目录
引言全部代码环境准备代码结构代码实现运行结果引言
在日常办公中，PPT文件往往因为图片过大而导致文件体积过大，不便于传输和存储。为了应对这一问题，我们可以使用Python的wxPython图形界面库结合python-pptx和Pillow，开发一个简单的PPTX压缩工具。本文将详细介绍如何实现这一功能。
全部代码
import wximport osfrom pptx import Presentationfrom PIL import Imageimport ioclass CompressorFrame(wx.Frame): def __init__(self): super().__init__(parent=None, title='PPTX压缩工具') self.panel = wx.Panel(self) self.create_ui() def create_ui(self): vbox = wx.BoxSizer(wx.VERTICAL) # 文件选择部分 hbox1 = wx.BoxSizer(wx.HORIZONTAL) self.file_path = wx.TextCtrl(self.panel, size=(300, -1)) browse_btn = wx.Button(self.panel, label='选择文件') browse_btn.Bind(wx.EVT_BUTTON, self.on_browse) hbox1.Add(self.file_path, proportion=1, flag=wx.EXPAND|wx.ALL, border=5) hbox1.Add(browse_btn, flag=wx.ALL, border=5) # 压缩按钮 compress_btn = wx.Button(self.panel, label='开始压缩') compress_btn.Bind(wx.EVT_BUTTON, self.on_compress) # 进度条 self.progress = wx.Gauge(self.panel, range=100, size=(400, 25)) # 状态文本 self.status_text = wx.StaticText(self.panel, label="") vbox.Add(hbox1, flag=wx.EXPAND|wx.ALL, border=5) vbox.Add(compress_btn, flag=wx.ALIGN_CENTER|wx.ALL, border=5) vbox.Add(self.progress, flag=wx.EXPAND|wx.ALL, border=5) vbox.Add(self.status_text, flag=wx.EXPAND|wx.ALL, border=5) self.panel.SetSizer(vbox) self.Fit() def on_browse(self, event): with wx.FileDialog(self, "选择PPTX文件", wildcard="PowerPoint files (*.pptx)|*.pptx", style=wx.FD_OPEN | wx.FD_FILE_MUST_EXIST) as fileDialog: if fileDialog.ShowModal() == wx.ID_CANCEL: return path = fileDialog.GetPath() path = os.path.normpath(path.strip('"')) self.file_path.SetValue(path) def update_status(self, text): wx.CallAfter(self.status_text.SetLabel, text) def on_compress(self, event): if not self.file_path.GetValue(): wx.MessageBox('请先选择文件', '提示', wx.OK | wx.ICON_INFORMATION) return input_path = self.file_path.GetValue().strip('"') input_path = os.path.normpath(input_path) if not os.path.exists(input_path): wx.MessageBox('文件不存在，请检查路径', '错误', wx.OK | wx.ICON_ERROR) return output_path = self._get_output_path(input_path) try: self._compress_pptx(input_path, output_path) wx.MessageBox('压缩完成！\n保存路径：' + output_path, '成功', wx.OK | wx.ICON_INFORMATION) except Exception as e: wx.MessageBox(f'压缩过程中出错：{str(e)}', '错误', wx.OK | wx.ICON_ERROR) finally: self.progress.SetValue(0) self.update_status("") def _get_output_path(self, input_path): directory = os.path.dirname(input_path) filename = os.path.basename(input_path) name, ext = os.path.splitext(filename) return os.path.join(directory, f"{name}_compressed{ext}") def _compress_pptx(self, input_path, output_path): try: prs = Presentation(input_path) except Exception as e: raise Exception(f"无法打开PPTX文件: {str(e)}") total_slides = len(prs.slides) processed_images = 0 skipped_images = 0 for i, slide in enumerate(prs.slides): self.update_status(f"正在处理第 {i+1}/{total_slides} 张幻灯片") shapes_with_images = [] for shape in slide.shapes: if hasattr(shape, "image"): shapes_with_images.append(shape) for shape in shapes_with_images: try: # 获取图片数据 image_bytes = shape.image.blob # 使用PIL压缩图片 with Image.open(io.BytesIO(image_bytes)) as img: # 转换RGBA为RGB if img.mode == 'RGBA': img = img.convert('RGB') # 压缩图片 # 如果图片较大，调整尺寸 max_size = 800 # 最大尺寸为1024像素 if img.width > max_size or img.height > max_size: ratio = min(max_size/img.width, max_size/img.height) new_size = (int(img.width * ratio), int(img.height * ratio)) img = img.resize(new_size, Image.LANCZOS) output_buffer = io.BytesIO() img.save(output_buffer, format='JPEG', quality=10, optimize=True) # 替换原图片 shape._element.blip.embed.rId = shape._element.blip.embed.rId new_image = output_buffer.getvalue() # 更新图片数据 image_part = shape.image image_part._blob = new_image processed_images += 1 except Exception as e: print(f"处理图片时出错: {str(e)}") skipped_images += 1 continue # 更新进度条 progress = int((i + 1) / total_slides * 100) wx.CallAfter(self.progress.SetValue, progress) self.update_status(f"完成！成功处理 {processed_images} 张图片，跳过 {skipped_images} 张图片") try: prs.save(output_path) except Exception as e: raise Exception(f"保存文件时出错: {str(e)}")def main(): app = wx.App() frame = CompressorFrame() frame.Show() app.MainLoop()if __name__ == '__main__': main()环境准备
在开始之前，我们需要安装以下Python库：
wxPython：用于创建图形用户界面python-pptx：用于处理PPTX文件Pillow：用于图片压缩安装命令：
pip install wxPython python-pptx Pillow
代码结构
代码主要包括以下几个部分：
图形界面设计文件选择与压缩功能图片压缩逻辑代码实现
导入必要模块
import wximport osfrom pptx import Presentationfrom PIL import Imageimport io
创建主窗口
主窗口CompressorFrame继承自wx.Frame，用于展示UI组件。
class CompressorFrame(wx.Frame): def __init__(self): super().__init__(parent=None, title='PPTX压缩工具') self.panel = wx.Panel(self) self.create_ui() def create_ui(self): vbox = wx.BoxSizer(wx.VERTICAL) # 文件选择部分 hbox1 = wx.BoxSizer(wx.HORIZONTAL) self.file_path = wx.TextCtrl(self.panel, size=(300, -1)) browse_btn = wx.Button(self.panel, label='选择文件') browse_btn.Bind(wx.EVT_BUTTON, self.on_browse) hbox1.Add(self.file_path, proportion=1, flag=wx.EXPAND|wx.ALL, border=5) hbox1.Add(browse_btn, flag=wx.ALL, border=5) # 压缩按钮 compress_btn = wx.Button(self.panel, label='开始压缩') compress_btn.Bind(wx.EVT_BUTTON, self.on_compress) # 进度条 self.progress = wx.Gauge(self.panel, range=100, size=(400, 25)) # 状态文本 self.status_text = wx.StaticText(self.panel, label="") vbox.Add(hbox1, flag=wx.EXPAND|wx.ALL, border=5) vbox.Add(compress_btn, flag=wx.ALIGN_CENTER|wx.ALL, border=5) vbox.Add(self.progress, flag=wx.EXPAND|wx.ALL, border=5) vbox.Add(self.status_text, flag=wx.EXPAND|wx.ALL, border=5) self.panel.SetSizer(vbox) self.Fit()
文件选择功能
通过文件对话框让用户选择PPTX文件。
def on_browse(self, event): with wx.FileDialog(self, "选择PPTX文件", wildcard="PowerPoint files (*.pptx)|*.pptx", style=wx.FD_OPEN | wx.FD_FILE_MUST_EXIST) as fileDialog: if fileDialog.ShowModal() == wx.ID_CANCEL: return path = fileDialog.GetPath() self.file_path.SetValue(os.path.normpath(path.strip('"')))压缩功能实现
压缩图片逻辑：
使用Pillow库压缩PPT中的图片，将其转换为JPEG格式，并降低质量以减少文件大小。限制图片的最大尺寸，保持图片的可视质量。更新进度条与状态：
使用wx.Gauge展示处理进度。
实时更新处理状态。
def _compress_pptx(self, input_path, output_path): prs = Presentation(input_path) total_slides = len(prs.slides) processed_images = 0 skipped_images = 0 for i, slide in enumerate(prs.slides): self.update_status(f"正在处理第 {i+1}/{total_slides} 张幻灯片") shapes_with_images = [shape for shape in slide.shapes if hasattr(shape, "image")] for shape in shapes_with_images: try: image_bytes = shape.image.blob with Image.open(io.BytesIO(image_bytes)) as img: if img.mode == 'RGBA': img = img.convert('RGB') max_size = 800 if img.width > max_size or img.height > max_size: ratio = min(max_size/img.width, max_size/img.height) new_size = (int(img.width * ratio), int(img.height * ratio)) img = img.resize(new_size, Image.LANCZOS) output_buffer = io.BytesIO() img.save(output_buffer, format='JPEG', quality=10, optimize=True) new_image = output_buffer.getvalue() shape.image._blob = new_image processed_images += 1 except Exception as e: print(f"处理图片时出错: {str(e)}") skipped_images += 1 wx.CallAfter(self.progress.SetValue, int((i + 1) / total_slides * 100)) self.update_status(f"完成！成功处理 {processed_images} 张图片，跳过 {skipped_images} 张图片") prs.save(output_path)主函数
启动wxPython应用程序。
def main(): app = wx.App() frame = CompressorFrame() frame.Show() app.MainLoop()if __name__ == '__main__': main()
运行结果
