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如何在沙尔试验物体的类型?
原标题:How to test type of an object in Python?
  • 时间:2010-01-17 15:01:55
  •  标签:
  • python
  • types
import string
print string.ascii_lowercase # abcdefghijklmnopqrstuvwxyz
print type(string.ascii_lowercase) # <type  str >
print string.ascii_lowercase is str # False

是否应当使用<条码>。

最佳回答

<代码>is的操作者比较了两个物体的特性。 这是我相信的幕后情况:

id(string.ascii_lowercase) == id(str)

实际体积总是与“<代码>>>>>> > 代码/代码”不同,因此永远为<代码>。 False 。

这里是检验某些东西是否是一种扼杀的最残酷方式:

isinstance(string.ascii_lowercase, basestring)

这将与<代码>str和unicode strings匹配。

问题回答

使用:

>>> isinstance( dfab , str)
True

http://www.ohchr.org。

www.un.org/Depts/DGACM/index_spanish.htm 真正

The is keywordeck Object identity, not category.

您可能看到像<代码>foo”这样的代码,但常常认为<代码>None是一种类型。 <代码>None实际上是单一吨物体。

您希望<条码>类型(显示.ascii_downcase)是《?





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