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怎么在python中使用pyqt5實(shí)現(xiàn)一個(gè)圖片批量縮放工具?相信很多沒(méi)有經(jīng)驗(yàn)的人對(duì)此束手無(wú)策,為此本文總結(jié)了問(wèn)題出現(xiàn)的原因和解決方法,通過(guò)這篇文章希望你能解決這個(gè)問(wèn)題。
Python是一種跨平臺(tái)的、具有解釋性、編譯性、互動(dòng)性和面向?qū)ο蟮哪_本語(yǔ)言,其最初的設(shè)計(jì)是用于編寫(xiě)自動(dòng)化腳本,隨著版本的不斷更新和新功能的添加,常用于用于開(kāi)發(fā)獨(dú)立的項(xiàng)目和大型項(xiàng)目。
通過(guò)命令行安裝。
pip install pillow pip install pyqt5
代碼:
#!-*-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): #獲得新文件名稱(chēng) 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 設(shè)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) #輸出路徑 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'可以拖拽文件到這里來(lái)' ) grid.addWidget(self.m_tedit, 1, 0, 4, 3) self.m_scale_set_btn = QPushButton( u"設(shè)置縮放值" ) 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"設(shè)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"設(shè)置寬度" ) 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'選擇文件') self.m_file_btn.clicked.connect( self.file_func ) self.m_folder_btn = QPushButton(u'選擇文件夾') self.m_folder_btn.clicked.connect( self.folder_func ) self.m_generate_btn = QPushButton(u'處理') 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"批量圖片縮放") self.setWindowIcon(QIcon('icon.png')) self.show() #按照輸入的縮放值進(jìn)行縮放 def set_scale_func(self): text, ok = QInputDialog.getText( self, 'Input Scale', u'輸入縮放值' ) if ok: try: scale = float( text ) except ValueError: QMessageBox.warning( self, u"設(shè)置縮放值", u"輸入錯(cuò)誤" ) else: self.m_scale = scale self.refresh_setting(0) #根據(jù)高度的縮放比例等比例縮放 def set_height_func(self): text, ok = QInputDialog.getText( self, 'Input Height', u'輸入高度' ) if ok: try: height = int( text ) except ValueError: QMessageBox.warning( self, u"設(shè)置高度", u"輸入錯(cuò)誤" ) else: self.m_height = height self.refresh_setting(2) #根據(jù)寬度的縮放比例等比例縮放 def set_width_func(self): text, ok = QInputDialog.getText( self, 'Input Width', u'輸入寬度' ) if ok: try: width = int( text ) except ValueError: QMessageBox.warning( self, u"設(shè)置寬度", u"輸入錯(cuò)誤" ) 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"未選擇文件" ) 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"請(qǐng)先選擇文件" ) return elif os.path.isdir(p) == True: QMessageBox.warning( self, u"Warning", u"文件夾不能設(shè)置寬度" ) 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"請(qǐng)先選擇文件" ) return elif os.path.isdir(p) == True: QMessageBox.warning( self, u"Warning", u"文件夾不能設(shè)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_() )
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