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Showing posts from November, 2024

Removing Rows In Pandas Based On Multiple Columns

In Pandas, I have a dataframe with ZipCode, Age, and a bunch of columns that should all have values… Read more Removing Rows In Pandas Based On Multiple Columns

How To Implement An Import Hook That Can Modify The Source Code On The Fly Using Importlib?

Using the deprecated module imp, I can write a custom import hook that modifies the source code of … Read more How To Implement An Import Hook That Can Modify The Source Code On The Fly Using Importlib?

How To Calculate Probability Of A Binary Function In Python?

Let us consider the following function: $f(x)=\begin{cases} 0,& \Pr(f(x)=0)=x \\ 1,& … Read more How To Calculate Probability Of A Binary Function In Python?

Django: Different Behaviour In Createview And Updateview With Unique Constraint

class Badge(Model): # .... class Meta: unique_together = ('identifier', &#… Read more Django: Different Behaviour In Createview And Updateview With Unique Constraint

How To Use Arrayfield In Django Using Postgresql Db?

I want to do this import in my django models.py: from django.contrib.postgres.fields import ArrayFi… Read more How To Use Arrayfield In Django Using Postgresql Db?

Python Serialize Lexical Closures?

Is there a way to serialize a lexical closure in Python using the standard library? pickle and mar… Read more Python Serialize Lexical Closures?

Syntax Error In Ternary If-else Statement

We can use if-else like this: statement if condition else statement but there are some problems he… Read more Syntax Error In Ternary If-else Statement

Sqlalchemy Adds Significant Overload. Sqlalchemy Object Has No Attribute 'datetime

I have issues with my code, trying to setup SQLAlchemy database in flask using python. Code: Thanks… Read more Sqlalchemy Adds Significant Overload. Sqlalchemy Object Has No Attribute 'datetime

How To Encode A Unicode String (ones From Json) To 'utf-8' In Python?

I am creating a REST API using Flask-Python. One of the urls (/uploads) takes in (a POST HTTP reque… Read more How To Encode A Unicode String (ones From Json) To 'utf-8' In Python?

Running Computation In Background Thread Python/pygtk

Is there a way to run a python thread in the background without locking down the rest of python dur… Read more Running Computation In Background Thread Python/pygtk

Trying To Write Filename To Csv

My code determines if the contents of the file returns True or False and output the results to a .c… Read more Trying To Write Filename To Csv

Outputting A Python Dictionary With Values In An Array To A Csv File.

First question here, please forgive the various and sundry errors I'm sure to make. I've be… Read more Outputting A Python Dictionary With Values In An Array To A Csv File.

Download The Second Half Of A Video Using Http's Range Header

I want to download the second half of a video I have on my local host, I wrote some python code to … Read more Download The Second Half Of A Video Using Http's Range Header

More Efficient Ways To Find The Number Of Matching Values Shared By Two Iterables?

EDIT: Looking for the number of matches not the matches themselves. Cannot solve with sets or [x fo… Read more More Efficient Ways To Find The Number Of Matching Values Shared By Two Iterables?

Combining Csv Files Column-wise

Suppose I have two CSV files called A and B in Python. A's head looks like: headerNameA1,heade… Read more Combining Csv Files Column-wise

How To Find Different Centers Of Various Arcs In A Almost Circular Hole Using Opencv?

I have a photo of a hole. I am currently assuming that the hole is not a perfect circle, and hence … Read more How To Find Different Centers Of Various Arcs In A Almost Circular Hole Using Opencv?

Python's Re.split() Not Removing All Matched Characters

This is driving me absolutely nuts. I am positive that the entire date range at the start of the st… Read more Python's Re.split() Not Removing All Matched Characters

Embed Widgets Into Qwindow

Basically I want to create a window using QtGui.QWindow() instead of QtWidgets.QMainWindow(). I wan… Read more Embed Widgets Into Qwindow

How To Exactly Uninstall Anaconda(python 3.6.4) From Windows 7?

I was trying to uninstall Anaconda Navigator (python 3.6.4) from my windows 7. There was no uninsta… Read more How To Exactly Uninstall Anaconda(python 3.6.4) From Windows 7?

Extract Dataframe From A List Of Indices Of Another Dataframe

I've a DataFrame 'A' and a list of indices 'I'. I want to generate/get a DataFr… Read more Extract Dataframe From A List Of Indices Of Another Dataframe

Python 3 : Why Would You Use Urlparse/urlsplit

I'm not exactly sure what these modules are used for. I get that they split the respective url… Read more Python 3 : Why Would You Use Urlparse/urlsplit

Matplotlib Changes Jpg Image Color

I'm reading images from filesystem using matplotlib imread function. However, it changes jpg im… Read more Matplotlib Changes Jpg Image Color

Python - How To To_csv() With An Column Of Arrays

I have data containing some large arrays in a .csv like: df = pd.DataFrame() for x in range(1, 6):… Read more Python - How To To_csv() With An Column Of Arrays

Nameerror: Global Name 'dot_parser' Is Not Defined

I was playing with the decision tree algorithm and trying to plot the tree. However the IDE reporte… Read more Nameerror: Global Name 'dot_parser' Is Not Defined

Set Value Multiindex Pandas

I'm a newbie to both Python and Pandas. I am trying to construct a dataframe, and then later po… Read more Set Value Multiindex Pandas

Soup.findall Is Not Working For Table

I am trying to parse this site https://www.dibbs.bsm.dla.mil/RFQ/RfqRecs.aspx?category=issue&Ty… Read more Soup.findall Is Not Working For Table

Fourier Series From Discrete Fourier Transform

I'm trying to recreate a function from a discrete fourier transform. In Matlab it would be done… Read more Fourier Series From Discrete Fourier Transform

Python Library Or Code To Read Already Open Excel File

Suppose I have an Excel 2013 file already open (say XYZ.xlsx) - this file gets some data via a DDE … Read more Python Library Or Code To Read Already Open Excel File

Negative Binomial Mixture In Pymc

I am trying to fit a Negative binomial mixture with PyMC. It seems I do something wrong, because th… Read more Negative Binomial Mixture In Pymc

First Time Attempting To Thread Using Concurrent.futures-why Do I Get No Output?

I'm very new to python, so there could be multiple things wrong with my code. But I can't d… Read more First Time Attempting To Thread Using Concurrent.futures-why Do I Get No Output?

Invalid Syntax Using Dict Comprehension

Given a list of floats named 'x', I would like to create a dict mapping each x in x[1:-1] t… Read more Invalid Syntax Using Dict Comprehension

How To Modify Pandas Plotting Integration?

I'm trying to modify the scatter_matrix plot available on Pandas. Simple usage would be Obtaine… Read more How To Modify Pandas Plotting Integration?

Opencv Imshow Fails Randomly

When I want to display an image, the cv2.imshow() fails randomly. import cv2 frame = cv2.imread(&#… Read more Opencv Imshow Fails Randomly

Check If All Sides Of A Multidimensional Numpy Array Are Arrays Of Zeros

An n-dimensional array has 2n sides (a 1-dimensional array has 2 endpoints; a 2-dimensional array h… Read more Check If All Sides Of A Multidimensional Numpy Array Are Arrays Of Zeros

Splitting Data To Training, Testing And Valuation When Making Keras Model

I'm a little confused about splitting the dataset when I'm making and evaluating Keras mach… Read more Splitting Data To Training, Testing And Valuation When Making Keras Model

How To Find A Given Element In Nested Lists?

This is my iterative solution: def exists(key, arg): if not arg: return False else:… Read more How To Find A Given Element In Nested Lists?

Kill Main Thead From Child Thread Python

I want to kill the main process when the function check_Temp exits/raises an exception. I know this… Read more Kill Main Thead From Child Thread Python

Theano Gives "...waiting For Existing Lock By Unknown Process..."

My code was working fine. However, now I am getting an error that says: Using gpu device 0: GeForce… Read more Theano Gives "...waiting For Existing Lock By Unknown Process..."

Why Am I Getting This Valueerror?

So here is my code for a full understanding: https://hastebin.com/qigimomika.py . So basically I ha… Read more Why Am I Getting This Valueerror?