十八掌徐培成倾力打造大数据开发

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I have a powershell script that I am writing where I need to keep daily backups for the current month, end of the month backups for the year, and remove anything other than that.

$ThisYear = (Get-Date).year
$DailyLogs = (Get-Date).month

#Clean-Up Old Backup Files
Get-ChildItem 'D:\' | ForEach-Object {
    if ( $_.LastWriteTime.Year -gt $ThisYear) {
        Remove-Item
    }
    Elsif ( $_.LastWriteTime.Month -gt $ThisMonth -and $_.LastWriteTime.Date -ne ) {
        Remove-Item
    }

So far this should remove any backup files that are not from the current year. The piece I am trying to solve is how to delete the daily backups except for the backup files for the end of each month after the current month. I am stuck about how to get the -ne to the last day of any given month part.

Edit:

#Clean-Up Old Backup Files
Get-ChildItem 'D:\Server Backup\' | ForEach-Object {
    if ( $_.LastWriteTime.Year -gt $ThisYear) {
        Remove-Item
    }
    Elsif ( $_.LastWriteTime.Month -gt $ThisMonth -and $_.LastWriteTime.Date -ne [System.DateTime]::DaysInMonth($_.LastWriteTime.Year, $($_.LastWriteTime.Month))) {
        Remove-Item
    }
}

Based on Lee's comment here is my idea.

I used a draw function to draw a rectangle in the image.

def draw(image, location):
    ...
    cv2.rectangle(image, ...)
    return image

Since there are many locations of rectangles, I used the map function to draw those rectangles.

list(map(lambda x: draw(image, x), locations))

However, this function is executed serially. This means that the speed is very slow. Is there a way to draw rectangles on the same image in parallel?