怎么在python中使用pyqt5实现一个图片批量缩放工具？相信很多没有经验的人对此束手无策，为此本文总结了问题出现的原因和解决方法，通过这篇文章希望你能解决这个问题。
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Python是一种跨平台的、具有解释性、编译性、互动性和面向对象的脚本语言，其最初的设计是用于编写自动化脚本，随着版本的不断更新和新功能的添加，常用于用于开发独立的项目和大型项目。
通过命令行安装。
pip install pillow
pip install pyqt5
代码：
#!-*-coding:utf-8-*-
from PIL import Image
import hashlib, os, sys
from PyQt5.QtGui import QFont, QIcon
from PyQt5.QtWidgets import (QFileDialog, QMessageBox,
QGridLayout, QLineEdit, QTextEdit, QLabel, QWidget, QToolTip,
QPushButton, QApplication, QInputDialog)
from PyQt5.QtCore import QCoreApplication
def makedir(path):
if not os.path.exists(path):
os.mkdir(path)
def image_resize(image_path, scale):
#获得新文件名称
out_path = os.path.splitext(image_path)[0] + "_after" + os.path.splitext(image_path)[-1]
with Image.open( image_path ) as im:
width = int(im.size[0]*scale)
height = int(im.size[1]*scale)
#resize 设置新尺寸
out = im.resize( (width, height) )
out.save(out_path)
def folder_resize(folder_path, scale):
dst_files = []
files = os.listdir( folder_path )
for file in files:
ext = os.path.splitext(file)[-1]
#只支持jpg或png文件
if ext == ".jpg" or ext == ".png":
dst_files.append(file)
#输出路径
out_folder = os.path.join(folder_path, "after")
makedir(out_folder)
for item in dst_files:
try:
op = os.path.join( out_folder, item )
with Image.open( os.path.join(folder_path, item) ) as im:
width = int(im.size[0]*scale)
height = int(im.size[1]*scale)
out = im.resize( (width, height) )
out.save(op)
except FileNotFoundError:
print("file not found " + item)
class MainBody(QWidget):
def __init__(self):
super(MainBody, self).__init__()
self.init()
self.m_scale = 1.0
self.m_width = 0
self.m_height = 0
def init(self):
grid = QGridLayout()
self.setLayout(grid)
grid.setSpacing(10)
self.m_tedit = QTextEdit()
self.m_tedit.setToolTip( u'可以拖拽文件到这里来' )
grid.addWidget(self.m_tedit, 1, 0, 4, 3)
self.m_scale_set_btn = QPushButton( u"设置缩放值" )
self.m_scale_set_btn.clicked.connect( self.set_scale_func )
grid.addWidget( self.m_scale_set_btn, 1, 3 )
self.m_scale_label = QLabel( "1.0" )
grid.addWidget( self.m_scale_label, 2, 3 )
self.m_height_set_btn = QPushButton( u"设置高度" )
self.m_height_set_btn.clicked.connect( self.set_height_func )
grid.addWidget( self.m_height_set_btn, 3, 3 )
self.m_height_label = QLabel( "0" )
grid.addWidget( self.m_height_label, 4, 3 )
self.m_width_set_btn = QPushButton( u"设置宽度" )
self.m_width_set_btn.clicked.connect( self.set_width_func )
grid.addWidget( self.m_width_set_btn, 5, 3 )
self.m_width_label = QLabel( "0" )
grid.addWidget( self.m_width_label, 6, 3 )
self.m_file_btn = QPushButton(u'选择文件')
self.m_file_btn.clicked.connect( self.file_func )
self.m_folder_btn = QPushButton(u'选择文件夹')
self.m_folder_btn.clicked.connect( self.folder_func )
self.m_generate_btn = QPushButton(u'处理')
self.m_generate_btn.clicked.connect( self.generate_func )
self.m_clear_btn = QPushButton(u'清空')
self.m_clear_btn.clicked.connect( self.clear_func )
grid.addWidget(self.m_file_btn, 5, 0)
grid.addWidget(self.m_folder_btn, 5, 1)
grid.addWidget(self.m_generate_btn, 6, 0)
grid.addWidget(self.m_clear_btn, 6, 1)
self.setGeometry(300,300,300,200)
self.setWindowTitle(u"批量图片缩放")
self.setWindowIcon(QIcon('icon.png'))
self.show()
#按照输入的缩放值进行缩放
def set_scale_func(self):
text, ok = QInputDialog.getText( self, 'Input Scale', u'输入缩放值' )
if ok:
try:
scale = float( text )
except ValueError:
QMessageBox.warning( self, u"设置缩放值", u"输入错误" )
else:
self.m_scale = scale
self.refresh_setting(0)
#根据高度的缩放比例等比例缩放
def set_height_func(self):
text, ok = QInputDialog.getText( self, 'Input Height', u'输入高度' )
if ok:
try:
height = int( text )
except ValueError:
QMessageBox.warning( self, u"设置高度", u"输入错误" )
else:
self.m_height = height
self.refresh_setting(2)
#根据宽度的缩放比例等比例缩放
def set_width_func(self):
text, ok = QInputDialog.getText( self, 'Input Width', u'输入宽度' )
if ok:
try:
width = int( text )
except ValueError:
QMessageBox.warning( self, u"设置宽度", u"输入错误" )
else:
self.m_width = width
self.refresh_setting(1)
def file_func(self):
filename, ok = QFileDialog.getOpenFileName(self, "Open File", "C:/Users/Administrator/Desktop", "JPG (*.jpg);;PNG (*.png)")
if ok:
self.m_tedit.setText( filename )
size = self.get_image_size( filename )
s,w,h = self.get_current_setting()
self.m_width = int(size[0]*s)
self.m_height = int(size[1]*s)
self.m_height_label.setText( str( self.m_height ) )
self.m_width_label.setText( str( self.m_width ) )
def folder_func(self):
filename = QFileDialog.getExistingDirectory(self, "Open File", "C:/Users/Administrator/Desktop")
self.m_tedit.setText( filename )
def generate_func(self):
path = self.get_image_path()
if path == None or path == "":
QMessageBox.warning( self, u"Error", u"未选择文件" )
return
elif os.path.exists(path) == False:
QMessageBox.warning( self, u"Error", u"文件不存在" )
return
if os.path.isdir(path):
folder_resize( path, self.m_scale )
elif os.path.isfile(path):
image_resize( path, self.m_scale )
def clear_func(self):
self.m_tedit.clear()
self.m_width = 0
self.m_height = 0
self.m_width_label.setText("0")
self.m_height_label.setText("0")
def get_image_size(self, image_path):
with Image.open(image_path) as im:
return im.size
def get_image_path(self):
path = self.m_tedit.toPlainText()
if path.startswith( 'file:///' ):
path = path[8:]
return path
def get_current_setting(self):
return self.m_scale, self.m_width, self.m_height
def refresh_setting(self, kind):
s, w, h = self.get_current_setting()
p = self.get_image_path()
if kind == 0:
if p == None or p == "" or os.path.exists(p) == False or os.path.isdir(p) == True:
w = 0
h = 0
else:
size = self.get_image_size(p)
w = size[0]*s
h = size[1]*s
elif kind == 1:
if p == None or p == "" or os.path.exists(p) == False:
QMessageBox.warning( self, u"Warning", u"请先选择文件" )
return
elif os.path.isdir(p) == True:
QMessageBox.warning( self, u"Warning", u"文件夹不能设置宽度" )
return
size = self.get_image_size(p)
w = int(w)
s = w*1.0/size[0]
h = int((w/size[0])*size[1])
elif kind == 2:
if p == None or p == "" or os.path.exists(p) == False:
QMessageBox.warning( self, u"Warning", u"请先选择文件" )
return
elif os.path.isdir(p) == True:
QMessageBox.warning( self, u"Warning", u"文件夹不能设置高度" )
return
size = self.get_image_size(p)
h = int(h)
s = h*1.0/size[1]
w = int((h/size[1])*size[0])
self.m_width = int(w)
self.m_height = int(h)
self.m_scale = float(s)
self.m_width_label.setText(str(self.m_width))
self.m_height_label.setText(str(self.m_height))
self.m_scale_label.setText(str(self.m_scale))
if __name__ == "__main__":
app = QApplication(sys.argv)
mb = MainBody()
sys.exit( app.exec_() )看完上述内容，你们掌握怎么在python中使用pyqt5实现一个图片批量缩放工具的方法了吗？如果还想学到更多技能或想了解更多相关内容，欢迎关注创新互联行业资讯频道，感谢各位的阅读！
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