大约有 16,000 项符合查询结果（耗时：0.0241秒） [XML]
How to check which locks are held on a table
...ock is still available, but deprecated, so it's now recommended to use the sys.dm_tran_locks view for this kind of thing. You can find an example of how to "roll your own" sp_lock function here.
share
|
...
In Python script, how do I set PYTHONPATH?
...
You don't set PYTHONPATH, you add entries to sys.path. It's a list of directories that should be searched for Python packages, so you can just append your directories to that list.
sys.path.append('/path/to/whatever')
In fact, sys.path is initialized by splitting the...
Remove and Replace Printed items [duplicate]
...
sys.stdout.write("\033[K") to clear the previous print
– user2742371
Mar 9 '18 at 13:39
...
py2exe - generate single executable file
...so that will explain some of the os.system calls i'm using.
First I tried converting all my images into bitmats and then all my data files into text strings.
but this caused the final exe to be very very large.
After googleing for a week i figured out how to alter py2exe script to meet my needs.
...
logger configuration to log to file and print to stdout
...err, you just need to specify it to the StreamHandler constructor.
import sys
# ...
logging.getLogger().addHandler(logging.StreamHandler(sys.stdout))
You could also add a Formatter to it so all your log lines have a common header.
ie:
import logging
logFormatter = logging.Formatter("%(asctime)s...
How to calculate the number of occurrence of a given character in each row of a column of strings?
...ingr package provides the str_count function which seems to do what you're interested in
# Load your example data
q.data<-data.frame(number=1:3, string=c("greatgreat", "magic", "not"), stringsAsFactors = F)
library(stringr)
# Count the number of 'a's in each element of string
q.data$number.of.a...
Comparing two dataframes and getting the differences
... lists, to do it efficiently we should first order them then compare them (converting the list to sets/hashing would also be fast; both are an incredible improvement to the simple O(N^2) double comparison loop
Note: the following code produces the tables:
df1=pd.DataFrame({
'Date':['2013-11-24...
When to use os.name, sys.platform, or platform.system?
As far as I know, Python has 3 ways of finding out what operating system is running on:
5 Answers
...
__getattr__ on a module
... them, and so the existing hack (a module replacing itself with a class in sys.modules at import time) should be no longer necessary.
In Python 3.7+, you just use the one obvious way. To customize attribute access on a module, define a __getattr__ function at the module level which should accept o...
How to fix “Attempted relative import in non-package” even with __init__.py
...hin the same package. There's no way to relatively import from "the whole system". I'm not even sure why you'd want to do this.
– BrenBarn
Jul 8 '13 at 17:46
2
...