使用pyflakes3删除未使用的导入

Question

我有this代码，并想删除未使用的导入。当我跑的时候

pyflakes3 tdg.py

它向我展示了：

tdg.py:1: 'PyQt5.QtWidgets.QListWidget' imported but unused
tdg.py:1: 'PyQt5.QtWidgets.QListWidgetItem' imported but unused
tdg.py:1: 'PyQt5.QtWidgets.QAbstractItemView' imported but unused
tdg.py:3: 'PyQt5.QtGui.QIcon' imported but unused
tdg.py:4: 'from PyQt5.QtGui import *' used; unable to detect undefined names
tdg.py:5: 'from PyQt5.QtWidgets import *' used; unable to detect undefined names
tdg.py:15: 'QGraphicsView' may be undefined, or defined from star imports: PyQt5.QtGui, PyQt5.QtWidgets
tdg.py:21: 'QPainter' may be undefined, or defined from star imports: PyQt5.QtGui, PyQt5.QtWidgets
tdg.py:21: 'QPainter' may be undefined, or defined from star imports: PyQt5.QtGui, PyQt5.QtWidgets
tdg.py:24: 'QPalette' may be undefined, or defined from star imports: PyQt5.QtGui, PyQt5.QtWidgets
tdg.py:26: 'QGraphicsScene' may be undefined, or defined from star imports: PyQt5.QtGui, PyQt5.QtWidgets
tdg.py:29: 'QGraphicsPixmapItem' may be undefined, or defined from star imports: PyQt5.QtGui, PyQt5.QtWidgets
tdg.py:52: 'QtCore' may be undefined, or defined from star imports: PyQt5.QtGui, PyQt5.QtWidgets
tdg.py:54: 'QDialog' may be undefined, or defined from star imports: PyQt5.QtGui, PyQt5.QtWidgets
tdg.py:73: 'QFormLayout' may be undefined, or defined from star imports: PyQt5.QtGui, PyQt5.QtWidgets
tdg.py:104: 'QFrame' may be undefined, or defined from star imports: PyQt5.QtGui, PyQt5.QtWidgets
tdg.py:109: 'QFont' may be undefined, or defined from star imports: PyQt5.QtGui, PyQt5.QtWidgets
tdg.py:210: local variable 'pixmap' is assigned to but never used
tdg.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？pyflakes3足够了吗?或者有没有更好的工具？

Answer 1

可以删除QListWidget、QListWidgetItem、QAbstractItemView和QIcon导入。此外，变量pixmap也可以删除，因为它“从未使用过”。

要修复有关星形导入的警告，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

然后删除星形导入。