“ TypeError：内置操作的错误参数类型” [英] "TypeError: bad argument type for built-in operation"

问题描述

在何种情况下，Python会引发此错误：

In what cases would Python throw this error:

"TypeError: bad argument type for built-in operation"

在以下代码行中报告了错误：

The error was reported in this line of code:

csv.reader(open(file_name), dialect=dialect)

我尝试重现它，但最接近的是此错误：

I've tried to reproduce it but the closest I got was this error:

"TypeError: coercing to Unicode: need string or buffer, bool found"

我已经在Linux上尝试使用Python2.7和Python 2.5和Windows XP上的Python 2.4

I've tried with Python2.7 and Python 2.5 on Linux and Python 2.4 on Windows XP

推荐答案

Python中的 csv.reader 2.4有已知错误；参见 http://mail.python.org/pipermail/tutor/2008- January / 059758.html

The csv.reader in Python 2.4 has known bugs; see http://mail.python.org/pipermail/tutor/2008-January/059758.html

通常，内置操作的错误参数类型会在各处出现，因为这是由 PyErr_BadArgument CPython API调用。这意味着回溯不会有太大用处，因为C代码中引发了异常。调试的最佳选择是在调试器下运行Python并在 PyErr_BadArgument 上设置断点。

In general, "bad argument type for built-in operation" crops up all over the place because it's the exception text generated by PyErr_BadArgument CPython API call. This means that the traceback won't be much use because the exception is raised in C code. Your best bet for debugging is to run Python under a debugger and set a breakpoint on PyErr_BadArgument.

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