使用 pyflakes3 删除未使用的导入

Question

当我跑步时pyflakes3 tdg.py它向我展示：tdg.py:1: 'PyQt5.QtWidgets.QListWidget' imported but unusedtdg.py:1: 'PyQt5.QtWidgets.QListWidgetItem' imported but unusedtdg.py:1: 'PyQt5.QtWidgets.QAbstractItemView' imported but unusedtdg.py:3: 'PyQt5.QtGui.QIcon' imported but unusedtdg.py:4: 'from PyQt5.QtGui import *' used; unable to detect undefined namestdg.py:5: 'from PyQt5.QtWidgets import *' used; unable to detect undefined namestdg.py:15: 'QGraphicsView' may be undefined, or defined from star imports: PyQt5.QtGui, PyQt5.QtWidgetstdg.py:21: 'QPainter' may be undefined, or defined from star imports: PyQt5.QtGui, PyQt5.QtWidgetstdg.py:21: 'QPainter' may be undefined, or defined from star imports: PyQt5.QtGui, PyQt5.QtWidgetstdg.py:24: 'QPalette' may be undefined, or defined from star imports: PyQt5.QtGui, PyQt5.QtWidgetstdg.py:26: 'QGraphicsScene' may be undefined, or defined from star imports: PyQt5.QtGui, PyQt5.QtWidgetstdg.py:29: 'QGraphicsPixmapItem' may be undefined, or defined from star imports: PyQt5.QtGui, PyQt5.QtWidgetstdg.py:52: 'QtCore' may be undefined, or defined from star imports: PyQt5.QtGui, PyQt5.QtWidgetstdg.py:54: 'QDialog' may be undefined, or defined from star imports: PyQt5.QtGui, PyQt5.QtWidgetstdg.py:73: 'QFormLayout' may be undefined, or defined from star imports: PyQt5.QtGui, PyQt5.QtWidgetstdg.py:104: 'QFrame' may be undefined, or defined from star imports: PyQt5.QtGui, PyQt5.QtWidgetstdg.py:109: 'QFont' may be undefined, or defined from star imports: PyQt5.QtGui, PyQt5.QtWidgetstdg.py:210: local variable 'pixmap' is assigned to but never usedtdg.py:337: 'QMessageBox' may be undefined, or defined from star imports: PyQt5.QtGui, PyQt5.QtWidgets如何在不运行代码的情况下找出可以删除的内容？足够了pyflakes3还是有更好的工具？

Answer 1

QListWidget、QListWidgetItem、QAbstractItemView和QIcon导入可以被删除。该变量也pixmap可以被删除，因为它“从未使用过”。

要修复有关星号导入的警告，请显式定义导入，如下所示：

from PyQt5.QtGui import QPainter, QPalette, QFont

from PyQt5.QtWidgets import QGraphicsScene, QFrame, QGraphicsView, QGraphicsPixmapItem, QDialog, QFormLayout, QMessageBox

from PyQt5 import QtCore

然后删除明星进口。