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How to find nodes without outbound edges in networkx?

2017-08-12

I try to find nodes without outbound borders in a digraph in networkx. Is there a way to do this? I've found isolates, but it's got edges without inbound or outbound borders, and I do not want that. If G is your DiGraph , you can get a well iterator

Validating a password with Python

2017-08-12

I'm trying to create a password program in python? The password conditions are as follows: The password must contain at least one special character and a number The length of the password must be at least 8 The first letter of password should be an a

Boolean as key in dictionary causes strange problems?

2017-08-12

I'm new to Python and I'm learning about dictionaries. I put values ​​and random types in a dictionary. Here is what confuses me: stuff = {True: 1234, 1: 2} print(stuff[True]) print(len(stuff)) When you execute this bit of code, the output is: 2 1 Ho

Parallelization of graph tasks in Python

2017-08-12

This could be a naive question, but I have really tried to search for multiple resources: multiprocessing and ipyparallel but these seem to be the lack of appropriate information for my task. What I have is a large graphic directed G with 9 million e

find the maximum index in a matrix in python

2017-08-12

I have a matrix. I want to find the index of the maximum value in each row of the matrix. the problem is that this matrix is ​​the result of another algorithm, so I can not use many ways to do it. [[ 6.02 6.02 6.02 6.02 6.02 6.02 6.02 9.94 6.02 6.02]

Why does repr () add escape characters?

2017-08-12

From the clock decorator below, import time from functools import wraps DEFAULT_FMT = '[{elapsed:0.8f}s] {name}({args}) -> {result}' def clock(fmt=DEFAULT_FMT): def decorate(func): @wraps(func) def wrapper(*args): t0 = time.time() result = func(*args

Effective computation of particle pair interactions

2017-08-12

I have an N-body simulation that generates a list of particle positions, for several timestaps in the simulation. For a given frame, I want to generate a list of particle pair indices (i, j) so that dist(p[i], p[j]) < masking_radius . Essentially, I

How to remove the TKinter Python widget editor

2017-08-12

I try to set up a simple frame work for a fast paced game, the images are named in series of 6 for each stage of failure. S0 is the start and S6 is the final phase. I try to figure out how to mount the picture. from tkinter import * from PIL import I

isPrime function; Explanation of scope () required

2017-08-12

This question was asked again, but I need an explanation on a specific section, an answer I found online: # prime numbers are only divisible by unity and themselves # (1 is not considered a prime number by convention) def isprime(n): '''check if inte

How do I import the installed Python module?

2017-08-12

I just installed a Python package using pip: $ sudo pip install py_vollib Password: Collecting py_vollib Downloading py_vollib-1.0.1.tar.gz Collecting py_lets_be_rational (from py_vollib) Downloading py_lets_be_rational-1.0.1.tar.gz Requirement alrea