小编Ray*_*ond的帖子

现在,我正在尝试按照本教程:

http://honza.ca/2011/05/deploying-django-with-nginx-and-gunicorn

模板站点正确加载,但图像不加载.这是我的应用程序的config.py文件的一部分:

# Absolute filesystem path to the directory that will hold user-uploaded files.
# Example: "/home/media/media.lawrence.com/media/"
MEDIA_ROOT = ''

# URL that handles the media served from MEDIA_ROOT. Make sure to use a
# trailing slash.
# Examples: "http://media.lawrence.com/media/", "http://example.com/media/"
MEDIA_URL = ''

# Absolute path to the directory static files should be collected to.
# Don't put anything in this directory yourself; store your static files
# in apps' "static/" subdirectories and in STATICFILES_DIRS.
# Example: "/home/media/media.lawrence.com/static/" …

我想知道是否有办法用Python(或其他语言)确定打开JPEG文件,并确定它是否已损坏(例如,如果我在JPG文件完成之前终止下载,那么我我无法打开文件并查看它)？是否有库可以轻松完成？

我正在尝试使用Apache Pig Latin进行一些日志处理,我想知道是否有更简单的方法来执行此操作:

filtered_logs = FOREACH logs GENERATE numDay, reqSize, optimizedSize, origSize, compressionPct, cacheStatus;

grouped_logs = GROUP filtered_logs BY numDay;

results = FOREACH grouped_logs GENERATE group,
(SUM(filtered_logs.reqSize) + SUM(filtered_logs.optimizedSize)) / 1048576.00 AS     ClientThroughputMB,
(SUM(filtered_logs.reqSize) + SUM(filtered_logs.origSize)) / 1048576.00 AS ServerThroughputMB,
SUM(filtered_logs.origSize) / 1048576.00 AS OrigMB,
SUM(filtered_logs.optimizedSize) / 1048576.00 AS OptMB,
SUM(filtered_logs.reqSize) / 1048576.00 AS SentMB,
AVG(filtered_logs.compressionPct) AS CompressionAvg,
COUNT(filtered_logs) AS NumLogs;

cache_hit_logs = FILTER filtered_logs BY cacheStatus MATCHES '.*HIT.*';

grouped_cache_hit_logs = GROUP cache_hit_logs BY numDay;

cache_hits = FOREACH grouped_cache_hit_logs GENERATE …