python-3.5

问题 I'd like to include Python.h (from the Python distribution in my Anaconda folder) in my project to call a python script. The program compiles fine when I don't include python. But as soon as I do, I get undefined reference errors to functions implemented in Qt classes (so not my own functions!). The python version I'd like to include is 3.5.5 . The part that confuses me most is undefined reference to QJsonValue::toString() . This method is implemented inline so how can its implementation not

问题 I have two classes: a parent class and a container class. The parent class instance has matching container class instance as a weak reference. There is a problem while deep copying the parent instance, the weakref is still linking to the original instance. Here is a minimal example: import weakref from copy import deepcopy class Container: def __init__(self, parent): self.parent = weakref.ref(parent) class Parent: def __init__(self): self.container = Container(self) if __name__ == '__main__':

问题 I'm trying to create a function rotate_character(char, rot) that receives a character, "char" (a string with a length of 1), and an integer "rot". The function should return a new string with a length of 1, which is the result of rotating char by rot number of places to the right. So an input of "A" for char and "13" for rot would return N (with A having an initial value of 0, and B having an initial value of 1, etc). Capitalization should be maintained during rotation. I already created a

问题 I have installed on Debian Jessie: Python2.7 Python3.5 I have also installed Jupyter via pip2 and pip3 However when I launch jupyter-notebook I can only use python3 as kernel! How can I switch to pyhton2.7 when using Jupyter? 回答1: I tried this with a fresh Debian 8.5 machine on Digital Ocean. As root, install pip and jupyter from apt, and the development packages, too. apt-get install python-pip python-dev python3-pip python3-dev libzmq3 pip3 install jupyter Add the kernel for Python2 using

问题 I am trying to write code which uses the Coroutine class, as described in the typing documentation. It's look like it's available in python 3.5 , but when I am typing to import it throws me an ImportError : In [1]: from typing import Coroutine ImportError: cannot import name 'Coroutine' Then, I tried to run the code in Python 3.6 and it worked fine. Does this class not available in python 3.5 ? If not, why it's appear in the documentation (of python 3.5 in particular)? I tried to run it with

问题 I'd like to add Python 3.5 type hints for dynamically generated object attributes, so that IDEs correctly autocomplete them. Here by "dynamical" I mean that the attribute is not present during class creation or in __init__ or any other method. E.g. is there a way to add these through comments or other tricks? If not I can fallback to add dummy class attributes. Example:: class Request: """Example HTTP request object. We have `get_user()` but we do not declare it anyhere. """ ... # Pyramid's

问题 I have three people (with option of adding more people) and I want to show each person friends list as a circle. So, 1 circle per person. Next, I want to add edges(connections) if two people have same friend. Mike_friends = ['Al', 'Niki', 'Silvia', 'Anna', 'Matt', 'Gia', 'Nick', 'Maud', 'Sarah', 'Lisa', 'Kelvin'] Alex_friends = ['Harvey', 'Steve', 'Michael', 'Maud', 'Al', 'Kam', 'Hank'] Stephen_friends = ['Lisa','Rosie','Mango','Kate','Nate','Maud','Kelvin','Elvis','Arstad','Jesus','Johan',

问题 I have an Ubuntu 16.04 OS with ROS kinetic . When I open a terminal and type python it loads python 2.7, and as I try to import imutils it says it's not there. Then, I tried to install it with pip install imutils , but it says: requirment already satisfied in bla/bla/python3.5/bla. If I open the terminal and type python3 , it loads Python 3.5 , and when I try to import that lib, it complaints that it can't find cv2 , and gives an address pointing to where the Python ROS package is located (

问题 Fabric 2.0.1 Errors out when running my project that calls out fabfile.py. Im on Python 3.5.1. Does anyone know why is this happening? Traceback (most recent call last): File ".bootstrap/_pex/pex.py", line 367, in execute File ".bootstrap/_pex/pex.py", line 293, in _wrap_coverage File ".bootstrap/_pex/pex.py", line 325, in _wrap_profiling File ".bootstrap/_pex/pex.py", line 410, in _execute File ".bootstrap/_pex/pex.py", line 468, in execute_entry File ".bootstrap/_pex/pex.py", line 486, in

问题 This question already has an answer here : How to resume file download in Python? (1 answer) Closed last year . I am using python 3.5 requests module to download a file using the following code, how to make this code "auto-resume" the download from partially downloaded file. response = requests.get(url, stream=True) total_size = int(response.headers.get('content-length')) with open(file_path + file_name, "wb") as file: for data in tqdm(iterable = response.iter_content(chunk_size = 1024),