As Toan suggests, a simple hack would be to just select the rows first, and then select the columns over that. >>> a[[0,1,3], :] # Returns the rows you want array([[ 0, 1, 2, 3], [ 4, 5, 6, 7], [12, 13, 14, 15]]) >>> a[[0,1,3], :][:, [0,2]] # Selects the columns you want as … Read more
Change your subplot settings to: plt.subplot(1, 2, 1) … plt.subplot(1, 2, 2) The parameters for subplot are: number of rows, number of columns, and which subplot you’re currently on. So 1, 2, 1 means “a 1-row, 2-column figure: go to the first subplot.” Then 1, 2, 2 means “a 1-row, 2-column figure: go to the … Read more
math.sqrt(x) is significantly faster than x**0.5. import math N = 1000000 %%timeit for i in range(N): z=i**.5 10 loops, best of 3: 156 ms per loop %%timeit for i in range(N): z=math.sqrt(i) 10 loops, best of 3: 91.1 ms per loop Using Python 3.6.9 (notebook).
There is a OSS project that uses WebDriver to take screen shots and then compares the images to see if there are any issues (http://code.google.com/p/fighting-layout-bugs/)). It does it by openning the file into a stream and then comparing every bit. You may be able to do something similar with PIL. EDIT: After more research I … Read more
Here’s the wiki page on embedding cython Assuming you installed python to C:\Python31 and you want to use Microsoft Compiler. smalltest1.py – is the file you want to compile. test.exe – name of the executable. You need to set the environmental variables for cl. C:\Python31\python.exe C:\Python31\Scripts\cython.py smalltest1.py –embed cl.exe /nologo /Ox /MD /W3 /GS- /DNDEBUG … Read more
This solution reads both files in one pass, excludes blank lines, and prints common lines regardless of their position in the file: with open(‘some_file_1.txt’, ‘r’) as file1: with open(‘some_file_2.txt’, ‘r’) as file2: same = set(file1).intersection(file2) same.discard(‘\n’) with open(‘some_output_file.txt’, ‘w’) as file_out: for line in same: file_out.write(line)
It is possible to do this. The setup is… not very straightforward, but the end result is that you can search the entire web from python with few lines of code. There are 3 main steps in total. 1st step: get Google API key The pygoogle‘s page states: Unfortunately, Google no longer supports the SOAP … Read more
newlist = oldlist[::-1] The [::-1] slicing (which my wife Anna likes to call “the Martian smiley”;-) means: slice the whole sequence, with a step of -1, i.e., in reverse. It works for all sequences. Note that this (and the alternatives you mentioned) is equivalent to a “shallow copy”, i.e.: if the items are mutable and … Read more
Dictionary views are essentially what their name says: views are simply like a window on the keys and values (or items) of a dictionary. Here is an excerpt from the official documentation for Python 3: >>> dishes = {‘eggs’: 2, ‘sausage’: 1, ‘bacon’: 1, ‘spam’: 500} >>> keys = dishes.keys() >>> values = dishes.values() >>> # … Read more
The first argument to Value is typecode_or_type. That is defined as: typecode_or_type determines the type of the returned object: it is either a ctypes type or a one character typecode of the kind used by the array module. *args is passed on to the constructor for the type. Emphasis mine. So, you simply cannot put … Read more