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        ValueError:Python2.6.6 格式中的零长度字段名称

        ValueError: zero length field name in format in Python2.6.6(ValueError:Python2.6.6 格式中的零长度字段名称)
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                • 本文介绍了ValueError:Python2.6.6 格式中的零长度字段名称的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                  问题描述

                  我使用这个 python shell 来生成一个字符串:

                  I use this python shell to generate a string:

                  >>>':'.join("{:x}
                  ".format(random.randint(0, 2**16 - 1)) for i in range(4))
                  

                  当我在 Python2.7.5 中运行这个 shell 时,一切正常.但是当 Python 版本为 2.6.6 时会发生 ValueError: zero length field name in format.当 Python 版本为 2.6.6 时,我应该怎样运行这个 shell?

                  When I run this shell in Python2.7.5, everything goes okay. But it occurs ValueError: zero length field name in format when Python version is 2.6.6. What should I run this shell fine when Python version is 2.6.6?

                  推荐答案

                  在 Python 2.6 或更早的版本中,您需要显式地为格式字段编号:

                  In Python versions 2.6 or earlier, you need to explicitly number the format fields:

                  ':'.join("{0:x}
                  ".format(random.randint(0, 2**16 - 1)) for i in range(4))
                  #          ^
                  

                  您可以在 docs 中阅读相关内容:

                  You can read about this in the docs:

                  在 2.7 版中更改:位置参数说明符可以省略,因此 '{} {}' 等效于 '{0} {1}'.

                  Changed in version 2.7: The positional argument specifiers can be omitted, so '{} {}' is equivalent to '{0} {1}'.

                  这篇关于ValueError:Python2.6.6 格式中的零长度字段名称的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

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