问题遇到的现象和发生背景
就想知道怎么从内存里把图片拽出来
问题相关代码，请勿粘贴截图
需要PIL库及Django库
from PIL import Image, ImageDraw, ImageFont # 引入绘图模块
import random # 引入随机函数模块
from django.http import HttpResponse # 引入HttpResponse模块，返回响应
from io import BytesIO # 在内存中创建
def get_random_color():
color = (random.randint(0, 255),
random.randint(0, 255),
random.randint(0, 255))
return color
def verification_code(request):
1.1 定义变量，宽，高，背景颜色
width = 200
height = 50
background_color = get_random_color()
1.2 创建画布对象
image = Image.new('RGB', (width, height), background_color)
1.3 创建画笔对象
draw = ImageDraw.Draw(image)
1.4 调用画笔的point()函数绘制噪点
for i in range(0, 100):
xy = (random.randrange(0, width), random.randrange(0, height))
draw.point(xy, fill=get_random_color())
1.5 调用画笔的line()函数制造线
for i in range(0, 10):
xy_start = (random.randrange(0, width), random.randrange(0, height))
xy_end = (random.randrange(0, width), random.randrange(0, height))
draw.line((xy_start, xy_end), fill=get_random_color())
2 用draw.text书写文字
rand_python = ''
for i in range(4):
random_number = str(random.randint(0, 9))
random_lower_letter = chr(random.randint(97, 122))
random_upper_letter = chr(random.randint(65, 90))
rand_python += random.choice([random_number, random_lower_letter, random_upper_letter,])
color = get_random_color()
text_color = [0, 0, 0]
#
for j in range(2):
if color[j]-background_color[j] <= 30:
text_color[j] = 255-color[j]
else:
text_color[j] = color[j]
draw.text((i * (width/4) + 10, 2),
rand_python[i],
tuple(text_color),
font=ImageFont.truetype(r'C:\Windows\Fonts\BRADHITC.TTF', 40),
align='center')
3 释放画笔
del draw
存入session,用于做进一步的验证
request.session['verification_code'] = rand_python
内存文件操作
buf = BytesIO()
将图片保存在内存中，文件类型为png
image.save(buf, 'png')
将内存中的图片数据返回给客户端，MIME类型为图片png
return HttpResponse(buf.getvalue(), 'image/png')
我想要达到的结果
把内存中的图片取出来
