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How to filter SQL results in a has-many-through relation
Assuming I have the tables student , club , and student_club :
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How to determine whether a Pandas Column contains a particular value
I am trying to determine whether there is an entry in a Pandas column that has a particular value. I tried to do this with if x in df['id'] . I thought this was working, except when I fed it a value that I knew was not in the column 43 in df['id'] it still returned True . When I subset to a data...
How do I measure request and response times at once using cURL?
I have a web service that receives data in JSON format, processes the data, and then returns the result to the requester.
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Bash command to sum a column of numbers [duplicate]
I want a bash command that I can pipe into that will sum a column of numbers. I just want a quick one liner that will do something essentially like this:
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Convert PHP closing tag into comment
One of the lines in my script contains a PHP closing tag inside a string. Under normal operation this does not cause a problem, but I need to comment out the line.
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How to write to a file, using the logging Python module?
How can I use the logging module in Python to write to a file? Every time I try to use it, it just prints out the message.
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Pandas - How to flatten a hierarchical index in columns
I have a data frame with a hierarchical index in axis 1 (columns) (from a groupby.agg operation):
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Python: most idiomatic way to convert None to empty string?
What is the most idiomatic way to do the following?
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What's the difference between %s and %d in Python string formatting?
I don't understand what %s and %d do and how they work.
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How to find the operating system version using JavaScript?
How can I find the OS name and OS version using JavaScript?
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