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Making Python loggers output all messages to stdout in addition to log file
...e default stderr) and adding it to the root logger:
import logging
import sys
root = logging.getLogger()
root.setLevel(logging.DEBUG)
handler = logging.StreamHandler(sys.stdout)
handler.setLevel(logging.DEBUG)
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
h...
Starting python debugger automatically on error
...ou can use traceback.print_exc to print the exceptions traceback. Then use sys.exc_info to extract the traceback and finally call pdb.post_mortem with that traceback
import pdb, traceback, sys
def bombs():
a = []
print a[0]
if __name__ == '__main__':
try:
bombs()
except:
...
Can modules have properties the same way that objects can?
...You can make Python believe such an instance is a module by stashing it in sys.modules[thename] = theinstance. So, for example, your m.py module file could be:
import sys
class _M(object):
def __init__(self):
self.c = 0
def afunction(self):
self.c += 1
return self....
Parsing JSON with Unix tools
...
You can also do this with tools that are likely already installed on your system, like Python using the json module, and so avoid any extra dependencies, while still having the benefit of a proper JSON parser. The following assume you want to use UTF-8, which the original JSON should be encoded in ...
Printing Python version in output
...
Try
import sys
print(sys.version)
This prints the full version information string. If you only want the python version number, then Bastien Léonard's solution is the best. You might want to examine the full string and see if you need...
conflicting types for \'dev_t\'的原因 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...这种问题，这貌似是一个Linux历史遗留问题:
/usr/include/sys/types.h:62: error: conflicting types for ‘dev_t’
/usr/include/linux/types.h:13: error: previous declaration of ‘dev_t’ was here
/usr/include/sys/types.h:67: error: conflicting types for ‘gid...
Search of table names
...
select name
from DBname.sys.tables
where name like '%xxx%'
and is_ms_shipped = 0; -- << comment out if you really want to see them
share
|
...
Maximum number of threads per process in Linux?
...ds per process limit, just a limit on the total number of processes on the system (threads are essentially just processes with a shared address space on Linux) which you can view like this:
cat /proc/sys/kernel/threads-max
The default is the number of memory pages/4. You can increase this like:
...
How do I get the path and name of the file that is currently executing?
...spect.stack()[0][1])) # C:\filepaths\lib
Here's to these being added to sys as functions! Credit to @Usagi and @pablog
Based on the following three files, and running main.py from its folder with python main.py (also tried execfiles with absolute paths and calling from a separate folder).
C:\f...
Associative arrays in Shell scripts
...without writing a script, that has these properties. Stumped? It's the filesystem.
Really, all you need to have an associative array in shell programming is a temp directory. mktemp -d is your associative array constructor:
prefix=$(basename -- "$0")
map=$(mktemp -dt ${prefix})
echo >${map}/key...