大约有 43,100 项符合查询结果（耗时：0.0745秒） [XML]
Is it possible to install another version of Python to Virtualenv?
...
12 Answers
12
Active
...
How to check SQL Server version
...
Following are possible ways to see the version:
Method 1: Connect to the instance of SQL Server, and then run the following query:
Select @@version
An example of the output of this query is as follows:
Microsoft SQL Server 2008 (SP1) - 10.0.2531.0 (X64) Mar 29 2009
10:11:5...
Sequence contains more than one element
... This method will only succeed when the collections contains exactly 0 or 1 element. I believe you are looking for FirstOrDefault which will succeed no matter how many elements are in the collection.
share
|
...
super() fails with error: TypeError “argument 1 must be type, not classobj” when parent does not inh
...his is why you got the error message you saw:
TypeError: super() argument 1 must be type, not classobj
Try this to see for yourself:
class OldStyle:
pass
class NewStyle(object):
pass
print type(OldStyle) # prints: <type 'classobj'>
print type(NewStyle) # prints <type 'type'&g...
Using try vs if in python
...surements:
>>> import timeit
>>> timeit.timeit(setup="a=1;b=1", stmt="a/b") # no error checking
0.06379691968322732
>>> timeit.timeit(setup="a=1;b=1", stmt="try:\n a/b\nexcept ZeroDivisionError:\n pass")
0.0829463709378615
>>> timeit.timeit(setup="a=1;b=0", stmt=...
What's the difference between Task.Start/Wait and Async/Await?
...
answered Mar 1 '12 at 16:04
Eric LippertEric Lippert
599k164164 gold badges11551155 silver badges20142014 bronze badges
...
if else in a list comprehension [duplicate]
...
>>> l = [22, 13, 45, 50, 98, 69, 43, 44, 1]
>>> [x+1 if x >= 45 else x+5 for x in l]
[27, 18, 46, 51, 99, 70, 48, 49, 6]
Do-something if <condition>, else do-something else.
...
Principal component analysis in Python
...
11 Answers
11
Active
...