Here is a snippet that includes my string. The string was returned from an SSH command that I executed. I can’t use the string in its current state because it contains ANSI standardized escape sequences. How can I programmatically remove the escape sequences so that the only part of the string remaining…
Tag: python
Create a 2D list out of 1D list
I am a bit new to Python and I want to convert a 1D list to a 2D list, given the width and length of this matrix. Say I have a list=[0,1,2,3] and I want to make a 2 by 2 matrix of this list. How can I get matrix [[0,1],[2,3]] width=2, length=2 out of the list? Answer Try something
python pandas extract unique dates from time series
I have a DataFrame which contains a lot of intraday data, the DataFrame has several days of data, dates are not continuous. How can I extract the unique date in the datetime format from the above DataFrame? To have result like [2012-10-08, 2012-10-10] Answer If you have a Series like: where each object is a T…
How to drop a list of rows from Pandas dataframe?
I have a dataframe df : Then I want to drop rows with certain sequence numbers which indicated in a list, suppose here is [1,2,4], then left: How or what function can do that ? Answer Use DataFrame.drop and pass it a Series of index labels:
OpenCV v1/v2 error: the function is not implemented
I’m trying to get OpenCV working with Python on my Ubuntu machine. I’ve downloaded and installed OpenCV, but when I attempt to run the following python code (which should capture images from a webcam and push them to the screen) I get the following error: So I do what they ask: install the package…
Merge of lazy streams (using generators) in Python
I’m playing with functional capacities of Python 3 and I tried to implement classical algorithm for calculating Hamming numbers. That’s the numbers which have as prime factors only 2, 3 or 5. First Hamming numbers are 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 18, 20 and so on. My implementation is the fol…
Breakpoint-induced interactive debugging of Python with IPython
Say I have an IPython session, from which I call some script: Is there a way to induce a breakpoint in my_script.py from which I can inspect my workspace from IPython? I remember reading that in previous versions of IPython one could do: but the submodule Debugger does not seem to be available anymore. Assumi…
Python inserting variable string as file name
I’m trying to create a file with a unique file name for every time my script runs. I am only intending to do this to every week or month. so I chose to use the date for the file name. is where I’m getting this error. it works if I use a static filename, is there an issue with the
How to check if a specific integer is in a list
I want to know how to make an if statement that executes a clause if a certain integer is in a list. All the other answers I’ve seen ask for a specific condition like prime numbers, duplicates, etc. and I could not glean the solution to my problem from the others. Answer You could simply use the in keyw…
Extracting XML Attributes
I have an XML file with several thousand records in it in the form of: How can I convert this into a CSV or tab-delimited file? I know I can hard-code it in Python using re.compile() statements, but there has to be something easier, and more portable among diff XML file layouts. I’ve found a couple thre…