python-3.x

问题 I am trying to apply mask on an image using opencv bitwise-not. I am able to achieve this result if I read both original and mask image in Greyscale mode, but it doesn't work on 3 channel images. I have read this thread OpenCV Python Error: error: (-215) (mtype == CV_8U || mtype == CV_8S) && _mask.sameSize(*psrc1) in function cv::binary_op but my problem isn't shapes of arrays or mask not being in uint8 format. import cv2 import numpy as np img = cv2.imread("Original.png") # original image,

问题 I'm reading in a text file. I've been doing it just fine with python2, but I decided to run my code with python3 instead. My code for reading the text file is: neg_words = [] with open('negative-words.txt', 'r') as f: for word in f: neg_words.append(word) When I run this code on python 3 I get the following error: UnicodeDecodeError Traceback (most recent call last) <ipython-input-14-1e2ff142b4c1> in <module>() 3 pos_words = [] 4 with open('negative-words.txt', 'r') as f: ----> 5 for word in

问题 Say in Tkinter you have a listbox of a certain size within a window. Then let's say you add a string to that listbox that is larger than that size. If you highlight this element and drag to the side the listbox will automatically "scroll" itself so that you can see the full element. Is there anyway to disable this short of running a thread that repeatedly attempts to set the scroll to 0? import tkinter root = tkinter.Tk() listbox = tkinter.Listbox(root) listbox.insert("end", "Minimal,

问题 Going back and forth through the documentation, I was able to set-up a dynamic parameter estimation in Gekko. Here's the code, with measurement values shown below (the file is named MeasuredAlgebrProductionRate_30min_18h.csv on my system, and uses ; as separator): import numpy as np import matplotlib.pyplot as plt from gekko import GEKKO #%% Read measurement data from CSV file t_x_q_obs = np.genfromtxt('MeasuredAlgebrProductionRate_30min_18h.csv', delimiter=';') #t_obs, x_obs, q_obs = t_xq

问题 Going back and forth through the documentation, I was able to set-up a dynamic parameter estimation in Gekko. Here's the code, with measurement values shown below (the file is named MeasuredAlgebrProductionRate_30min_18h.csv on my system, and uses ; as separator): import numpy as np import matplotlib.pyplot as plt from gekko import GEKKO #%% Read measurement data from CSV file t_x_q_obs = np.genfromtxt('MeasuredAlgebrProductionRate_30min_18h.csv', delimiter=';') #t_obs, x_obs, q_obs = t_xq

问题 The code generates a series of URLs and searches them for a specific string. As the website requires login information: I logged in the website through my browsers. And for more checks, I tried only one complete URL(of the same website) with no values and encoding and it worked perfectly well. So I supposed the login information shouldn't be the problem. I did try to add log-in info through the code, but as it itself brought up a series of errors, I wanted to see if that is really necessary

问题 I have been creating a program in Python for merging 2 pdf files into a single file. Here is the code:- import os from PyPDF2 import PdfFileMerger source_dir = os.getcwd() merger = PdfFileMerger() for item in os.listdir(source_dir): if item.endswith('pdf'): merger.append(item) merger.write('completed_file.pdf') merger.close() while running the code i encountered the following error:- "F:\Python folder\Pdf_Merger\venv\Scripts\python.exe" "F:/Python folder/Pdf_Merger/main.py" Traceback (most

问题 Below is my dataframe: In [2804]: df = pd.DataFrame({'A':[1,2,3,4,5,6], 'D':[{"value": '126', "perc": None, "unit": None}, {"value": 324, "perc": None, "unit": None}, {"value": 'N/A', "perc": None, "unit": None}, {}, {"value": '100', "perc": None, "unit": None}, np.nan]}) In [2794]: df.columns = pd.MultiIndex.from_product([df.columns, ['E']]) In [2807]: df Out[2807]: A D E E 0 1 {'value': '126', 'perc': None, 'unit': None} 1 2 {'value': 324, 'perc': None, 'unit': None} 2 3 {'value': 'N/A',

问题 This is my first time working with Python. I'm trying to figure out how to round decimals in the simplest way possible. print("\nTip Calculator") costMeal = float(input("Cost of Meal:")) tipPrct = .20 print("Tip Percent: 20%") tip = costMeal * tipPrct print("Tip Amount: " + str(tip)) total = costMeal + tip print("Total Amount: " + str(total)) I need it to look like this image. 回答1: You should use Python's built-in round function. Syntax of round(): round(number, number of digits) Parameters

问题 This is my first time working with Python. I'm trying to figure out how to round decimals in the simplest way possible. print("\nTip Calculator") costMeal = float(input("Cost of Meal:")) tipPrct = .20 print("Tip Percent: 20%") tip = costMeal * tipPrct print("Tip Amount: " + str(tip)) total = costMeal + tip print("Total Amount: " + str(total)) I need it to look like this image. 回答1: You should use Python's built-in round function. Syntax of round(): round(number, number of digits) Parameters