Django NewbieMistakes PROBLEM You’re using SQLite3, your DATABASE_NAME is set to the database file’s full path, the database file is writeable by Apache, but you still get the above error. SOLUTION Make sure Apache can also write to the parent directory of the database. SQLite needs to be able to write to this directory. Make … Read more
I use groupby and size Timing 1,000,000 rows
Another simple way is to use the pandas.DataFrame.pivot function to format the data. Use pandas.DataFrame.plot to plot. Providing the colors in the ‘color’ column exist in matplotlib: List of named colors, they can be passed to the color parameter.
What this does is calculate the longest data entry to determine the column width, then use .ljust() to add the necessary padding when printing out each column.
I know this question have been asked several times, but none of the solutions I saw solved my problem. I have been trying to use the serial library from Sublime Text 2 in my mac. Everytime I call this library, I get this message: I already installed python 3 and pyserial I am new using … Read more
What is the production.py file? How do you import your settings? Depending on how you got this error (serving django through a wsgi server or on the command line), check for manage.py or wsgi.py to see what is the name of the default settings file. If you want to manuallly set the settings to use, … Read more
In Windows, you will have to set the path to the location where you installed Anaconda3 to. For me, I installed anaconda3 into C:\Anaconda3. Therefore you need to add C:\Anaconda3 as well as C:\Anaconda3\Scripts\ to your path variable, e.g. set PATH=%PATH%;C:\Anaconda3;C:\Anaconda3\Scripts\. You can do this via powershell (see above, https://msdn.microsoft.com/en-us/library/windows/desktop/bb776899(v=vs.85).aspx ), or hit the windows … Read more
According to the flask.Request.args documents. flask.Request.argsA MultiDict with the parsed contents of the query string. (The part in the URL after the question mark). So the args.get() is method get() for MultiDict, whose prototype is as follows: In newer version of flask (v1.0.x and v1.1.x), flask.Request.args is an ImmutableMultiDict(an immutable MultiDict), so the prototype and specific method above are still valid.
No, but you can use upside-down floor division:¹ This works because Python’s division operator does floor division (unlike in C, where integer division truncates the fractional part). Here’s a demonstration: Why this instead of math.ceil? math.ceil(a / b) can quietly produce incorrect results, because it introduces floating-point error. For example: In general, it’s considered good practice to avoid … Read more