PYTHON QUESTIONS

will be helpful for those in need I have multiple 5x5 arrays which are contained within one large array - the overarching shape is: 5 x 5 x 29. I want to sum every 5 x 5 array to produce one single array, instead of 29 single arrays. , Assuming you a

TAG : python

Date : December 02 2020, 10:46 PM , By : peacocktail

Count word/pos from file

wish of those help I've almost solved an exercise from my python lectures. I've been asked to write a program that counts how often each word occurs in a file, and how often it has been tagged with which POS. The counts should be written to a new fil

TAG : python

Date : December 02 2020, 10:46 PM , By : Asger

Get xpath to tag which contains certain text

will help you I am trying to find the xpath to some text on a webpage. If you were to go to https://www.york.ac.uk/teaching/cws/wws/webpage1.html and try and get the xpath of "EXERCISE" it would look like "html body html table tbody tr td div h4". If

TAG : python

Date : December 02 2020, 10:46 PM , By : user3045785

Add entries to pandas dataframe based on presence in a set

like below fixes the issue Use isin:

TAG : python

Date : December 02 2020, 10:46 PM , By : user3045708

How to find records with same value in one column but different value in another column

around this issue I have two pandas df with the exact same column names. One of these columns is named id_number which is unique to each table (What I mean is an id_number can only appear once in each df). I want to find all records that have the sam

TAG : python

Date : December 02 2020, 10:46 PM , By : user3045662

Flask shopping cart, how can i caclulate the total price of all the items in my cart

it fixes the issue I have successfully been able to add to basket using flask Sessions but I am having trouble with caclulating the total price of all the products. I have tried to set a varible which calculates the price using the value in the list

TAG : python

Date : December 02 2020, 10:46 PM , By : user3045656

Can't process links upto certain portion

like below fixes the issue There are two forward slashes after http://; therefore, you need to get the join the first three elements of the split:

TAG : python

Date : December 02 2020, 10:46 PM , By : user3045648

Pandas: Logical Operations with date

it should still fix some issue I'm new to python (2 weeks experience) , Convert date strings to datetime and compare:

TAG : python

Date : December 02 2020, 10:46 PM , By : interactivejunky

SQLAlchemy cursors: AttributeError: 'tuple' object has no attribute 'items'

it should still fix some issue I'm attempting to write an iterator to take in a query and export rows in batches as a list of dicts. Here's a complete example of what I'm working with: , Well, it seems the problem has to do with using a raw connectio

TAG : python

Date : December 02 2020, 10:46 PM , By : user3045635

Regarding dictionary value manipulation in python

wish of those help CONTEXT: The code is to be used for representing graphs for use in implementations of graph search algorithms (like Breadth-First Search). I want to store the graph in form of a dictionary, where keys represent the nodes and each k

TAG : python

Date : December 02 2020, 10:46 PM , By : user3045626

Python how to generate all pair-terms

seems to work fine The following approach can find the first 100 million terms in half a minute on my computer (printing them will take longer), and the memory usage for generating the first N terms is O(sqrt(N)).

TAG : python

Date : December 02 2020, 10:46 PM , By : Mubashir Zainoor

Why is my code looping twice when using keyboard?

I wish this helpful for you This is because keyboard.hook() will run its callback when you press a key and when you release it. Therefore, twice for every key press. You need to have it run just when a key is pressed:

TAG : python

Date : December 02 2020, 10:46 PM , By : Rajshri

Pipenv: What types of github reference can you use for the "ref" argument?

To fix this issue According to the pip documentation, you can use a "branch name, a commit hash, a tag name or a git ref". So any branch, tag, full ref, or commit hash is allowed.It may additionally be possible to use an arbitrary Git revision expres

TAG : python

Date : December 02 2020, 10:46 PM , By : user3045609

How to cope around memory overflow with Pivot table?

it fixes the issue One option is to use pandas Sparse functionality, since your data here is (very) sparse:

TAG : python

Date : December 02 2020, 10:46 PM , By : user3045608

How to show counts of null string-like column values in pandas

I hope this helps . The dataframe.describe() has the following columns for string like columns: , For a quick glance of number of nan in each columns:

TAG : python

Date : December 02 2020, 10:46 PM , By : mads

create seaborn plot with pandas of matplotlib

hope this fix your issue I'm struggling to (re)create a seaborn plot with pandas or matplotlib. , You can loop over the wage['Country']:

TAG : python

Date : December 02 2020, 10:46 PM , By : ls-free

pathlib Path `write_text` in append mode

fixed the issue. Will look into that further Not really, as you can see in the pathlib module exist 2 types of path classes: pure path classes {PurePath, PurePosixPath, PureWindowsPath} concrete path classes {Path, PosixPath, WindowsPath}.

TAG : python

Date : December 02 2020, 10:46 PM , By : user3045545

Why CPython pre-allocates some integer numbers?

like below fixes the issue Because the implementors of CPython have decided that that's a good range to have preallocated for perfomance reasons, as it covers the most commonly used integer values. There's nothing magical about the range [-5,256]. Th

TAG : python

Date : December 02 2020, 10:46 PM , By : user3045527

GPU volatility in keras very low

hop of those help? In short: you are not using the capabilities of keras.utils.Sequence, so although you specified 12 workers for multiprocessing, in fact you're only using 1 (you can check CPU usage to see how much core your code is using.

TAG : python

Date : December 02 2020, 10:46 PM , By : user3045485

How to view single row from csv with pandas

this one helps. David Makovoz has explained the issue already, so I'll just answer your very question:

TAG : python

Date : December 02 2020, 10:46 PM , By : user3045470

Connecting to flask app that runs on my pi

This might help you Assuming that your laptop can reach the Raspberry Pi normally, such as through SSH, then I suspect that Flask is only listening locally.

TAG : python

Date : December 02 2020, 10:46 PM , By : Dan Chamberlain

pyparsing - How to parse commas to use in functions

I hope this helps you . If you have a parser that parses a single integer in parentheses like this:

TAG : python

Date : December 02 2020, 10:46 PM , By : user3045459

How could I iterate over the elements of a list of tuples and get the elements as strings as a result?

may help you . I'm just trying to write a program which loads a workbook, iterates over the values of all the cells in two columns, format a string with the values read from those cells and writes the resulting formatted string to a new worksheet's c

TAG : python

Date : December 02 2020, 10:46 PM , By : user3045442

Trouble selecting records based on date in python/pandas

wish of those help The first thing that I can spot is your df_event['EventDate']. This needs to be once again converted into datetime format:

TAG : python

Date : December 02 2020, 10:46 PM , By : user3045434

Convert numpy slice to Opencv c++ Mat

this will help I have an array in python with shape (1, 17, 17, 5, 5). I need to get a subarray of this array: , I ended up using cv::Range to get the subarray I needed

TAG : python

Date : December 02 2020, 10:46 PM , By : Saran

Conditional renaming of multiple files from multiple subfolders based on a list of prefix

this will help I have a path with multiple subfolders, and files with different extensions. Now, I made different lists for each filetypes (files of different extensions) , You can use glob.glob

TAG : python

Date : December 02 2020, 10:46 PM , By : user3045404

Trouble scraping a website link using requests

I hope this helps . The site is using "asdf"-encoder (I'm not sure if that's official name). But using the reply from Converting JavaScript code to Python, you should be able to decode this string:

TAG : python

Date : December 02 2020, 10:46 PM , By : user3045401

I want to add dynamic input box on button click and then save the value into database (postgresql)

I think the issue was by ths following , Hello @Rimjhim Gupta as from what I understood you are trying to add elements dynamically on the page and then retrieve their values. I see two possible variants to solve this problem: 1) add a counter variabl

TAG : python

Date : December 02 2020, 10:46 PM , By : dave_vansoest

updating dictionary inside list of dicts, when comparing two another list of dict

seems to work fine I have two list of dictionaries and when a certain key matches, i want it to append the dict in the first list to the second, but when the dictionary gets big, it takes a very long time. Is there a faster way to do it? , When you m

TAG : python

Date : December 02 2020, 10:46 PM , By : user3045372

Python - metaclass changes variable scope from instance to class

Any of those help The instances of a metaclass are the classes that declare they will use it (and their subclasses). So when you do x.attr = 100 in Meta.__new__, x is a class (an instance of the metaclass, WithMeta in this case).That's different from

TAG : python

Date : December 02 2020, 10:46 PM , By : user3045369

Space between frames using tkinter pack geometry manager

I wish this helpful for you When you use expand, that tells tkinter to give unallocated space to that widget. When you set expand to True on more than one widget, the unallocated space is divided between all of the widgets with that option set to Tru

TAG : python

Date : December 02 2020, 10:46 PM , By : user3045365

create a plot from two dataframe with two y -axes

This might help you I want a plot with two y-axes from two different data frame in one plot. , Is this what you want:

TAG : python

Date : December 02 2020, 10:46 PM , By : hongelai

Global Variable is not Updating

around this issue My global variable is not updating, all it prints out is 0. Why is this happening? Are global variables bad practice? , You print it first, and only afterwards change its value. If you move

TAG : python

Date : December 01 2020, 04:52 PM , By : user3045532

How do i make python choose randomly one line after the first line of a file?

it helps some times Is it possible to make python to randomly choose a line EXCEPT the first line of the file which is reserved for something else? Any help appreciated :) , Slice the array:

TAG : python

Date : December 01 2020, 04:52 PM , By : user3045328

How to store value in variables while looping list of dicts

To fix this issue id["homeTeam"] and id["awayTeam"] aren't lists (there are no square brackets around them), they're just single dictionaries. So you don't need to loop over them.

TAG : python

Date : December 01 2020, 04:52 PM , By : user3045293

Deviation of a list from a reference value

Hope this helps I've got a reference value: , You could use numpy:

TAG : python

Date : December 01 2020, 04:52 PM , By : user3045288

Django login() doesn't persist after HttpResponseRedirect

will help you to @Sayse's suggestion about middleware/backends causing the issue. Removing 'users.backends.EmailOrUsernameModelBackend' fixed the issue in the question above, but consequently broke my login after a new user registers. In order to get

TAG : python

Date : December 01 2020, 04:52 PM , By : user3045274

Applying a function to a small dataframe: shape mismatch: value array of shape (4,) could not be broadcast

wish help you to fix your issue I'm trying to apply an API result to two columns. , Try to return a Series instead of a DataFrame:

TAG : python

Date : December 01 2020, 04:52 PM , By : user3045266

From views, how do I pass both context and registration form to my registration template?

I hope this helps . I'm fairly new to Django and I'm trying to pass both the context and my registration form. I know how to pass either the context, or the form, but not both. Check the last line of the code, that's what I'm trying to figure out. ,

TAG : python

Date : December 01 2020, 04:52 PM , By : Rich MacDonald

Create new DataFrame based on hours range of a column

hope this fix your issue You don't describe why you want to generate hour-specific slices of the raw data. In general, this would be considered bad practice or not pythonic.I suggest to group your data based on the hour using groupby which allows you

TAG : python

Date : December 01 2020, 04:52 PM , By : user3045246

Pandas Showing Unique Dates as Duplicates

will help you the output of df.duplicated by default will keep the first instance and only return the other duplicates. when you do it for time and you get two duplicates its not saying these two are duplciates of each other. Its saying these two rec

TAG : python

Date : December 01 2020, 04:52 PM , By : user3045230

Creating pandas DataFrame with nullable integer data type

should help you out It seems, one has to use the correct number of elements during the initialization if missing values are allowed:

TAG : python

Date : December 01 2020, 04:52 PM , By : user3045211

How to use Handwriting Recognition model as an API?

Hope this helps You were getting an error because you have not imported TensorFlow in your code or if you have imported you have not given an alias.

TAG : python

Date : December 01 2020, 04:52 PM , By : user3045207

how to convert a float number to 4 decimal places without any rounding?

may help you . Based on your expected output for the square root of 3, it seems that you really just want to truncate or extend the square root output to 4 decimal places (rather than round up or down). If that is the case, you could just format to 5

TAG : python

Date : December 01 2020, 04:52 PM , By : user3045177

Continuous calculation of the mean of values?

it helps some times I have a sequence of numbers coming into my application over a period of time, for example: [10, 8, 11, 9, 10, 8, 8, 11, 9, 8, 10, 11] , Yes, just keep the sum and the number of numbers so far

TAG : python

Date : December 01 2020, 04:52 PM , By : user3045176

Is there a way to identify floating NaN and then replacing them in pandas dataframe?

it helps some times I tried to identify NaNs in my dataframe and later removed them as they weren't necessary for this particular problem. Although now while performing another operation, I came across something called "floating NaN" and because of t

TAG : python

Date : December 01 2020, 04:52 PM , By : user3045159

Converting offset of datetime in Python 3.6

fixed the issue. Will look into that further Changed in version 3.7: When the %z directive is provided to the strptime() method, the UTC offsets can have a colon as a separator between hours, minutes and seconds. For example, '+01:00:00' will be pars

TAG : python

Date : December 01 2020, 04:52 PM , By : user3045157

Create an alias for a file in Terminal

Any of those help At the heart of macOS is a UNIX-like operating system known as Darwin, which is based on several different UNIX variants (BSD, NeXTSTEP, Mach). The Terminal application presents the user with a shell known as the bash shell (this is

TAG : python

Date : December 01 2020, 04:52 PM , By : user3045156

How to get all the values of a variable inside a for loop when that variable is called outside the loop? (without using

Any of those help Don't know about the loading bit but this will return you the correct number of links as a list you can later loop.

TAG : python

Date : December 01 2020, 04:52 PM , By : nextvern

How i can register on Django admin a field for upload of files

With these it helps The upload method on InvoiceForm isn't being called. You'll need to call it from a method on the form which gets called by Django admin, for example when the form is saved. Have a look here for how forms work in Django. https://do

TAG : python

Date : December 01 2020, 04:52 PM , By : Heoma

python/pandas - get results from searching two columns

should help you out When you try to and the results of your dataframe/series operations, it tries to see if df1 and df2. Which means that it tries to see whether the resulting dataframes are True. There is no concept of a dataframe being True in pand

TAG : python

Date : December 01 2020, 04:52 PM , By : user3045114

pass the values of a tensor to the lower traingular part of 2 dimentional tensor

wish of those help I am new in Python and Tensorflow and I am working on a project in Python. Assume I have vector X, , You need to get all indices for X and apply them to A.

TAG : python

Date : December 01 2020, 04:52 PM , By : user3045107

Program crashes after input

like below fixes the issue Running the script doesn't show any errors, can you provide more information on when the program is crashing? As asked by other users, how are you running the module?I removed the items in the lists that are lowercase so th

TAG : python

Date : December 01 2020, 04:52 PM , By : arunangaj

How to return a Pandas.Series in a user defined function, aka udf?

around this issue Looks like you didn't have return statement in pandas_udf. So by default, python returns None for you. Try something like this:

TAG : python

Date : December 01 2020, 04:52 PM , By : user3045061

What is the difference between a numpy array of size (100, 1) and (100,)?

hop of those help? First question's answer: a is a vector, and b is a matrix. Look at this stackoverflow link for more details: Difference between numpy.array shape (R, 1) and (R,)Second question's answer:

TAG : python

Date : December 01 2020, 04:52 PM , By : user3045060

How can I make, from 1 list of string, a DataFrame with index each unique couple made from this list?

hope this fix your issue everyone (for editing my question with good layout and for itertools answers)I was first thinking of something with pandas pivot but not efficient.

TAG : python

Date : December 01 2020, 04:52 PM , By : Valora

python: state of imported global variables holding a reference to lambda function

I think the issue was by ths following , Random stab in the dark ahead:If you look at the docs for __import__, there's the bit:

TAG : python

Date : December 01 2020, 04:52 PM , By : Khemp

How to do xpath "and" / condition query correctly?

hope this fix your issue I think you are trying to click without passing the WebElement. You can find the checkbox based on the position of Prime label next to it.Try the following xpath,

TAG : python

Date : December 01 2020, 04:52 PM , By : user3045030

How to mock a zip file

I wish this helpful for you You have to patch is_zipfile() separately from ZipFile, because is_zipfile() is a function, not a method of the ZipFile class. I suppose you might be able to patch the whole zipfile module by patching mypackage.utils.zipfi

TAG : python

Date : December 01 2020, 04:50 PM , By : funsal

How to represent a dot using pycairo

seems to work fine How stupid of me, It's a filled circle of a radius approaching zero, martineau for helping.

TAG : python

Date : December 01 2020, 04:50 PM , By : user3044999