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How do I get the row count of a pandas DataFrame?
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MongoDB: Find a document by non-existence of a field?
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SQL - The conversion of a varchar data type to a datetime data type resulted in an out-of-range valu
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add a string prefix to each value in a string column using Pandas
...gt;>> df = pd.DataFrame({'col':['a',0]})
>>> df
col
0 a
1 0
>>> df['col'] = 'str' + df['col'].astype(str)
>>> df
col
0 stra
1 str0
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.NET 4.0 has a new GAC, why?
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Yes since there are 2 distinct Global Assembly Cache (GAC), you will have to manage each of th...
pip issue installing almost any library
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I found it sufficient to specify the pypi host as trusted. Example:
pip install --trusted-ho...
Get Image size WITHOUT loading image into memory
... load the image into memory when calling .open. Looking at the docs of PIL 1.1.7, the docstring for .open says:
def open(fp, mode="r"):
"Open an image file, without loading the raster data"
There are a few file operations in the source like:
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prefix = fp.read(16)
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fp.seek(0)
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Select n random rows from SQL Server table
...() , and then selecting from that table where the random number column < 0.1. I'm looking for a simpler way to do it, in a single statement if possible.
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Is it possible to use jQuery to read meta tags
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Just use something like:
var author = $('meta[name=author]').attr("content");
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How does the static modifier affect this code?
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In Java two phases take place: 1. Identification, 2. Execution
In identification phase all st...