I have file with latitude and longitude values, that i want to convert the x and y in km I want to measure the distance from each point. for instance I make the first points of latitude and longitude(which are 51.58, -124.6 respectfully) to (0,0) in my x and y system so than basically i want to find out what
Tag: python
How to read a file with a semi colon separator in pandas
I a importing a .csv file in python with pandas. Here is the file format from the .csv : here is how get it : Now when I print the file I get that : And so on… So I need help to read the file and split the values in columns, with the semi color character ;. Answer read_csv
List of all programming languages in Select Field
I am trying to create a WtForms SelectField which will show all the various programming languages available to choose from. Its almost impossible to type all the programming languages listed here in the select field. How to implement this kind of select field. Code I have just added three skills for just test…
Is there a Tkinter/ttk style reference?
With ttk one can produce code like the following: Is there a list of the different options (e.g. font, foreground, padding) and the values (e.g. helvetica 24, red, 10) associated with each of them? I’ve been searching online and have yet to find such a reference. Also, is there a css-like thing we can u…
Python Start HTTP Server In Code (Create .py To Start HTTP Server)
Currently I and many others are using a Python HTTP server on several platforms (Windows, OS X and potentially Linux). We are using a Python HTTP server to test a JavaScript game. Right now we are launching the Python HTTP server through the command line on each platform (CMD, Terminal, etc.). Although this w…
How to access Bash environment variable in Python using subprocess?
I can determine the width of the terminal in Python with a subprocess-handled query such as the following: How could I determine the Bash user name in a similar way? So, how could I see the value of ${USER} in Python using subprocess? Answer As Wooble and dano say, don’t use subprocess for this. Use os.…
Python: Length of longest common subsequence of lists
Is there a built-in function in python which returns a length of longest common subsequence of two lists? I tried to find longest common subsequence and then get length of it but I think there must be a better solution. Answer You can easily retool a Longest Common Subsequence (LCS) into a Length of the Longe…
Can Flask support an optional parameter in a POST request?
In the application, the user has a choice to upload a picture or not. But seems to cause the page to stop loading the request if no such file exists. Is there any way to make this optional? Answer You are using syntax that throws an exception if the key is not present. Use .get() instead: This returns None if
How to change django wagtail’s admin logo
I am working on a small project and I thought I’d give wagtail a try. I am now wondering how I could change wagtail’s admin logo in the sidebar (top left image on the picture bellow). I could change /static/wagtailadmin/images/wagtail-logo.svg directly but it’d be wrong ;). Answer Wagtail al…
Split a generator into chunks without pre-walking it
(This question is related to this one and this one, but those are pre-walking the generator, which is exactly what I want to avoid) I would like to split a generator in chunks. The requirements are: do not pad the chunks: if the number of remaining elements is less than the chunk size, the last chunk must be …