python作为简单、易学的编程语言，上手入门要容易许多。如果数据分析、机器学习、人工智能这些对你来说比较遥远，用python写一点实用的小脚本帮你解决问题、提高办公效率也是不错的。
图片缩放、格式转换是一个常见的需求，网上虽然有许多这样的工具，但是下载站的质量参差不齐，如果没注意的话非常容易中招。这样不如自己用python写一个，安全有保障。
主要用到了PIL对图像进行处理。tkinter用来做图形界面，方便打包分享使用。
实现效果
实现代码
1import os 2from PIL import Image 3import tkinter 4import tkinter.filedialog 5import tkinter.messagebox 6 7 8class Window(): 9 def __init__(self): 10 self.root = root = tkinter.Tk() 11 self.menu = tkinter.Menu(root) 12 self.submenu = tkinter.Menu(self.menu, tearoff=0) 13 root.config(menu=self.submenu) 14 self.Image = tkinter.StringVar() 15 self.Image.set('.bmp') 16 self.mstatus = tkinter.IntVar() 17 self.fstatus = tkinter.IntVar() 18 self.mstatus.set(0) 19 self.fstatus.set(0) 20 self.status = tkinter.StringVar() 21 self.label = tkinter.Label(root, text='输入百分比') 22 self.label.place(x=5, y=5) 23 self.entryNew = tkinter.Entry(root) 24 self.entryNew.place(x=70, y=5) 25 self.checkM = tkinter.Checkbutton(self.root, text='批量转换', command=self.OnCheckM, variable=self.mstatus, 26 onvalue=1, offvalue=0) 27 self.checkM.place(x=5, y=30) 28 self.label = tkinter.Label(root, text='选择文件') 29 self.label.place(x=5, y=55) 30 self.entryFile = tkinter.Entry(root) 31 self.entryFile.place(x=70, y=55) 32 self.BrowserFileButton = tkinter.Button(root, text='浏览', command=self.BrowserFile) 33 self.BrowserFileButton.place(x=220, y=55) 34 self.label = tkinter.Label(root, text='选择目录') 35 self.label.place(x=5, y=90) 36 self.entryDir = tkinter.Entry(root, state=tkinter.DISABLED) 37 self.entryDir.place(x=70, y=90) 38 self.BrowserDirButton = tkinter.Button(root, text='浏览', command=self.BrowserDir, state=tkinter.DISABLED) 39 self.BrowserDirButton.place(x=220, y=90) 40 41 self.checkF = tkinter.Checkbutton(root, text='改变文件格式', onvalue=1, offvalue=0, variable=self.fstatus, 42 command=self.OnCheckF) 43 self.checkF.place(x=5, y=120) 44 45 frame = tkinter.Frame(root, ) 46 frame.place(x=10, y=150) 47 self.rBmp = tkinter.Radiobutton(frame, variable=self.Image, value='.bmp', text='BMP', state=tkinter.DISABLED) 48 self.rBmp.pack(anchor='w') 49 self.rJpg = tkinter.Radiobutton(frame, variable=self.Image, value='.jpg', text='JPG', state=tkinter.DISABLED) 50 self.rJpg.pack(anchor='w') 51 self.rPng = tkinter.Radiobutton(frame, variable=self.Image, value='.png', text='PNG', state=tkinter.DISABLED) 52 self.rPng.pack(anchor='w') 53 self.rGif = tkinter.Radiobutton(frame, variable=self.Image, value='.gif', text='GIF', state=tkinter.DISABLED) 54 self.rGif.pack(anchor='w') 55 self.ButtonCov = tkinter.Button(root, text='转换格式', command=self.Conv, ) 56 self.ButtonCov.place(x=120, y=180) 57 self.statusLabel = tkinter.Label(root, textvariable=self.status, fg='red') 58 self.statusLabel.place(x=80, y=220) 59 60 def OnCheckM(self): 61 if not self.mstatus.get(): 62 self.entryDir.config(state=tkinter.DISABLED) 63 self.entryFile.config(state=tkinter.NORMAL) 64 self.BrowserFileButton.config(state=tkinter.NORMAL) 65 self.BrowserDirButton.config(state=tkinter.DISABLED) 66 else: 67 self.entryDir.config(state=tkinter.NORMAL) 68 self.entryFile.config(state=tkinter.DISABLED) 69 self.BrowserFileButton.config(state=tkinter.DISABLED) 70 self.BrowserDirButton.config(state=tkinter.NORMAL) 71 72 def OnCheckF(self): 73 if not self.fstatus.get(): 74 self.rBmp.config(state=tkinter.DISABLED) 75 self.rPng.config(state=tkinter.DISABLED) 76 self.rJpg.config(state=tkinter.DISABLED) 77 self.rGif.config(state=tkinter.DISABLED) 78 else: 79 self.rBmp.config(state=tkinter.NORMAL) 80 self.rPng.config(state=tkinter.NORMAL) 81 self.rJpg.config(state=tkinter.NORMAL) 82 self.rGif.config(state=tkinter.NORMAL) 83 84 def BrowserFile(self): 85 file = tkinter.filedialog.askopenfilename(title='Python player', 86 filetypes=[('JPG', '*.jpg'), ('BMP', '*.bmp'), ('GIF', '*.gif'), 87 ('PNG', '*.png')]) 88 if file: 89 self.entryFile.delete(0, tkinter.END) 90 self.entryFile.insert(tkinter.END, file) 91 92 def BrowserDir(self): 93 directory = tkinter.filedialog.askdirectory(title='Python') 94 if directory: 95 self.entryDir.delete(0, tkinter.END) 96 self.entryDir.insert(tkinter.END, directory) 97 98 def make(self, file, format=None): 99 im = Image.open(file) 100 mode = im.mode 101 if mode not in ('L', 'RGB'): 102 im = im.convert('RGB') 103 width, height = im.size 104 s = self.entryNew.get() 105 if s == '': 106 tkinter.messagebox.showerror('出错啦', '请输入百分比') 107 return 108 else: 109 n = int(s) 110 nwidth = int(width * n / 100) 111 nheight = int(height * n / 100) 112 thumb = im.resize((nwidth, nheight), Image.ANTIALIAS) 113 if format: 114 thumb.save(file[:(len(file) - 4)] + '_thumb' + format) 115 else: 116 thumb.save(file[:(len(file) - 4)] + '_thumb' + file[-4:]) 117 118 def Conv(self): 119 n = 0 120 if self.mstatus.get(): 121 path = self.entryDir.get() 122 if path == "": 123 tkinter.messagebox.showerror('出错啦', '请选择路径') 124 return 125 filenames = os.listdir(path) 126 if self.fstatus.get(): 127 f = self.Image.get() 128 print(f) 129 for filename in filenames: 130 if filename[-3:] in ('bmp', 'jpg', 'gif', 'png'): 131 self.make(path + '/' + filename, f) 132 n += 1 133 else: 134 for filename in filenames: 135 if filename[-3:] in ('bmp', 'jpg', 'gif', 'png'): 136 self.make(path + '/' + filename) 137 n += 1 138 else: 139 file = self.entryFile.get() 140 if file == '': 141 tkinter.messagebox.showerror('出错啦', '请选择文件') 142 return 143 if self.fstatus.get(): 144 f = self.Image.get() 145 self.make(file, f) 146 n += 1 147 else: 148 self.make(file) 149 n += 1 150 self.status.set('成功转换 %d 张图片' % n) 151 152 def mainloop(self): 153 self.root.minsize(280, 270) 154 self.root.maxsize(280, 250) 155 self.root.title('图片转换') 156 self.root.mainloop() 157 158 159if __name__ == "__main__": 160 window = Window() 161 window.mainloop() 162
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