python-3.x

问题 Tried searching for this and could not find a suitable answer. I know we can do the following to create a menu to the root window in tkinter menu = Menu(root) some_menu = Menu(menu, ....) some_menu.add_command(label = some text, command = some command) .... menu.add_cascade(label = some title, menu = some_menu) root.config(menu = menu) now let's say that we passed some_menu to the root config instead then it would display the cascade menu's options / children horizontally across the top bar

问题 Tried searching for this and could not find a suitable answer. I know we can do the following to create a menu to the root window in tkinter menu = Menu(root) some_menu = Menu(menu, ....) some_menu.add_command(label = some text, command = some command) .... menu.add_cascade(label = some title, menu = some_menu) root.config(menu = menu) now let's say that we passed some_menu to the root config instead then it would display the cascade menu's options / children horizontally across the top bar

问题 I have the following toy interface: from PyQt5 import QtWidgets, QtGui, QtCore class MainWindow(QtWidgets.QMainWindow): def __init__(self): super(MainWindow, self).__init__() w = QtWidgets.QWidget() layout = QtWidgets.QVBoxLayout() w.setLayout(layout) self.setCentralWidget(w) my_tree = QtWidgets.QTreeWidget() layout.addWidget(my_tree) alpha = QtWidgets.QTreeWidgetItem(my_tree, ['Alpha']) beta = QtWidgets.QTreeWidgetItem(my_tree, ['Beta']) alpha.addChild(QtWidgets.QTreeWidgetItem(['one']))

问题 I have tried with the replace in python. But it wouldn't work. my_list=[['the', 'production', 'business', 'environmentâ\xa0evaluating', 'the'], ['impact', 'of', 'the', 'environmental', 'influences', 'such'], ['as', 'political', 'economic', 'technological', 'sociodemographicâ\xa0']] my_list.replace(u'\xa0', ' ') and my_list[0].replace(u'\xa0', ' ') For this got the attribute error. AttributeError: 'list' object has no attribute 'replace' How to remove this unwanted string from the list my_list

问题 I have tried with the replace in python. But it wouldn't work. my_list=[['the', 'production', 'business', 'environmentâ\xa0evaluating', 'the'], ['impact', 'of', 'the', 'environmental', 'influences', 'such'], ['as', 'political', 'economic', 'technological', 'sociodemographicâ\xa0']] my_list.replace(u'\xa0', ' ') and my_list[0].replace(u'\xa0', ' ') For this got the attribute error. AttributeError: 'list' object has no attribute 'replace' How to remove this unwanted string from the list my_list

问题 i am working on a an api project there is a part in it which takes input from the user about Google meeting code and enter him to the google meeting the real problem is when i give it instructions to click on the button of Ask to join i have tried this : 1. driver.find_element_by_xpath( "//button[text()='Ask to join']").click() 2. driver.find_element_by_xpath( '//*[@id="yDmH0d"]/div[3]/div/div[2]/div[3]/div/span/span').click() 3. i also tried using class name every method best to my knowledge

问题 I have an MIP model written with docplex and a solution pool written with cplex. My model has billions of solutions in reality. I need to solve this model several times (10 for example) with a certain populate number (10,000 for example) but I need the solutions of these multiple solves to be entirely different than each other. How can I achieve that with cplex? Is there a parameter or a approach for it? 回答1: You can use a diversity filter for the solution pool, see CPLEX > User's Manual for

问题 I have QTableWidget in which I have QComboBox in each row for particular column. My each QCombobox has multiple values with checkboxes. I want to display selected item/s from each combobox in the next respective column 'SelectedMonths' in the same row and remove them when unchecked (Vice-versa). Until now I have Script ready which gives me what all items have been checked/unchecked but I dont know how to get the index of the row for which combobox is activated. Snippet to get the workflow

问题 I have debugging my code and here is what I found: img = cv2.resize(img, (224, 224)) cv2.imshow("img",img) cv2.waitKey(0) cv2.destroyAllWindows() img = (img / 127.5) - 1 cv2.imshow("img",(127.5*(img+1)).astype(int)) cv2.waitKey(0) cv2.destroyAllWindows() these operations don't output the same picture even tough they are same, does somebody konow why? 回答1: Try checking the dtype each time you display: print(img.dtype) 来源： https://stackoverflow.com/questions/63371878/opencv-didnt-output-images

问题 How to avoid the name clash of pymongo's bson module and bson's (py-bson on GitHub) bson module? 回答1: Install bson package as pybson , see https://github.com/py-bson/bson/issues/70. I have used pip uninstall bson and pip install pybson now so that I can use import pybson as bson when I want the old name back. If I accidentally need both pymongo 's and pybson 's import bson , I can use aliases. 来源： https://stackoverflow.com/questions/63068007/name-clash-of-two-different-bson-modules-how-can-i