Lets say I have a list: There are two tuples with ‘a’ as the first element, and two tuples with ‘c’ as the first element. I want to only keep the first instance of each, so I end up with: How can I achieve that? Answer You can use a dictionary to help you filter the duplicate keys:
Why does my date column change when I convert to an ndarray
below is my dataframe when I convert my ‘Year” column to list(), they are saved as time stamp However, when I convert to values they are saved as datetime64 How do I get my array in Timestamp itself (instead of datetime64 format)? Answer It’s converted to a datetime64 because numpy arrays on…
create custom marked degree for plotly windrose python
Is there a way to add additional degrees in windrose(default degrees marked as every 45° )? what I want to do is, mark degrees at every 22.5° instead of every 45°(0°,22.5°,45°,67.5° and so on). I read the plotly windrose documentation, but couldn’t able to find a suitable way to fix this. code: Answer h…
Why is it saying my variable is not subscriptable?
I sometimes get this error (TypeError: ‘NoneType’ object is not subscriptable) when I call getLink()[0], and I sometimes don’t. Does anyone know why I’m getting this error? getLink() should be subscriptable… EDIT: my issue was I needed a longer time.sleep() waiting function to gi…
How to fix this import matplotlib problem in M1 Mac?
I bought Mac M1, and now setting up my python environment. I installed Rosetta 2, and set my Terminal as Rosetta 2 I installed pyenv with brew installed Sqlite3 with brew installed python 3.9.4 with pyenv (set as global) installed visual studio code with brew installed pandas with pip in Terminal(arm64) (prob…
Pythonw stuck on python2.7 on MacOS X 10.15.7 in conda environment
How can I force pythonw to use python3 instead of python2? Here are the outputs from my zsh terminal (MacOS X 10.15.7): However when it comes to pythonw, I get such an output: How can I make the pythonw to execute using python3? Additional info – I am trying to install DeepLabCut software package with t…
How to escape unicode special chars in string and write it to UTF encoded file
What I aim to achieve is to: string like: convert to: and write it in this form to file (which is UTF-8 encoded). Answer Another solution, not relying on the built-in repr() but rather implementing it from scratch: Differences: Encodes only using u, never any other sequence, whereas repr() uses about a third …
Python Pandas style highlight specific cells for each column with different condition
I’m trying to highlight specific cells for each column with different condition which their value matches the condition for each row. Below image is what I want to achieve: The table I attempt to achieve I searched google and stackoverflow but none of these can meet my requirement. Can anyone who’…
geopandas known intersection returns False
I have two sets of multipolygons. I want to select one polygon from one dataset (by using the matplotlib click event which works) and then select all polygons from the second dataset that intersect with it. When I plot the datasets they clearly overlap (see below) but my intersection always returns False. The…
Count value pairings from different columns in a DataFrame with Pandas
I have a df like this one: df: I want to transform this into a df that looks like this So for every item i want a row with the possible combinations of cup and size and an additional row with the frequency. What is the proper way to do this using pandas? Answer Let’s try: Add a frequency column