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Remove duplicate dict in list in Python
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How to get first and last day of previous month (with timestamp) in SQL Server
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228
select DATEADD(MONTH, DATEDIFF(MONTH, 0, GETDATE())-1, 0) --First day of previous month
select...
Get index of array element faster than O(n)
... Hash[array.map.with_index.to_a] # => {"a"=>0, "b"=>1, "c"=>2}
hash['b'] # => 1
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Print a list in reverse order with range()?
...rameters. range(start, stop, step)
For example, to generate a list [5,4,3,2,1,0], you can use the following:
range(5, -1, -1)
It may be less intuitive but as the comments mention, this is more efficient and the right usage of range for reversed list.
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Invalid syntax when using “print”? [duplicate]
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232
That is because in Python 3, they have replaced the print statement with the print function.
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Python - Count elements in list [duplicate]
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edited Dec 4 '14 at 23:26
Charlie
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answered Nov 9 '10 at ...
How do we determine the number of days for a given month in python [duplicate]
...ulate the number of days for a given month in python. If a user inputs Feb 2011 the program should be able to tell me that Feb 2011 has 28 days. Could any one tell me which library I should use to determine the length of a given month.
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Iterating over a numpy array
...think you're looking for the ndenumerate.
>>> a =numpy.array([[1,2],[3,4],[5,6]])
>>> for (x,y), value in numpy.ndenumerate(a):
... print x,y
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0 0
0 1
1 0
1 1
2 0
2 1
Regarding the performance. It is a bit slower than a list comprehension.
X = np.zeros((100, 100, 100))
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Use a list of values to select rows from a pandas dataframe [duplicate]
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1273
You can use isin method:
In [1]: df = pd.DataFrame({'A': [5,6,3,4], 'B': [1,2,3,5]})
In [2]:...
xml2-config not found. Please check your libxml2 installation - 更多技...
xml2-config not found. Please check your libxml2 installation安装php时报错：checking libxml2 install dir... nochecking for xml2-config path... configure: error: xml2-config not fo...安装php时报错：
checking libxml2 install dir... no
checking for xml2-config path...
configure: error...