python-3.x

问题 I'm running calc.exe (windows 10, python 3.6) using proc = subprocess.Popen("calc.exe") , then time.sleep(time) and then want to kill process: os.kill(proc.pid, -9) or os.kill(proc.pid, signal.SIGTERM) gives me error "Access Denied". I also tried proc.terminate - it didn't help. And I also noticed that proc.pid gives different PID from PID which is shown in task manager. Any ideas how to kill my process? Thanks! 回答1: You can try using windows to kill the process. command = "Taskkill /IM calc

问题 Kivy documentation states that "Touching the spinner displays a dropdown menu with all the other available values from which the user can select a new one." Is there any workaround to tell if it is an old value a user selected in order to perform the same action? I am really stuck with this, please help me out. 回答1: Rather than using the on_text or on_select , you can use the Buttons that make up the DropDown to trigger whatever method you want to run. That way, it doesn't matter whether the

问题 I'm running calc.exe (windows 10, python 3.6) using proc = subprocess.Popen("calc.exe") , then time.sleep(time) and then want to kill process: os.kill(proc.pid, -9) or os.kill(proc.pid, signal.SIGTERM) gives me error "Access Denied". I also tried proc.terminate - it didn't help. And I also noticed that proc.pid gives different PID from PID which is shown in task manager. Any ideas how to kill my process? Thanks! 回答1: You can try using windows to kill the process. command = "Taskkill /IM calc

问题 What is the exact usage of Turtle.tracer? In python docs it is written Turn turtle animation on/off and set delay for update drawings. I use it for disabling animation but the arguments are not clear for example in this code if I use turtle.trace turtle doesn't draw rest of table how to set correct arguments. import turtle turtle.width(5) yd=xd=-64 turtle.tracer(8,25)#This is the problem for i in range(2): turtle.up() turtle.goto(-197.5,yd) turtle.down() turtle.seth(0) turtle.fd(394) yd+=128

问题 What is the exact usage of Turtle.tracer? In python docs it is written Turn turtle animation on/off and set delay for update drawings. I use it for disabling animation but the arguments are not clear for example in this code if I use turtle.trace turtle doesn't draw rest of table how to set correct arguments. import turtle turtle.width(5) yd=xd=-64 turtle.tracer(8,25)#This is the problem for i in range(2): turtle.up() turtle.goto(-197.5,yd) turtle.down() turtle.seth(0) turtle.fd(394) yd+=128

问题 I would like to detect if user has clicked the 'maximize' button: In tkInter of course, but I don't know how. I have tried searching through StackOverflow, The Web & tkInter documents(mostly effbot's tkinterbook), but have not found anything related to what I am trying to get. 回答1: There is a good way to does it using .bind() , so let's get started! As we know, we can maximize the window using the command .state('zoomed') . root.state('zoomed') And we can get whatever window event by .bind("

问题 I want to extract the text from an image in python . In order to do that, I have chosen pytesseract . When I tried extracting the text from the image, the results weren't satisfactory. I also went through this and implemented all the techniques listed down. Yet, it doesn't seem to perform well. Image: Code: import pytesseract import cv2 import numpy as np img = cv2.imread('D:\\wordsimg.png') img = cv2.resize(img, None, fx=1.2, fy=1.2, interpolation=cv2.INTER_CUBIC) img = cv2.cvtColor(img, cv2

问题 I would like to detect if user has clicked the 'maximize' button: In tkInter of course, but I don't know how. I have tried searching through StackOverflow, The Web & tkInter documents(mostly effbot's tkinterbook), but have not found anything related to what I am trying to get. 回答1: There is a good way to does it using .bind() , so let's get started! As we know, we can maximize the window using the command .state('zoomed') . root.state('zoomed') And we can get whatever window event by .bind("

问题 How can I get only filtered values from spreadsheet? If user have filtered some values, I don't need them. 回答1: You want to retrieve the values from the filtered sheet. The filter is the basic filter. For example, when the values are put in the cells "A1:J25" and the values of "A4:J4" and "A11:J11" are shown by the filter, you want to retrieve the values of cells of "A4:J4" and "A11:J11". You want to achieve this using pygsheets. You have already been able to get and put values for Google

问题 How can I get only filtered values from spreadsheet? If user have filtered some values, I don't need them. 回答1: You want to retrieve the values from the filtered sheet. The filter is the basic filter. For example, when the values are put in the cells "A1:J25" and the values of "A4:J4" and "A11:J11" are shown by the filter, you want to retrieve the values of cells of "A4:J4" and "A11:J11". You want to achieve this using pygsheets. You have already been able to get and put values for Google