基于使用Pycairo创建PDF(调整大小)PNG图像的问题 - 重新缩放Surface问题我试图创建重新调整图像并将图像放置在特定位置的代码,如下面的代码所示(在本例中,例如,图像应显示在"基础矩形"的"上方".但是,我似乎无法让图像显示在正确的位置.
我很高兴知道我必须改变什么,以便正确地缩放和定位图像.
import cairo
if not cairo.HAS_PDF_SURFACE:
raise SystemExit('cairo was not compiled with PDF support')
def draw_image(ctx, image, top, left, height, width):
"""Draw a scaled image on a given context."""
image_surface = cairo.ImageSurface.create_from_png(image)
# calculate proportional scaling
img_height = image_surface.get_height()
img_width = image_surface.get_width()
width_ratio = float(width) / float(img_width)
height_ratio = float(height) / float(img_height)
scale_xy = min(height_ratio, width_ratio)
# scale image and add it
ctx.save()
ctx.scale(scale_xy, scale_xy)
ctx.translate(left, top)
ctx.set_source_surface(image_surface)
ctx.paint()
ctx.restore()
def …根据Pandas社区页面(http://pandas.pydata.org/community.html),我首先在这里发帖...
我正在尝试使用pip在运行Ubuntu 12.04.3(64位)的vanilla远程服务器上的虚拟环境中安装Pandas.我已经安装了通常的嫌疑人(python-dev(2.7),numpy,scipy).Pandas没有安装,我不确定要更改或添加什么以确保发生这种情况.
我已经看到其他引用(没有相同的错误)暗示内存可能是一个问题; 远程服务器(Digital Ocean Droplet)只有512MB.
点差错误日志的尾部如下所示:
gcc: internal compiler error: Killed (program cc1)
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.6/README.Bugs> for instructions.
error: command 'gcc' failed with exit status 4
----------------------------------------
Command /srv/tp/venv/bin/python -c "import setuptools;__file__='/srv/tp/venv/build/pandas/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --single-version-externally-managed --record /tmp/pip-0bOHrG-record/install-record.txt --install-headers /srv/tp/venv/include/site/python2.7 failed with error code 1 in /srv/tp/venv/build/pandas
Exception information:
Traceback (most recent call last):
File "/srv/tp/venv/local/lib/python2.7/site-packages/pip-1.1-py2.7.egg/pip/basecommand.py", line 104, in main
status = self.run(options, args)
File …