python - 在python中打印变量

Question

我有这个 python 代码，它在一个类中设置 A 或 B。我想打印这个类收到的内容:

if options.A:
   print "setting A"
   class TmpClass(A): pass
else:
   print "nothing set in the command line => setting to B"
   class TmpClass(B): pass

print "selected=",TmpClass

我想在输出中看到 A 或 B，但我看到了:

selected= TmpClass

Answer 1

你的代码在做什么，翻译成英文是:

if option.A has a value that evaluates to True:
    define an empty class called "TmpClass" that inherits from the object called "A"
otherwise:
    define an empty class called "TmpClass" that inherits from the object called "B"

现在，如果代码实际执行的确实是您想要的，我猜测是您想要知道您的类是 A 类还是 B -based...如果我是对的，那么你最后想要的那一行是:

print('TmpClass inherits from : %s' % TmpClass.__bases__)

喂!