I am practicing my python coding on this website. This is the problem This is my code , for some unknown reason , i dont pass all the testcases. I have problems debugging it Answer You don’t need to creat a function,just a line is enough.like: return s.count(‘cat’) == s.count(‘dog̵…
Tag: python
Updating a python dictionary while adding to existing keys?
I’m looking for the most efficient and pythonic (mainly efficient) way to update a dictionary but keep the old values if an existing key is present. For example… notice how the key ‘2’ exists in both dictionaries and used to have values (‘3’, ‘1’) but now it has…
matplotlib 2d line line,=plot comma meaning
I’m walking through basic tutorials for matplotlib, and the example code that I’m working on is: Does anyone know what the comma after line (line,=plt.plot(x,y,’-‘)) means? I thought it was a typo but obviously the whole code doesn’t work if I omit the comma. Answer plt.plot retu…
Use Python to Access Battery Status in Ubuntu
I am trying to come out with a small python script to monitor the battery state of my ubuntu laptop and sound alerts if it’s not charging as well as do other stuff (such as suspend etc). I really don’t know where to start, and would like to know if there is any library for python i can use. Any
Is there any python bindings for android developers?
I am a python learner; would like to develop few applications in Android platform. Is there any Python bindings available for developing Android apps ? Also I would like to know, Using python binding for development will make any performance overhead compared to java ? Answer You’ll probably want to hav…
Convert pandas timezone-aware DateTimeIndex to naive timestamp, but in certain timezone
You can use the function tz_localize to make a Timestamp or DateTimeIndex timezone aware, but how can you do the opposite: how can you convert a timezone aware Timestamp to a naive one, while preserving its timezone? An example: I could remove the timezone by setting it to None, but then the result is convert…
Draw faster circles with Python turtle
I have an exercise wherein I have to draw a lot of circles with Python turtle. I have set speed(0) and I am using: to draw circles. It takes so long. Is there any faster way? Answer You could draw fewer segments, so rather than 360 you go for 120: That will make your circle less smooth, but three times
Using arctan / arctan2 to plot a from 0 to 2π
I am trying to replicate a plot in Orbital Mechanics by Curtis, but I just can’t quite get it. However, I have made head way by switching to np.arctan2 from np.arctan. Maybe I am implementing arctan2 incorrectly? In the image below, there are discontinuities popping up. The function is supposed to be sm…
How to use memory_profiler (python module) with class methods?
I want to profile time and memory usage of class method. I didn’t find an out of box solution for this (are there such modules?), and I decided to use timeit for time profiling and memory_usage from memory_profiler module. I faced a problem of profiling methods with memory_profiler. I’ve tried dif…
matplotlib: Group boxplots
Is there a way to group boxplots in matplotlib? Assume we have three groups “A”, “B”, and “C” and for each we want to create a boxplot for both “apples” and “oranges”. If a grouping is not possible directly, we can create all six combinations and pla…