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I am trying to set up an application that will accept havin files dropped into it. So, I am looking for a way to extract the path when they are dropped in.

Right now, I have drag and drop enabled for the right part of the application, and it will accept text dropped in, but I do not know how to handle having a file dropped in.

I am using:

def PTE_dragEnterEvent(self, e):
    if e.mimeData().hasFormat('text/plain'):
        e.accept()
    else:
        e.ignore() 
def PTE_dropEvent(self, e):
    newText = self.ui.fileListPTE.toPlainText() + '\n\n' + e.mimeData().text()
    self.ui.fileListPTE.setPlainText(newText)
Which is slightly modifying the code provided in the Zetcode Drag and Drop  tutorial.
I couldn't quite get @ekhumoro answer to work for me, but it gave me more places to look, and I found Drag and drop files into QListWidget which helped.
In addition to the suggestions made by ekhumoro I needed to implement the drag move event.  What I finally used looked like:
def dragEnterEvent(self, event):
    if event.mimeData().hasUrls:
        event.accept()
    else:
        event.ignore()
def dragMoveEvent(self, event):
    if event.mimeData().hasUrls:
        event.setDropAction(QtCore.Qt.CopyAction)
        event.accept()
    else:
        event.ignore()
def dropEvent(self, event):
    if event.mimeData().hasUrls:
        event.setDropAction(QtCore.Qt.CopyAction)
        event.accept()
        newText = self.ui.fileListPTE.toPlainText()
        for url in event.mimeData().urls():
            newText += '\n' + str(url.toLocalFile())
        self.ui.fileListPTE.setPlainText(newText)
        self.emit(QtCore.SIGNAL("dropped"))
    else:
        event.ignore()
The QMimeData class has methods for dealing with dropped urls. Below is a minimal working example:
# from PyQt4.QtGui import QApplication, QLabel
# from PySide2.QtWidgets import QApplication, QLabel
from PyQt5.QtWidgets import QApplication, QLabel
class Window(QLabel):
    def __init__(self):
        super().__init__()
        self.setAcceptDrops(True)
    def dragEnterEvent(self, event):
        print('drag-enter')
        if event.mimeData().hasUrls():
            print('has urls')
            event.accept()
        else:
            event.ignore()
    def dropEvent(self, event):
        lines = []
        for url in event.mimeData().urls():
            lines.append('dropped: %r' % url.toLocalFile())
        self.setText('\n'.join(lines))
app = QApplication(['Drag & Drop'])
window = Window()
window.setGeometry(50, 100, 400, 300)
window.show()
app.exec_()
UPDATE:
Regarding the additions to the question:
Some widgets (unlike the QLabel used above) have a default implementation of dragMoveEvent that explicitly ignores most events. For example, classes based on QAbstractItemView may only handle certain kinds of internal move and ignore everything else. In which case, a reimplementation of dragMoveEvent should be added that explicitly accepts the events that need to be handled differently:
class MyView(QTableView):
    def dragMoveEvent(self, event):
        if event.mimeData().hasUrls():
            event.accept()
        else:
            super().dragMoveEvent(event)
                So I noticed if I drop a file in and print event.mimeData().urls() it returns values like /.file/id=6571367.6613263, which I believe are some sort of OSX temporary files. Wondering, how would one go about getting the proper filename or directory as opposed to this sort of temporary marker?
– tom f
                Aug 14, 2015 at 0:04
        
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