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    Thread: using function in np.where
Post: RE: using function in np.where

But I would then be passing an array to the function and the function would have to work on the entire array and return a modified array -> np.where would then have to handle that this gets passed ...
glidecode General Coding Help 6 667 Feb-18-2022, 08:19 AM
    Thread: using function in np.where
Post: RE: using function in np.where

Each row in my dataframe is for a certain date and I'm looking to only call the function on dates where it's relevant, to save computation power. So I need to pass the date (different for each row) a...
glidecode General Coding Help 6 667 Feb-17-2022, 07:14 PM
    Thread: using function in np.where
Post: using function in np.where

I'm using np.where and trying to reference a function call instead of putting in a static value, something like: np.where(condition,function(arg1,arg2),0) | so if conditions returns true: call functio...
glidecode General Coding Help 6 667 Feb-17-2022, 06:48 PM
    Thread: Filter dataframe by datetime.date column
Post: RE: Filter dataframe by datetime.date column

Thanks for the input! I have a further problem I have a separate dataframe where the "date" column is in the format: <class 'pandas._libs.tslibs.timestamps.Timestamp'> I want to filter the da...
glidecode General Coding Help 2 1,260 Dec-05-2021, 12:51 AM
    Thread: Filter dataframe by datetime.date column
Post: Filter dataframe by datetime.date column

I usually filter for data like this: df[df.somecolumn > 10] However, I haven't been able to do this for a column I have in type "datetime.date" If I do: df[df["date"] == "2020-11-30"]) I get noth...
glidecode General Coding Help 2 1,260 Dec-04-2021, 05:11 PM
    Thread: List of dataframe values beginning with x,y or z
Post: RE: List of dataframe values beginning with x,y or...

I figured out the problem! It is described here: https://cumsum.wordpress.com/2021/05/05/...type-bool/ Simply, the expression is interpreted with priority to the "|" - so in my example, it will look...
glidecode General Coding Help 3 847 Nov-08-2021, 10:16 PM
    Thread: List of dataframe values beginning with x,y or z
Post: RE: List of dataframe values beginning with x,y or...

It then gives me this error (which I have run into many times today): ValueError: The truth value of a Series is ambiguous. Use a.empty, a.bool(), a.item(), a.any() or a.all().
glidecode General Coding Help 3 847 Nov-08-2021, 08:52 PM
    Thread: List of dataframe values beginning with x,y or z
Post: List of dataframe values beginning with x,y or z

I have found a way to return all rows of a specified column in a data frame beginning with letter x. The following will return a new dataframe reduced to the specified column and for row where the exp...
glidecode General Coding Help 3 847 Nov-08-2021, 08:30 PM
    Thread: Basic storage of function values for monte carlo simulation
Post: Basic storage of function values for monte carlo s...

I'm testing out some simple monte carlo simulations which I'd like to plot on a graph. Here is an idea about how to do this: 1) Create an empty dataframe to store values 2) Run loop and for each ru...
glidecode Data Science 1 1,050 Apr-14-2020, 09:19 PM
    Thread: Curiosity about lower levels in programming
Post: RE: Curiosity about lower levels in programming

I have started reading in this book written by the guys behind Nand2Tetris (It has very solid reviews!): https://www.amazon.com/Elements-Computin...ef=ed_oe_p
glidecode News and Discussions 10 3,367 Sep-08-2018, 09:02 PM
    Thread: Curiosity about lower levels in programming
Post: RE: Curiosity about lower levels in programming

Thanks for your input Larz, very interesting. I will look into some of that. I have heard good things about Nand2Tetris before and looked at their site. Definitely something to consider looking into...
glidecode News and Discussions 10 3,367 Sep-07-2018, 11:00 AM
    Thread: Curiosity about lower levels in programming
Post: RE: Curiosity about lower levels in programming

Interesting answer Griboullis. I have watched a few good videos explaining some of the very basics and while interesting it can be tedious. Maybe the boredom of some of the small details will cancel o...
glidecode News and Discussions 10 3,367 Sep-06-2018, 09:21 AM
    Thread: Curiosity about lower levels in programming
Post: RE: Curiosity about lower levels in programming

Could we move the thread to another location on the forum?
glidecode News and Discussions 10 3,367 Sep-05-2018, 11:15 PM
    Thread: Curiosity about lower levels in programming
Post: Curiosity about lower levels in programming

Hi everyone Ever since I started learning and doing some programming I have had an extreme curiosity about the lower levels of programming. While programming or reading about programming in python (o...
glidecode News and Discussions 10 3,367 Sep-05-2018, 10:36 PM
    Thread: Developing as a programmer by coding actual work
Post: Developing as a programmer by coding actual work

Hi all I have been looking into python for a while and made some small scripts for my own use. This can be a fine way to learn and improve - any coding > just reading. However I have started thin...
glidecode News and Discussions 0 1,453 May-06-2018, 01:12 PM
    Thread: x.sum() VS sum(x) - Calling a function
Post: RE: x.sum() VS sum(x) - Calling a function

I had copied the same text twice. I have changed it now. The title of the thread points to the difference.
glidecode General Coding Help 2 2,199 Mar-27-2018, 06:27 PM
    Thread: x.sum() VS sum(x) - Calling a function
Post: x.sum() VS sum(x) - Calling a function

I think there's something rather fundamental I have missed regarding calling functions. I need to fill a column in one dataframe with the sum of the columns in another dataframe. First I did somethi...
glidecode General Coding Help 2 2,199 Mar-27-2018, 04:13 PM
    Thread: pandas DataReader error on all data sources
Post: RE: pandas DataReader error on all data sources

Thanks a lot! I hadn't thought about checking my version of pandas-datareader and sure enough it was 0.2 or so. Installing with pip directly didn't upgrade it for me. Though uninstalling and reinsta...
glidecode Data Science 5 15,105 Mar-06-2018, 01:38 PM
    Thread: pandas DataReader error on all data sources
Post: pandas DataReader error on all data sources

I have previously used the DataReader in pandas with various data sources. Now Google and Yahoo are more or less deprecated, however I can't get data from any source. The error I get: NotImplement...
glidecode Data Science 5 15,105 Mar-06-2018, 01:01 AM
    Thread: urllib urlopen getting error 400 on 1 specific page
Post: RE: urllib urlopen getting error 400 on 1 specific...

Thanks to both of you. And yes Snipsatt they have an API, but it's expensive and I actually use this mostly to learn another part of programming.
glidecode Web Scraping & Web Development 4 2,832 Mar-01-2018, 11:01 PM

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