The literally first example on the page you link to works. So I’m just going to copy and paste it here and change two values. from multiprocessing import Pool def f(x): return x*x if __name__ == ‘__main__’: with Pool(100) as p: print(p.map(f, range(100))) EDIT: you just said that you’re using Google colab. I think google … Read more
The build only takes a Sample object. You have to convert your numpy array: import openturns as ot import numpy as np sample = ot.Sample(np.array([(1.0, 2.0), (3.0, 4.0), (5.0, 6.0)])) For the conversion to happen, your data need to have the proper shape: (n_sample, dimension) In this example, we have 3 sample and the dimension … Read more
This function should be very close to what you want. I’ve tested it in both Python 2.7.9 and 3.4.2. The initial version I posted had some problems because — as I mention then — it was untested. I’m not sure if you’re using Python 2 or 3, but this worked properly in either one. Another … Read more
rows = [(‘x’,’y’)] That mean you have a list with one element and a tuple as its element. Your list contains one element: (‘x’,’y’) at index 0. Your tuple contains two elements: ‘x’ at index 0 and ‘y’ at index 1. To have Y: rows[0][1]: rows [0] [1] ^ ^ | | List Index Tuple … Read more
We know school principle: if the sum of decimal digits is divisible by 9, then number is divisible by 9. The same approach works for any base of number system b and divisor b-1: for base=4 we can check that sum of two-bits chunks is divisible by 3. We can repeat this process until all … Read more
Wouldn’t it have been far easier to just copy in the text than to print-screen and crop the image? The number of tries is initialized to 1 which is misleading as at that point in the program there hasn’t been any tries. Logically it makes more sense to initialize tries to 0 and place the … Read more
It’s because when doing: def calc_tax(sales_total,tax_rate=0.04): print(sales_total * tax_rate) You can do: calc_tax(100) Then here tax_rate is an argument that’s assigned to a default value so can change it by: calc_tax(any thing here,any thing here) OR: calc_tax(any thing here,tax_rate=any thing here) So in the other-hand, this code: def calc_tax(sales_total): print(sales_total*0.04) Is is only able to … Read more
If I understand the question correctly, you want to get the single bytes of the jpg-file, which can be read with a DataInputStream: File imageFile; DataInputStream dis = new DataInputStream(new FileInputStream(imageFile)); int input = dis.read(); dis.close(); input then holds the first byte of the file, if you invoke read again (before dis.close()), you can read … Read more
Here are hundreds of ways to do this. I think one of the simplest ones is using list comprehension, like: ones = [1 for i in range(50)] 3 solved What are the possible ways to create a list containing 50 ones in python? [duplicate]
not quite sure what you what to do, but i guess this should work: for elem in line: if type(elem) == int: result += 1 elif type(elem) == list: for sub in elem: if type(sub) == int: result += 1 bear in mind that this code is realy ugly 😉 but it should help get … Read more
Sure, there are many ways. Simplest: def func(alist): return zip(alist, alist[1:]) This spends a lot of memory in Python 2, since zip makes an actual list and so does the slicing. There are several alternatives focused on generators that offer memory savings, such as a very simple: def func(alist): it = iter(alist) old = next(it, … Read more
Apply a default value to the ListNum argument: def multiply (ListNum = None): if ListNum is None: print ‘You forgot something…’ 4 solved Python function define: A message will prompt up if missing entering an argument
Your list is separated into values. # movies: values 0. “The Holy Grail” 1. 1975 2. “Terry Jones and Terry Gilliam” 3. 91 4. [“Graham Champman”, [“Michael Palin”, “John Cleese”, “Terry Gilliam”, “Eric Idle”, “Terry Jones”]] /!\ The index begin from 0 The last value is also separated into values: # movies[4]: values 0. “Graham … Read more
Here’s a quick function to do this looping through the tuples and comparing each tuple to the label of the previous tuple and concatenating them if the labels match. def parse_tuples(x): prev_tuple = list(x[0]) parsed = [] for i in x[1:]: if i[1] == prev_tuple[1]: prev_tuple[0] += i[0] else: parsed.append(tuple(prev_tuple)) prev_tuple = list(i) parsed.append(tuple(prev_tuple)) return … Read more
What you’re trying to develop already exists for many years, and with multiple implementations: Wireshark TCPDump. Both applications can write the packets in the PCAP format. Bear in mind that these applications require root access and privileges as they ask the kernel to fork the incoming packets to your application. 6 solved What is needed … Read more