Recent questions tagged Python

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python - MySql cursors.execute() with only one parameter: Why is a string sliced into a list?

Status Quo: I have a working database with tables and can query, insert, update, etc. Also the cursor is connected ... query, (idProduct, 'A')) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Why is B = numpy.dot(A,x) so much slower looping through doing B[i,:,:] = numpy.dot(A[i,:,:],x) )?

I'm getting some efficiency test results that I can't explain. I want to assemble a matrix B whose i-th entries B ... completes in %.3f s" % td3 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Inconsistent comprehension syntax?

I just stumbled over what seems to be a flaw in the python syntax-- or else I'm missing something. See ... ? Why is this so inconsistent? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Does Tkinter have a refresh method?

I am using Tkinter. import Tkinter as tk class App(tk.Frame): def __init__(self, *args, **kwargs): tk.Frame ... . Is root.refresh() is possible? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Permission denied when installing Tensorflow

I am trying to install TensorFlow by Anaconda(My Python is 3.5.2 edition). When I run: (tensorflow)C:> pip ... . Can someone help me with that? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Disable DTR in pyserial from code

I'm trying to use pyserial to send data to an arduino. But when I open the COM port it sets DTR low ... the chip can be programmed as normal. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Why is numpy.prod() incorrectly returning negative results, or 0, for my long lists of natural numbers?

I'm just working on Project Euler problem 12, so I need to do some testing against numbers that are multiples of over ... >>> np.prod(array) 0 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - json reading error json.decoder.JSONDecodeError: Invalid escape

I am writing a code to upload a model (train_and_upload_demo_model.py) in solr using "config.json" file ... to pass directory location. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Dictionary/set comprehensions inside of f-string

Is it possible to have a dictionary or set comprehension inside of an f-string in python 3.6+? It seems ... comprehensions inside of f-strings? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python 3.x - WinError 10061 - No Connection Could be made

I'm debugging a simple program, that has worked in the past. I've singled out the instruction where the error takes ... a few Apps from my PC. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Map a NumPy array of strings to integers

Problem: Given an array of string data dataSet = np.array(['kevin', 'greg', 'george', 'kevin'], dtype= ... numpy to its full potential here. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Can I detect if my code is running on cPython or Jython?

I'm working on a small django project that will be deployed in a servlet container later. But development is much ... a simple way to do this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - zip_longest without fillvalue

I am searching for a middle ground between Python's zip and zip_longest functions (from the itertools module) ... approach seems most efficient? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Convert an integer to binary without using the built-in bin function

This function receives as a parameter an integer and should return a list representing the same value expressed in binary as a ... 11) [1,0,1,1] See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - error: [Errno 98] Address already in use

I'm creating a simple flaskapp which I'm going to deploy on heroku, first time deploying a python app on ... it, any help is appreciated. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - What is returned by wave.readframes?

I assign a value to a variable x in the following way: import wave w = wave.open('/usr/share/sounds/ ... Can I transform them into integer? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Why would MySQL execute return None?

I am trying to query on a local MySQL database using Python's (3.4) MySQL module with the following ... MySQL execute function return None? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Why am i getting WindowsError: [Error 5] Access is denied?

Trying to create program that adds folders into program files-recieving this error: WindowsError: [Error 5] Access is ... numb==11: x=False See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How to convert datetime.time from UTC to different timezone?

I have variable which holds time which is of type datetime.time in UTC, I wanted it to convert to some other ... need 't' in UTC format. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How do I change the pygame icon?

Does anyone know how to change the pygame icon? I found a thing on the pygame website that lets you do ... makes the pygame window very small. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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178 views

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python - What is cross browser support for JavaScript 1.7's new features? Specifically array comprehensions and the "let" statement

https://developer.mozilla.org/en/New_in_JavaScript_1.7 A lot of these new features are borrowed from Python, and ... What about other browsers? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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293 views

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python - cx_Freeze: “No module named 'codecs'” Windows 10

I am currently making a game using pygame module. I have followed the following links' directions. https:// ... in the init.py file. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Regex - match returns None. Where am I wrong?

>>> import re >>> s = 'this is a test' >>> reg1 = re.compile('test$') >>> match1 = reg1.match(s) >>> ... (I tried re.compile(r'test$') as well) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - better way to invert case of string

I am learning python and meet an exercise: Strings. Create a function that will return another string similar to ... My solution seems strange. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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175 views

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python - Dot notation string manipulation

Is there a way to manipulate a string in Python using the following ways? For any string that is stored in ... remove it, otherwise, leave it. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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132 views

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python - How to find the first index of any of a set of characters in a string

I'd like to find the index of the first occurrence of any special character in a string, like so: >>> " ... sane way to do this in Python? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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857 views

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python - Error while downloading the requirements using pip install (setup command: use_2to3 is invalid.)

version pip 21.2.4 python 3.6 The command: pip install -r requirments.txt The content of my requirements.txt: ... found for mongoengine==0.19.1 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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820 views

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python - Illegal instruction(core dumped) tensorflow

I am importing tensorflow in my ubuntu python using following commands- $ python3 Python 3.5.2 (default, Nov ... . Please specify the solution. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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