A Tkinter Button has three states : active, normal, disabled. You set the state option to disabled to gray out the button and make it unresponsive. It has the value active when the mouse is over it and the default is normal. Using this you can check for the state of the button and take … Read more
I’m trying to do a simple primality test in Python. Accoding to Wikipedia, a primality test is the following: Given an input number n, check whether any integer m from 2 to n − 1 divides n. If n is divisible by any m then n is composite, otherwise it is prime. I started with … Read more
TypeError: can’t multiply sequence by non-int of type ‘list’ Not sure what’s causing the error? When I print each of the statements separately, they each give me a list, but when I try to multiply them it doesn’t work.
pd.concat requires that the indices be unique. To remove rows with duplicate indices, use Note there is also pd.join, which can join DataFrames based on their indices, and handle non-unique indices based on the how parameter. Rows with duplicate index are not removed.
I am using the latest version of Anaconda3. I just installed it and I am trying to download some packages. I am using the Anaconda Prompt. While trying to use pip to do anything (including upgrading existing packages) I get the following traceback. Any ideas? (this problem only started after I installed tensorflow) Thanks.
The csv file might contain very huge fields, therefore increase the field_size_limit: sys.maxsize works for Python 2.x and 3.x. sys.maxint would only work with Python 2.x (SO: what-is-sys-maxint-in-python-3) Update As Geoff pointed out, the code above might result in the following error: OverflowError: Python int too large to convert to C long. To circumvent this, … Read more
For large arrays, a vectorised numpy operation is the fastest. If you must loop, prefer xrange/range and avoid using np.arange. In numpy you should use combinations of vectorized calculations, ufuncs and indexing to solve your problems as it runs at C speed. Looping over numpy arrays is inefficient compared to this. (Something like the worst … Read more
TL;DR Use the Wrapper helper from python-varname: For list comprehension part, you can do: I am the author of the python-varname package. Please let me know if you have any questions or you can submit issues on Github. The long answer Is it even possible? Yes and No. We are retrieving the variable names at … Read more
You can plot several columns at once by supplying a list of column names to the plot‘s y argument. This will produce a graph where bars are sitting next to each other. In order to have them overlapping, you would need to call plot several times, and supplying the axes to plot to as an … Read more
I would like to know how to convert a string containing digits to a double.