I have a dataframe which looks like this I would like to have “0” values at the end when sorting so my resulting dataframe looks like this. Is there a simple (1 line of code) solution? Answer First mask the zeros then use argsort on column A to get the indices that would sort the dataframe:
Tag: python
Pandas: str.contains first word followed by colon
I am trying to understand how to identify columns which start with a word, which is immediately followed by a colon. I tried identifying that it should match less then 9 characters, followed by a colon – but with no lack. The example is below: Michael: this should be picked up pandas This should not be picked up by pandas
What does triangle/circle sign mean in PyCharm?
PyCharm window Before it was a circle now it is a triangle. What does it stand for? Answer At the bottom of your PyCharm screen there’s a toolbar with info that corresponds to what you see in the Project window. This should help you explain what these icons mean. For example: If the branch is up-to-date and there are no
Getting all starting dates of year 2020 with ISO week frequency
I’d like to create a list of dates each of which represents the starting date of ISO week N of year 2020. Something like: I have obtained something similar using timedelta(weeks=1), and adding this to my START_DATE (date(2020, 1, 1)), but the dates I obtain are not correct. I know I could simply change my START_DATE to be date(2019, 12,
Iteration numbers with True False condition
Please HELP!! I have a list: I want to generate iteration number if it’s False the number continues and if it’s True the number stays. I Try this code: it’s just keep running and did not show any output. the desired output will be [1,2,3,3,3,4,5,6,6] I have no idea what’s wrong with it Thanks Answer Yet another version of this
How to convert list of dictionaries into a dictionary of dictionaries by using inner key:value pair
So, instead of trying to explain things first, I will just show you what I have and what I want (this is easier): What I have: What I want to get from what I have: Explanation: So, I want to create a dictionary by using the “label” keys as the main keys in that new dictionary. I also need to
Is it posible to find index-row and values with QRegExp with search name?
I want to find the row-index with searching word using with QSortFilterProxyModel and QtCore.QRegExp. I want to create a list with “mobile” and “email” columns only from the row which is finding from the variable of QRegExp. Below is example code: I want to print the row.index and insert the value of “mobile” and “email” of the row into list_a.
Numpy find maximum tuple in array of windows
I’m starting our with list of tuples (each tuple is an (X,Y)). My end result is I want to find the maximum Y-value within EACH window/bin of length 4 using numpy. Expected output I want from each window/blocks using max y-value is below. Alternatively format could be regular list of tuples, doesn’t strictly need to be numpy array: Answer Here
How to retrieve partial matches from a list of strings
For approaches to retrieving partial matches in a numeric list, go to: How to return a subset of a list that matches a condition? Python: Find in list But if you’re looking for how to retrieve partial matches for a list of strings, you’ll find the best approaches concisely explained in the answer below. SO: Python list lookup with partial
Undefined reference to `main` error when embedding Python in C++
I’m trying to embed Python in C++. This is my Python file (with the name EmbedTest.py): This is my C++ file (with the name EmbedTest.cpp and located in the same folder as EmbedTest.py) Compiling is fine. I use the flags suggested by python3.6-config –cflags. Hence gcc -c -I/home/MyFolder/anaconda3/include/python3.6m -Wno-unused-result -Wsign-compare -march=nocona -mtune=haswell -ftree-vectorize -fPIC -fstack-protector-strong -O3 -pipe -fdebug-prefix-map==/usr/local/src/conda/- -fdebug-prefix-map==/usr/local/src/conda-prefix -fuse-linker-plugin