None, print it
>>> x = 1
>>> x if x and x>0 else None
1

处理字符串值

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>>> x = 'hello'
>>> x if x and len(x)>0 else None
'hello'
>>> x = ''
>>> x if x and len(x)>0 else None
>>>