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Export specific rows from a PostgreSQL table as INSERT SQL script
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Create a table with the set you want to export and then use the command line utility pg_dump to export to a file:
create table export_table as
select id, name, city
from nyummy.cimory
where city = 'tokyo'
$ pg_dump --table=export_table --data-only --column-inserts my_database > data.sql
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What is the difference between NaN and None?
I am reading two columns of a csv file using pandas readcsv() and then assigning the values to a dictionary. The columns contain strings of numbers and letters. Occasionally there are cases where a cell is empty. In my opinion, the value read to that dictionary entry should be None but instead ...
Python Logging (function name, file name, line number) using a single file
I am trying to learn how an application works. And for this I am inserting debug commands as the first line of each function's body with the goal of logging the function's name as well as the line number (within the code) where I send a message to the log output. Finally, since this application comp...
python pandas: apply a function with arguments to a series
I want to apply a function with arguments to a series in python pandas:
4 Answers
4
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How to save traceback / sys.exc_info() values in a variable?
I want to save the name of the error and the traceback details into a variable. Here's is my attempt.
5 Answers
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Get an OutputStream into a String
...hat's the best way to pipe the output from an java.io.OutputStream to a String in Java?
5 Answers
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API Keys vs HTTP Authentication vs OAuth in a RESTful API
I'm working on building a RESTful API for one of the applications I maintain. We're currently looking to build various things into it that require more controlled access and security. While researching how to go about securing the API, I found a few different opinions on what form to use. I've seen ...
Calling startActivity() from outside of an Activity?
I'm using an AlarmManager to trigger an intent that broadcasts a signal. The following is my code:
9 Answers
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How to exclude this / current / dot folder from find “type d”
can be used to find all directories below some start point. But it returns the current directory ( . ) too, which may be undesired. How can it be excluded?
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Default initialization of std::array?
...ave the guarantee that the syntax std::array<T, N> x; will default-initialize all the elements of the array ?
5 Ans...