I have a dataframe: I need a sum of adjusted_lots , price which is weighted average , of price and adjusted_lots , grouped by all the other columns , ie. grouped by (contract, month , year and buys) Similar solution on R was achieved by following code, using dplyr, however unable to do the same in pandas. is …
Tag: python
How to create a boxplot not showing the outliers using Python and Plotly?
How to create a boxplot not showing the outliers using Python and Plotly? I have a full list of points I use to create a box plot that has many outliers and the range is too big for a comparable box plot. I just don’t want to show the outliers in this list on the box plot at all. Is
One line repeating counter with itertools?
I want to write an infinte generator using itertools that combines a the count and repeat iterators, by repeating each number n times before incrementing. Is there a more concise way to do it than what I came up with? Answer Use integer division!
Return copy of dictionary excluding specified keys
I want to make a function that returns a copy of a dictionary excluding keys specified in a list. Considering this dictionary: A call to without_keys(my_dict, [‘keyB’, ‘keyC’]) should return: I would like to do this in a one-line with a neat dictionary comprehension but I’m havin…
Control wsgiref simple_server log
I’m playing with wsgiref.simple_server to study the world of web servers. I would like to control the log generated, but could not find anything about it in Python’s documentation. My code looks like this: Answer wsgiref.simple_server.make_server by default creates a WSGIServer with WSGIRequestHan…
Why does “not(True) in [False, True]” return False?
If I do this: That returns True. Simply because False is in the list. But if I do: That returns False. Whereas not(True) is equal to False: Why? Answer Operator precedence 2.x, 3.x. The precedence of not is lower than that of in. So it is equivalent to: This is what you want: As @Ben points out: It’s re…
Django: Deploying an application on Heroku with sqlite3 as the database
I want to deploy an application with sqlite3 as the database on Heroku. However, it seems to be that Heroku doesn’t support applications with sqlite3 as the database. Is it true? Is there no way to deploy my sqlite3-backed application on Heroku? PS: I have successfully deployed my application using Pyth…
Format y axis as percent
I have an existing plot that was created with pandas like this: The y axis is format as float and I want to change the y axis to percentages. All of the solutions I found use ax.xyz syntax and I can only place code below the line above that creates the plot (I cannot add ax=ax to the line above.)
Error : “You are trying to add a non-nullable field”
I defined below model and getting error : You are trying to add a non-nullable field ‘user’ to videodata without a default; we can’t do that models.py Where i am doing wrong???? Answer As the error says, your user field on VideoData is not allowing nulls, so you either need to give it a defa…
Selenium: How to Inject/execute a Javascript in to a Page before loading/executing any other scripts of the page?
I’m using selenium python webdriver in order to browse some pages. I want to inject a javascript code in to a pages before any other Javascript codes get loaded and executed. On the other hand, I need my JS code to be executed as the first JS code of that page. Is there a way to do that by Selenium?