Matplotlib chooses Xwindows backend by default. You need to set matplotlib to not use the Xwindows backend. Add this code to the start of your script (before importing pyplot) and try again: Or add to .config/matplotlib/matplotlibrc line backend: Agg to use non-interactive backend. Or when connect to server use ssh -X remoteMachine command to use … Read more
This error usually rises when you join / assign to a column when the index has duplicate values. Since you are assigning to a row, I suspect that there is a duplicate value in affinity_matrix.columns, perhaps not shown in your question.
In numpy, I have two “arrays”, X is (m,n) and y is a vector (n,1) using I am getting the error When (97,2)x(2,1) is clearly a legal matrix operation and should give me a (97,1) vector EDIT: I have corrected this using X.dot(y) but the original question still remains.
Based on your comments to orip’s post, I guess this is what happened: You edited __init__.py on windows. The windows editor added something non-printing, perhaps a carriage-return (end-of-line in Windows is CR/LF; in unix it is LF only), or perhaps a CTRL-Z (windows end-of-file). You used WinSCP to copy the file to your unix box. … Read more
Python 3.6 will add literal string interpolation similar to Ruby’s string interpolation. Starting with that version of Python (which is scheduled to be released by the end of 2016), you will be able to include expressions in “f-strings”, e.g. Prior to 3.6, the closest you can get to this is The % operator can be … Read more
Environment variables are accessed through os.environ Or you can see a list of all the environment variables using: As sometimes you might need to see a complete list! The Python default installation location on Windows is C:\Python. If you want to find out while running python you can do:
First option: (Easiest, recommended) Open Notepad++. On the menu go to: Run -> Run.. (F5). Type in: Now, instead of pressing run, press save to create a shortcut for it. Notes If you have Python 3.1: type in Python31 instead of Python26 Add -i if you want the command line window to stay open after … Read more
There’s a function in the standard-library for this: itertools.permutations. If for some reason you want to implement it yourself or are just curious to know how it works, here’s one nice approach, taken from http://code.activestate.com/recipes/252178/: A couple of alternative approaches are listed in the documentation of itertools.permutations. Here’s one: And another, based on itertools.product:
In Python, strings are immutable, so you can’t change their characters in-place. You can, however, do the following: The reasons this works is that it’s a shortcut for: The above creates a new string with each iteration, and stores the reference to that new string in s2.