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PYTHON QUESTIONS

Why is grouping by dates in a Pandas dataframe so slow?
Why is grouping by dates in a Pandas dataframe so slow?
help you fix your problem you are creating a whole new list of values to group by, and passing through a python function to do it, instead of letting pandas just group on your values.this means you're copying a whole lot of data around, and also each
TAG : python
Date : November 28 2020, 12:01 PM , By : user3042393
How to connect to a database using a function and sqlalchemy
How to connect to a database using a function and sqlalchemy
help you fix your problem Your question is missing some parts, that's why I can't figure out exactly what is the problem. But below I wrote a simple sample that should help you :
TAG : python
Date : November 28 2020, 12:01 PM , By : user3042389
How do I access a file for reading/writing in a different (non-current) directory?
How do I access a file for reading/writing in a different (non-current) directory?
seems to work fine A solution I found is putting "../" before the filename if the path is right outside of the dictionary.test.py (in some dictionary right inside dictionary "Desktop" (i.e. /Desktop/test):
TAG : python
Date : November 27 2020, 05:23 PM , By : user3042384
how to properly remove qwidgets and update/reload that widget
how to properly remove qwidgets and update/reload that widget
will help you Is this what you were expecting?Also, is there a specific reason why you are using global variables in your class? It is bad practice, you should make them class members.
TAG : python
Date : November 27 2020, 05:23 PM , By : user3042376
Group list of dict results using python based on first key from each item
Group list of dict results using python based on first key from each item
seems to work fine you can use defaultdict(list), then iterate each k,v pair in each dict in input.try this:
TAG : python
Date : November 27 2020, 05:23 PM , By : user3042374
How to reshape a multidimensional array from a particular arrangement to another arrangement?
How to reshape a multidimensional array from a particular arrangement to another arrangement?
help you fix your problem Since you only need to swap the position of two axes, you can use np.swapaxes. This is probably the most straightforward approach to get your desired output.
TAG : python
Date : November 27 2020, 05:23 PM , By : user3042369
Weird interpolation of a numpy 2D array
Weird interpolation of a numpy 2D array
To fix the issue you can do Why don't you use skimage's resize?
TAG : python
Date : November 27 2020, 05:23 PM , By : user3042368
How to read multiple numpy arrays from a folder
How to read multiple numpy arrays from a folder
will help you You can always loop over all files that have the extension you are looking for and store them in a data structure that makes sense for your use caseFor example to store them all in a dictionary where the keys are the filenames:
TAG : python
Date : November 27 2020, 05:23 PM , By : user3042361
performing mathematical operations for each row of a 2d array against another 2d array
performing mathematical operations for each row of a 2d array against another 2d array
hop of those help? you can use numpy.linalg.norm. here is an example:
TAG : python
Date : November 27 2020, 05:23 PM , By : user3042360
Is there a way to extract information from shadow-root on a Website?
Is there a way to extract information from shadow-root on a Website?
hop of those help? If you use their website, it'll only return a loading screen for VirusTotal, as this isn't the proper way. What Shows Up:
TAG : python
Date : November 27 2020, 05:23 PM , By : user3042347
Resize widget after contents are added to it
Resize widget after contents are added to it
This might help you There are 2 ways I can overcome the problem but they're not ideal. Recall self.combo.setIconSize(QtCore.QSize(40,40)) after the new items are added. This results in the widget expanding without "pushing" other widgets in the same
TAG : python
Date : November 27 2020, 05:23 PM , By : user3042340
Why my conda environment inherits all base packages?
Why my conda environment inherits all base packages?
hope this fix your issue It sounds silly, but make sure that you are actually activating the new environment. Also make sure to check that which python and which pip refer to the new environment, I've had problems before where tmux makes conda activa
TAG : python
Date : November 27 2020, 05:23 PM , By : user3042298
Skip the next QWizardPage depending on QCheckBox.isChecked() from the page before
Skip the next QWizardPage depending on QCheckBox.isChecked() from the page before
seems to work fine You need to implement the nextId() of the wizard page or the wizard itself (which by default calls currentPage().nextId()).In the first case, you'll need to keep or get a reference to the two pages, but that can also be done by ove
TAG : python
Date : November 27 2020, 05:23 PM , By : Sarkis
Tkinter Grid Method Query. No Need to Put in Return From a Function
Tkinter Grid Method Query. No Need to Put in Return From a Function
I wish this help you Not all functions must return something. In the end, a function is merely a container for a code to be repeated in a clean way. That is, instead of copying it everywhere.Of course, a lot of functions return values to be used by c
TAG : python
Date : November 27 2020, 05:23 PM , By : user3042258
Offline python package installation needs to connect?
Offline python package installation needs to connect?
wish of those help Although I have downloaded a .whl package offline, I have not been able to install it offline since it needs to connect to pypi server. What can I do? , Try specifying a relative or absolute path.Linux:
TAG : python
Date : November 27 2020, 05:23 PM , By : Avigail
Converting integers to Bytes in python
Converting integers to Bytes in python
it fixes the issue It looks like you're working on building out a IPv4 packet header (you should've mentioned this in your question, assuming you know this to be the case).Your logic currently takes the version and appends it to your byte array as a
TAG : python
Date : November 27 2020, 05:23 PM , By : user3042240
Fixing comment functionality for users to a post -- flask app
Fixing comment functionality for users to a post -- flask app
With these it helps One way you can achieve getting all the information is by changing slightly your query to use explicit queries:
TAG : python
Date : November 27 2020, 05:23 PM , By : rino
Django, JSON serialize queryset and list of models has different behavior
Django, JSON serialize queryset and list of models has different behavior
this one helps. I have a Django model with a function (on the Python class) that modifies some of its fields. , django.forms.models.model_to_dict did the trick
TAG : python
Date : November 27 2020, 05:23 PM , By : KopiJunkie
Keras : Monitoring val_loss for early stopping- Issue with misreporting
Keras : Monitoring val_loss for early stopping- Issue with misreporting
This might help you you are using min mode which means lr will be reduced when the quantity monitored has stopped decreasing.
TAG : python
Date : November 27 2020, 05:23 PM , By : user3042219
Python how to control curvature when joining two points
Python how to control curvature when joining two points
it helps some times Instead of just guessing the right parameters of your model function, you can fit a model curve to your data using curve_fit.
TAG : python
Date : November 27 2020, 05:23 PM , By : ivan
Retriving data from IMF api as JSON is a nested list of dictionaries in Pandas DataFrame need the time_period and obs_va
Retriving data from IMF api as JSON is a nested list of dictionaries in Pandas DataFrame need the time_period and obs_va
like below fixes the issue Here's a simple way to extract the data. Note that with Pandas, you can assign a column to a single value and it will auto-replicate across all rows. I added '@INDICATOR' just for illustrative purposes - this lets you speci
TAG : python
Date : November 27 2020, 05:23 PM , By : user3042169
Dictionary values to array according to np.where or similar
Dictionary values to array according to np.where or similar
I hope this helps . I have a dictionary of integer keys and values:
TAG : python
Date : November 27 2020, 05:23 PM , By : Fernando J. Santos
How can I plot x/y datapoints from three different time periods on the same axes for analysis?
How can I plot x/y datapoints from three different time periods on the same axes for analysis?
To fix the issue you can do To plot multiple conditions just don't call plt.show() until you've plotted them all.example:
TAG : python
Date : November 27 2020, 05:23 PM , By : user3042155
Calling the execute method from the database class
Calling the execute method from the database class
Any of those help You are calling the execute method on the class (MD), the first argument in that call is being passed to the self parameter. Since the first argument is a string it causes the Exception. Make an instance of the class first:
TAG : python
Date : November 27 2020, 05:23 PM , By : danielbradley880
How to extract text before and after a keyword and date
How to extract text before and after a keyword and date
I wish this helpful for you You can try DataFrame.str.extract for this in combination with a regex:
TAG : python
Date : November 27 2020, 05:23 PM , By : user3042143
Magnitude change to function resulting in different answer
Magnitude change to function resulting in different answer
this will help As others have already pointed out in the comments, the issue is float approximation, as you can see from the code below:
TAG : python
Date : November 27 2020, 05:23 PM , By : user3042134
Starting VLC stops the rest of a python script
Starting VLC stops the rest of a python script
will help you The list that you pass to the subprocess functions is interpreted as argv for the program. Since shell=False by default, no interpretation is done on the arguments. Specifically, is passed as the last argument to vlc, and does not star
TAG : python
Date : November 27 2020, 05:23 PM , By : Guy Alon
How do I import all global variables into a function - Python
How do I import all global variables into a function - Python
hope this fix your issue As I stated in the comment, another way of accessing variables is to implement them in a separate py file and import them in the file you want to access them in as follows;Main.py
TAG : python
Date : November 27 2020, 05:23 PM , By : user3042125
How do I remove all the duplicates in each column respectively?
How do I remove all the duplicates in each column respectively?
help you fix your problem I have multiple columns in a dataframe. , Here is one way using duplicated
TAG : python
Date : November 27 2020, 05:23 PM , By : user3042111
Accessing one of the sheets of a downloaded excel file in python
Accessing one of the sheets of a downloaded excel file in python
it should still fix some issue There may be a more direct way to do this, but I ended up by using xlrd package, which lets me access any sheet, then xlsxwriter to create an excel file from the sheet, and finally pandas to read it as a dataframe.
TAG : python
Date : November 27 2020, 05:23 PM , By : user3042101
Python Flask request.data returning string only
Python Flask request.data returning string only
wish of those help According to the flask docs, one alternative for you is to use get_json
TAG : python
Date : November 27 2020, 05:23 PM , By : user3042090
is there a way in python to hide canvas after few second?
is there a way in python to hide canvas after few second?
will be helpful for those in need You have two problems.First: you create and destroy balls at the same moment so you can't see balls. You have to use after() to run function which will delete ball after few second. You can delete ball in line after
TAG : python
Date : November 27 2020, 05:23 PM , By : user3042080
How to create a list from urls that was concatenated in a loop?
How to create a list from urls that was concatenated in a loop?
With these it helps My goal is put all my urls into a list. I had concatenate them after looping through a number list, as an example: , Because you're calling print on every iteration
TAG : python
Date : November 27 2020, 05:23 PM , By : user3042069
How to parallelize or make faster python script
How to parallelize or make faster python script
may help you . I agree with comments saying that this should not take 30 days to run so the bottleneck should be somewhere else. Probably the biggest offender is the huge string that you are building, instead of just dumping each line to file at ever
TAG : python
Date : November 27 2020, 05:23 PM , By : user3042064
How do I filter a dataframe for the condition where values are returned if two previous values in the data are less than
How do I filter a dataframe for the condition where values are returned if two previous values in the data are less than
it helps some times There might be a cool way to do this in pandas but a good method for more complicated operations on dataframes is to write a small function that can be executed on each line of the dataframe, and then to use df.apply.I'm using the
TAG : python
Date : November 27 2020, 05:23 PM , By : user3042063
DRF - Dynamically adding fields - (first time works, then throwing error)
DRF - Dynamically adding fields - (first time works, then throwing error)
will help you The first thing I notice is that you're calling super().__init__ before you set your display fields, so it's possible that the parent class method is throwing that error because when it is checking for the fields they don't exist yet, h
TAG : python
Date : November 27 2020, 05:23 PM , By : Saad Iqbal
given a column with string data create a dataframe with ascii equivalent of each character in the string
given a column with string data create a dataframe with ascii equivalent of each character in the string
wish help you to fix your issue This uses the pandas compressed datatype, but I only figured out how to apply it to the whole dataframe after it is built. NOTE: I assumed alls strings are strings not mixed integers and strings.
TAG : python
Date : November 27 2020, 05:23 PM , By : Geekou
Sensitivity specificity plot python
Sensitivity specificity plot python
wish help you to fix your issue Building upon @ApproachingDarknessFish's answer, you can fit a variety of distributions to the resulting histograms, not all of which fall outside of [0,1]. For example the beta distribution will do a decent job of cap
TAG : python
Date : November 27 2020, 12:01 PM , By : kumarrsumit
Web scraping using python, how to deal with ngif?
Web scraping using python, how to deal with ngif?
this one helps. I'm trying to read the price of a fund which is not available through an API. The fund is listed here https://bors.e24.no/!/instrument/KL-AFMI2.OSE , I see json being returned from the following endpoint in network tab
TAG : python
Date : November 27 2020, 12:01 PM , By : user3041989
Loop in Thread that blocks the Script
Loop in Thread that blocks the Script
it should still fix some issue Instead of passing a reference to the start_load function on this line:
TAG : python
Date : November 27 2020, 12:01 PM , By : user3041940
How to use boto3.dynamodb.condition import with Anaconda
How to use boto3.dynamodb.condition import with Anaconda
help you fix your problem The issue is just a small typo in your import!As you say in your post, the guide says:
TAG : python
Date : November 27 2020, 12:01 PM , By : user3041936
Passing a not-supervised learning model to cross_val_score
Passing a not-supervised learning model to cross_val_score
I hope this helps . In this case, PCA has a score method (see here): it return "the average log-likelihood of all samples". So your cross_val_score returns this score calculated on each cross validation step.
TAG : python
Date : November 27 2020, 12:01 PM , By : user3041935
Searching a query in Linkedin using the search bar? I'm using Selenium (in python)
Searching a query in Linkedin using the search bar? I'm using Selenium (in python)
To fix the issue you can do Consider using Explicit Waits to ensure that the elements are present/visible/clickable prior to interacting with them. Check out How to use Selenium to test web applications using AJAX technology article for more details
TAG : python
Date : November 27 2020, 12:01 PM , By : user3041929
Yielding a dictionary key, value pair in __iter__ method of a class
Yielding a dictionary key, value pair in __iter__ method of a class
this will help I have a super simple class: , If you have an iterable like item() you can yield from it:
TAG : python
Date : November 27 2020, 12:01 PM , By : Johnny
How can I fix my for loops for a card game?
How can I fix my for loops for a card game?
it helps some times The main issue was definitely the return print statements, and as you realized, there is no real need for the while loops. Since the two blocks after the y/n question are pretty much identical, you could make a function so that it
TAG : python
Date : November 27 2020, 12:01 PM , By : Mark.M
Want to parse a string in list and use
Want to parse a string in list and use
Any of those help I have a list of string. I need to parse it and then use it for further calculations. My , This should work:
TAG : python
Date : November 27 2020, 12:01 PM , By : user3041907
Combining multiple Rows into one Row one Column Python
Combining multiple Rows into one Row one Column Python
help you fix your problem I need to combine all the rows for a dataframe into one row in one column. For example: , Hope this is what you've wanted.
TAG : python
Date : November 27 2020, 12:01 PM , By : user3041898
Pythonic way to pad list1 with non-redundant members from list2?
Pythonic way to pad list1 with non-redundant members from list2?
it should still fix some issue Just use list1 and add elements from list2 if they are not already in list1 until list1 has 5 elements.
TAG : python
Date : November 27 2020, 12:01 PM , By : user3041887
How to graph two plots side by side using matplotlib (no pandas)
How to graph two plots side by side using matplotlib (no pandas)
this one helps. Every time you call subplots(), a new figure is created, which is not what you want. To get the side-by-side plots, do fig, (ax1, ax2) = plt.subplots(nrows=1, ncols=2) and then use ax1 for plotting whatever you want on the left plot,
TAG : python
Date : November 27 2020, 12:01 PM , By : user3041872
How can I use a loop to create new x1 and x2 values every 2.8 units?
How can I use a loop to create new x1 and x2 values every 2.8 units?
wish help you to fix your issue lets say you want to add 2.8 to x1,x2 for 10 times, so you need a do a loop operation which add 2.8 to previous value of x. and update it
TAG : python
Date : November 27 2020, 12:01 PM , By : Billy
Calling function on result of operator expression? (mask == instance_id).astype(np.uint8)
Calling function on result of operator expression? (mask == instance_id).astype(np.uint8)
will help you To get Python to realise that an expression within parentheses is intended as a tuple with one element, you need to put the , after it:
TAG : python
Date : November 27 2020, 12:01 PM , By : user3041847
How to forward to another subpage
How to forward to another subpage
this will help It looks like the authentication process hasn't completed by the time you attempt to navigate to a url that requires the user to be logged in.As discussed in the comments, to test this theory a sleep was added to wait for authenticatio
TAG : python
Date : November 27 2020, 12:01 PM , By : user3041830
Regex: how to remove single characters that are not words?
Regex: how to remove single characters that are not words?
I wish did fix the issue. Simple and elegant solution to your problem IMHO. The \\b signifies the word boundary.Code:
TAG : python
Date : November 27 2020, 12:01 PM , By : user3041828
In a DataFrame, how could we get a list of indexes with 0's in specific columns?
In a DataFrame, how could we get a list of indexes with 0's in specific columns?
will help you You basically want to group on families and retain rows where there is one or more member for all families in the row.One way to do this is to transpose the original dataframe and then split the index on the period, taking the first ele
TAG : python
Date : November 27 2020, 12:01 PM , By : user3041825
What are the Tensorflow qint8, quint8, qint32, qint16, and quint16 datatypes?
What are the Tensorflow qint8, quint8, qint32, qint16, and quint16 datatypes?
Any of those help These are the data types of the output Tensor of the function, tf.quantization.quantize(). This corresponds to the Argument, T of the function.Mentioned below is the underlying code, which converts/quantizes a Tensor from one Data T
TAG : python
Date : November 27 2020, 12:01 PM , By : sprindex
ValueError: need more than 1 value to unpack with matplotlib
ValueError: need more than 1 value to unpack with matplotlib
it fixes the issue The values of interp2d are expected to be 2D array. So, you might wanna look into that. Rest of the code is irrelevant to the question you asked. So, good luck!
TAG : python
Date : November 27 2020, 12:01 PM , By : rajasriram
discord opus problems
discord opus problems
wish help you to fix your issue https://github.com/Rapptz/discord.py/issues/783 you need to install the opus library and the ffmpeg library.
TAG : python
Date : November 27 2020, 12:01 PM , By : user3041792
Tensorflow retrain if it's wrong
Tensorflow retrain if it's wrong
may help you . The key phrase you lack is fine-tuning. This is when you take a model that has finished its customary training (whatever that may be), and needs more work for the application you have in mind. You then give it additional training with
TAG : python
Date : November 27 2020, 12:01 PM , By : user3041787
ConvNN weird accuracy scores and accuracy plot
ConvNN weird accuracy scores and accuracy plot
around this issue I think you are not iterating through full dataset in each epoch. You are just using data of size batch in each iteration which I think is fairly low, like 100, 128, 256, etc. This might be the reason you are getting low accuracy sc
TAG : python
Date : November 27 2020, 12:01 PM , By : mapuna
Creating a loop for creating folders using python
Creating a loop for creating folders using python
With these it helps I have to create folders from 1922 to 2010. For doing this I tried to create a loop as below , You can simply format the result in:
TAG : python
Date : November 27 2020, 12:01 PM , By : user3041763

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