Question

import sys

try:
    raise Exception('foobar')
except:
    info = sys.exc_info()

print(type(e[2])) # <class 'traceback'>
help(traceback) # NameError: name 'traceback' is not defined

Python用于异常报告的回溯对象的类型究竟是什么？

sys.exc_info上的文档提到了参考手册，但是虽然我发现了很多关于如何操作回溯实例的信息，但我希望能够访问类型（类）本身。

Answer 1

$Duration = Measure-Command { $b = @() foreach ($Property in $data.Property | Select -Unique) { $Props = [ordered]@{ Property = $Property } foreach ($Server in $data.Server | Select -Unique){ $Value = ($data.where({ $_.Server -eq $Server -and $_.Property -eq $Property })).Value $Props += @{ $Server = $Value } } $b += New-Object -TypeName PSObject -Property $Props } } Write-Host "Finished transposing " -ForegroundColor Green -NoNewline Write-Host "$(($data | Get-Member -MemberType Properties).count)/$($data.Count)" -ForegroundColor Yellow -NoNewline Write-Host " columns/rows into " -ForegroundColor Green -NoNewline Write-Host "$(($b | Get-Member -MemberType Properties).count)/$($b.Count)" -ForegroundColor Yellow -NoNewline Write-Host " columns/rows in " -ForegroundColor Green -NoNewline Write-Host $Duration.Milliseconds -ForegroundColor Yellow -NoNewline Write-Host " Milliseconds" -ForegroundColor Green $b | FT -AutoSize $b | Out-GridView $b | Export-Csv .\newData.csv -NoTypeInformation object是类型模块下的TracebackType实例。

traceback

types.TracebackType对象的类型，例如traceback中找到的对象。

sys.exc_info()[2]

作为pointed out by @user2357112，名称>>> from types import TracebackType >>> isinstance(info[2], TracebackType) True >>> TracebackType <class 'traceback'>基本上是内部TracebackType类型的别名，在类型模块中是set by raising an exception。实际的traceback type可以在CPython代码中找到。

Python中的回溯对象的类型是什么？

1 个答案: