I’m trying to write a program to add up the numbers from 1 to n. I’ve managed to get it to print the numbers several times but not to add them all. It keeps on just adding two of the numbers. My 1st attempt is: How can I fix this problem? For the recursive version of this question, see Recursive
Pandas – converting yes : no to True : False failing
My best efforts to convert a column with ‘yes’ ‘no’ values to True, False or 1 , 0 are failing. The column is ‘subscribed’. Tried the following. None of them worked: Answer As EdChum points out you need to assign back to the df. Input: Output:
Pythonic type hints with pandas?
Let’s take a simple function that takes a str and returns a dataframe: What is the recommended pythonic way of adding type hints to this function? If I ask python for the type of a DataFrame it returns pandas.core.frame.DataFrame. The following won’t work though, as it’ll tell me that pandas…
PyInstaller with Pandas creates over 500 MB exe
I try to create an exe file using PyInstaller 3.2.1, for test purpose I tried to make an exe for following code: After considerable amount of time (15mins +) I finished with dist folder as big as 620 MB and build – 150 MB. I work on Windows using Python 3.5.2 |Anaconda custom (64-bit). Might be worth no…
How does one detect if one is running within a docker container within Python?
I was trying to find out if my script was running inside a docker container or not within the python script. Something like: to do this the only hacky way I found out how to do it is that I can inspect the hostname (with platform.node()) and if the hostname is not the same as my computer then its not
PySpark: Get first Non-null value of each column in dataframe
I’m dealing with different Spark DataFrames, which have lot of Null values in many columns. I want to get any one non-null value from each of the column to see if that value can be converted to datetime. I tried doing df.na.drop().first() in a hope that it’ll drop all rows with any null value, and…
MongoEngine: Close connection
I spent ages trying to find a simple example where MongoEngine was being used and a connection was being closed. Finally figured it out and posting my code. Answer I know this is an old question, but if anyone else is searching I figured I’d give an alternate answer. close() does not actually remove the…
Django Rest Framework – AssertionError Fix your URL conf, or set the `.lookup_field` attribute on the view correctly
I’m trying to return a single object specific to a user (not a queryset), without having to specify an identifier/pk within the requested URL. Each user has an organisation FK. i.e. http://website/organisation and not http://website/organisation/1 I’m receiving the following error, since it’…
Cannot import models from another app in Django
so I have 2 apps running in the same project. My files are structured as follows: So, I for some weird reason have a different name for my base directory (that is, it ends with codebase). Hopefully, that is not an issue. In my settings.py, I have this: Ok, so in my models.py (from app2), I can easily import m…
TypeError: generatecode() takes 0 positional arguments but 1 was given
I have the code below: Then, I got the error below: TypeError: generatecode() takes 0 positional arguments but 1 was given So, how can I solve the error? Answer When you call a method on a class (such as generatecode() in this case), Python automatically passes self as the first argument to the function. So w…