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Backporting Python 3 open(encoding=“utf-8”) to Python 2
...ython 2.6 and 2.7 you can use io.open instead of open. io is the new io subsystem for Python 3, and it exists in Python 2,6 ans 2.7 as well. Please be aware that in Python 2.6 (as well as 3.0) it's implemented purely in python and very slow, so if you need speed in reading files, it's not a good opt...
How do I drop table variables in SQL-Server? Should I even do this?
...
@JNKs point about them being unaffected by transactions is important, you can use table variables to hold data and write to a log table after an error causes a rollback.
– HLGEM
Apr 13 '11 at 18...
FFmpeg: How to split video efficiently?
...est4.mkv
Which outputs...
Two commands
real 0m16.201s
user 0m1.830s
sys 0m1.301s
real 0m43.621s
user 0m4.943s
sys 0m2.908s
One command
real 0m59.410s
user 0m5.577s
sys 0m3.939s
I tested a SD & HD file, after a few runs & a little maths.
Two commands SD 0m53.94 #2 wins ...
Scala 2.8 breakOut
...hat would produce an intermediary List[(Int, String)] collection, and then convert it.
Given that map uses a Builder to produce the resulting collection, wouldn't it be possible to skip the intermediary List and collect the results directly into a Map? Evidently, yes, it is. To do so, however, we n...
Deleting folders in python recursively
... delete a file, if it is read only. therefore, one can use -
import os, sys
import stat
def del_evenReadonly(action, name, exc):
os.chmod(name, stat.S_IWRITE)
os.remove(name)
if os.path.exists("test/qt_env"):
shutil.rmtree('test/qt_env',onerror=del_evenReadonly)
...
Compression/Decompression string with C#
... doing compression and decompression string in C#. There is a XML and I am converting in string and after that I am doing compression and decompression.There is no compilation error in my code except when I decompression my code and return my string, its returning only half of the XML.
...
What does if __name__ == “__main__”: do?
... foo2.py on the command-line? Why?
# Suppose this is foo2.py.
import os, sys; sys.path.insert(0, os.path.dirname(__file__)) # needed for some interpreters
def functionA():
print("a1")
from foo2 import functionB
print("a2")
functionB()
print("a3")
def functionB():
print("b...
How can I time a code segment for testing performance with Pythons timeit?
...the connection. Once you have your code working correctly is the correct point at which to think about using timeit on it!
Specifically, if the function you want to time is a parameter-less one called foobar you can use timeit.timeit (2.6 or later -- it's more complicated in 2.5 and before):
timei...
Find the nth occurrence of substring in a string
...on is going to be very inefficient for large strings when the match you're interested is near the beginning. It always looks at the whole string. It's clever but I wouldn't recommend this to someone who is new to Python and just wants to learn a good way to do it.
– Mark Byers
...
How to find current transaction level?
...alizable'
WHEN 5 THEN 'Snapshot' END AS TRANSACTION_ISOLATION_LEVEL
FROM sys.dm_exec_sessions
where session_id = @@SPID
docs.microsoft.com reference for the constant values.
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