I have data in the format (latitude, longitude, value). I want to plot (lat, long) -> value on a map of the city. Something like the following images: I’ve already tried the following: Python’s Matplotlib: Unable to find required functions Plotly r-barplots on map, RG-histogram-bar-chart-over-m…
Iterate over n successive elements of list (with overlapping)
The itertools python module implements some basic building blocks for iterators. As they say, “they form an iterator algebra”. I was expecting, but I could not find a succinctly way of doing the following iteration using the module. Given a list of ordered real numbers, for example … return …
ImportError: No module named ‘encodings’
I recently reinstalled ubuntu and did upgrade to 16.04 and cannot use python: At this point, python itself doesn’t work Even this suggestion is no longer working: Every every I fix it one way, it comes back again. Several answers help to fix it temporarily, but not for good. I have reinstalled python an…
How to use groupby to concatenate strings in python pandas? [duplicate]
This question already has answers here: Concatenate strings from several rows using Pandas groupby (8 answers) Closed 6 months ago. I currently have dataframe at the top. Is there a way to use a groupby function to get another dataframe to group the data and concatenate the words into the format like further …
python divide by zero encountered in log – logistic regression
I’m trying to implement a multiclass logistic regression classifier that distinguishes between k different classes. This is my code. I can verify that cost and gradient are returning values that are in the right dimension (cost returns a scalar, and gradient returns a 1 by n row vector), but i get the e…
catch exception and return empty dataframe
I query a database and save result as a dataframe which I then transform by factorize with pivot_table. This works fine when database query returns data but it throws an error when no data is returned(this is to be expected). How to catch this exception and return empty dataframe? DataError: No numeric types …
Semantic equivalent of async for
From the docs relative to async for syntax in Python 3.5, I gathered that it was introduced to iterate over an awaitable iterator. There is something I don’t get in the semantic equivalent that follow the description though: What is the line iter = type(iter).__aiter__(iter) doing? Why is it necessary? …
Internationalization (i18n) not rendered using flask-babel and apache with mod_wsgi on Ubuntu instance
I have a web application developed using python 2.7.6, flask and deployed on a Apache Ubuntu server. For internationalization, the app uses the flask-babel package in order to translate into Thai. However, it seems that my translations/th/LC_messages/messages.po file is ignored. It works perfectly in my local…
Treat regular expression between dashes
Could you help me to use “sub” to change the numbers of these expressions: &AFL-03-123456 &AFL-01-12345 &AFL-02-123 context: samsung-j7-duos-dual-chip-desbloqueado-oi-android-5.1-tela-5.5-16gb-wi-fi-4g-camera-13mp-branco&AFL-03-171644black In need to replace the numbers after the s…
Normalizing images in OpenCV produces black image?
I wrote the following code to normalize an image using NORM_L1 in OpenCV. But the output image was just black. How to solve this? Answer If you want to change the range to [0, 1], make sure the output data type is float.