Python:Typeerror:传递给 object.__format__ 的非空格式字符串 [英] Python : Typeerror : Non-empty format string passed to object.__format__

问题描述

我知道有人问过这个问题这里 但该解决方案对我不起作用.我正在使用 python 3.4.

I know this question has been asked here but the solution does not work for me. I am using python 3.4.

我的脚本中有以下格式:

I have the following formatting in my script :

print ( "\t {0:20} {1:<11} {2:<25} {3:11} {4:11} {5:>32}".format( files.name.split('/')[-1], sizeof_fmt(files.size),
                                                                          str( formatted_timestamp ), files.owner,
                                                                          files.version_id, files.etag ))

这适用于 python 2.7.x.但是在 3.4 中我得到错误:

This works in python 2.7.x. But in 3.4 I get the error:

File "test.py", line 3, in file_print
      versionid, etag ))
TypeError: non-empty format string passed to object.__format__

我试过了:

print ( "\t {0:20} {1:<11} {2:<25} {3:11} {!s4:11s} {!s5:>32s}".format( files.name.split('/')[-1], sizeof_fmt(files.size),
                                                                          str( formatted_timestamp ), files.owner,
                                                                          files.version_id, files.etag ))

但我仍然遇到同样的错误.我什至将 versionid 和 etag 转换为字符串并最终得到相同的错误.有人可以向我解释一下吗?

But I still get the same error. I even converted the versionid and etag to strings and end up getting the same error. Can someone explain this to me?

Etag 看起来像这样 9893532233caff98cd083a116b013c0b，versionid 是 None

Etag look like this 9893532233caff98cd083a116b013c0b, versionid is None

推荐答案

你的一个参数是一个没有自己的 __format__() 方法的类型，所以 object.__format__() 代替.

One of your parameters is a type that doesn't have their own __format__() method, so object.__format__() is used instead.

object.__format__() 不支持任何格式选项，包括字段宽度和对齐方式，这就是您收到错误的原因.

object.__format__() doesn't support any formatting options, including field widths and alignment, which is why you get the error.

先转换为字符串应该会有所帮助，但您确实需要将转换放在字段名称之后；而不是 {!s4:11s} 使用 {4!s:11s} 等:

Conversion to string first should help, but you do need to put your conversion after the field name; instead of {!s4:11s} use {4!s:11s}, etc:

print ( "\t {0:20} {1:<11} {2:<25} {3:11} {4!s:11s} {5!s:>32s}".format(
    files.name.split('/')[-1], sizeof_fmt(files.size),                                                                           
    str(formatted_timestamp), files.owner,
    files.version_id, files.etag))

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