我正在尝试像这样导入和使用 python 枕头库:
from urllib.request import urlopen
import PIL
from PIL import Image, ImageFont, ImageDraw
import re
image = Image.open(urlopen("http://randomurl.com/randomimage.jpg"))
draw = ImageDraw.Draw(image)
font = ImageFont.truetype("sans-serif.ttf", 16)
draw.text((0, 0),"This is the future liberals want",(255,255,255),font=font)
image.save('sample-out.jpg')
但是，我收到以下错误:
/opt/bot/app # python cli.py
Retrieving column Image ID on worksheet History
Traceback (most recent call last):
File "cli.py", line 38, in <module>
font = ImageFont.truetype("sans-serif.ttf", 16)
File "/usr/local/lib/python3.7/site-packages/PIL/ImageFont.py", line 260, in truetype
return FreeTypeFont(font, size, index, encoding, layout_engine)
File "/usr/local/lib/python3.7/site-packages/PIL/ImageFont.py", line 135, in __init__
if core.HAVE_RAQM:
File "/usr/local/lib/python3.7/site-packages/PIL/ImageFont.py", line 39, in __getattr__
raise ImportError("The _imagingft C module is not installed")
ImportError: The _imagingft C module is not installed
我知道之前在 StackOverflow 上有人问过类似的问题。但是，所有答案似乎都与我不针对的执行环境有关。我在 python:3.7-rc-alpine3.7 docker 图像中运行它，现有的答案不起作用。这是我安装的 pip 和 apk 包:http://dpaste.com/3EBW3A1
请您参考如下方法:
我们需要安装编译器(g++)、TrueType字体渲染库(freetype-dev)和加速基线JPEG压缩解压库(jpeg-dev ) 在 Alpine 平台上编译 pillow。
Dockerfile部分是:
FROM python:3.7-rc-alpine3.7
RUN apk add --no-cache g++ freetype-dev jpeg-dev
RUN pip install pillow
