text: #!/usr/bin/env python
  # coding=utf-8
  import random
  import time
  import os
  from PIL import Image, ImageDraw, ImageFont, ImageFilter
  from _mysql import result
  from django.conf import settings
  import shutil
  
  
  _letter_cases = "abcdefghjkmnpqrstuvwxy"  # 小写字母，去除可能干扰的i，l，o，z
  _upper_cases = _letter_cases.upper()  # 大写字母
  _numbers = ''.join(map(str, range(1, 10)))  # 数字
  init_chars = ''.join((_letter_cases, _upper_cases, _numbers))
  allFileNum = 0  
  font_abspath=settings.ROOT_PATH +'/static/dashboard/fonts/Arial.ttf' 
  # 参数是物理地址
  fontType = ImageFont.truetype(font_abspath, 20)
  
  # 随机颜色1:
  def rndColor():
      return (random.randint(64, 255), random.randint(64, 255), random.randint(64, 255))
  
  # 随机颜色2:
  def rndColor2():
      return (random.randint(32, 200), random.randint(32, 200), random.randint(32, 200))
  
  
  
  def create_lines(draw, width, height):
      '''绘制干扰线'''
      line_num = random.randint(0, 3)  # 干扰线条数
      i = 0
      for i in range(line_num):  # 起始点
          begin = (random.randint(0, width), random.randint(0, height))
          # 结束点
          end = (random.randint(0, width), random.randint(0, height))
          draw.line([begin, end], fill=rndColor())
  
  def create_points(draw, point_chance, width, height):
      '''绘制干扰点'''
      chance = min(100, max(0, int(point_chance)))  # 大小限制在[0, 100]
      for w in xrange(width):
          for h in xrange(height):
              tmp = random.randint(0, 100)
              if tmp > 100 - chance:
                  draw.point((w, h), fill=rndColor())
  
  def create_strs(draw, chars, length, font_type, font_size, width, height, fg_color):
      '''绘制验证码字符'''
      '''生成给定长度的字符串，返回列表格式'''
      c_chars = random.sample(chars, 4)
      strs = ' '.join(c_chars)  # 每个字符前后以空格隔开
      font = ImageFont.truetype(font_abspath, 37)
      font_width, font_height = font.getsize(strs)
      draw.text(((width - font_width) / 4, (height - font_height) / 4), strs, font=font, fill=rndColor2())
      return ''.join(c_chars)
  
  
  def create_validate_code(size=(240, 60),
                               chars=init_chars,
                               img_type="GIF",
                               mode="RGB",
                               bg_color=(255, 255, 255),
                               fg_color=(0, 0, 255),
                               font_size=18,
                               font_type=fontType,
                               length=4,
                               draw_lines=True,
                               n_line=(1, 2),
                               draw_points=True,
                               point_chance=2):
      '''
      @todo: 生成验证码图片
      @param size: 图片的大小，格式（宽，高），默认为(120, 30)
      @param chars: 允许的字符集合，格式字符串
      @param img_type: 图片保存的格式，默认为GIF，可选的为GIF，JPEG，TIFF，PNG
      @param mode: 图片模式，默认为RGB
      @param bg_color: 背景颜色，默认为白色
      @param fg_color: 前景色，验证码字符颜色，默认为蓝色#0000FF
      @param font_size: 验证码字体大小
      @param font_type: 验证码字体，默认为 ae_AlArabiya.ttf
      @param length: 验证码字符个数
      @param draw_lines: 是否划干扰线
      @param n_lines: 干扰线的条数范围，格式元组，默认为(1, 2)，只有draw_lines为True时有效
      @param draw_points: 是否画干扰点
      @param point_chance: 干扰点出现的概率，大小范围[0, 100]
      @return: [0]: PIL Image实例
      @return: [1]: 验证码图片中的字符串
      '''
      width, height = size  # 宽， 高
      img = Image.new(mode, size, bg_color)  # 创建图形
      draw = ImageDraw.Draw(img)  # 创建画笔
  
      if draw_lines:
          create_lines(draw,  width, height)
          if draw_points:
              create_points(draw, point_chance, width, height)
              text=create_strs(draw, chars, length, font_type, font_size, width, height, fg_color)
  
      
      #图形扭曲参数
      params = [1 - float(random.randint(1, 2)) / 100,0,0,0,
          1 - float(random.randint(1, 10)) / 100,
          float(random.randint(1, 2)) / 500,
          0.001,
          float(random.randint(1, 2)) / 500
          ]
      img = img.transform(size, Image.PERSPECTIVE, params)  # 创建扭曲
      #img = img.filter(ImageFilter.EDGE_ENHANCE_MORE)  # 滤镜，边界加强（阈值更大）
      result={'img':img,'text':text}
      return result
  
  
  
  def createCode():
      code_img = create_validate_code()
      return code_img
  
                      