python-3.x

问题 This question already has answers here : Star * operator on left vs right side of an assignment statement (1 answer) Please explain the *elements,=iterable construct [duplicate] (1 answer) Closed 3 years ago . I just started to learn python. I was following an example where they have used * before declaring a variable. My question is that what is the purpose of using this. Example, I am following for i in range(n): name, *l = input().split() s = list(map(float, l)) a[name] = s After printing

问题 Why am I receiving this error when I run this code? Traceback (most recent call last): File "main.py", line 13, in <module> def twoSum(self, nums: list[int], target: int) -> list[int]: TypeError: 'type' object is not subscriptable nums = [4,5,6,7,8,9] target = 13 def twoSum(self, nums: list[int], target: int) -> list[int]: dictionary = {} answer = [] for i in range(len(nums)): secondNumber = target-nums[i] if(secondNumber in dictionary.keys()): secondIndex = nums.index(secondNumber) if(i !=

问题 If you wait out the 4 seconds it says "You ran out of time" which is good. But then, to keep the loop going, you will have to press the enter key to continue. I want so that when it prints "You ran out of time" underneath instead of just typing, that it displays an input statement like "Type 'attack' to keep going" and the loop would continue from where it was. from threading import Timer import time monsterhp = int(800) y = 150 while monsterhp > 0: timeout = 4 t = Timer(timeout, print, ['You

问题 If you wait out the 4 seconds it says "You ran out of time" which is good. But then, to keep the loop going, you will have to press the enter key to continue. I want so that when it prints "You ran out of time" underneath instead of just typing, that it displays an input statement like "Type 'attack' to keep going" and the loop would continue from where it was. from threading import Timer import time monsterhp = int(800) y = 150 while monsterhp > 0: timeout = 4 t = Timer(timeout, print, ['You

问题 Details: Currently I am writing within a project based on Magento Cloud test cases with Python-Selenium. So far everything is fine. Currently I only have one problem, which I can't explain anymore. Actually it's only about the verification of a text. Or the verification of a block title within a profile page. I would like to secure multiple times, and thus define 2 different test cases. issues I always get the following message. selenium.common.exceptions.StaleElementReferenceException:

问题 I have a list of item, where I want to remove the occurrence of any duplicates for one item, but keep any duplicates for the rest. I.e. I start with the following list mylist = [4, 1, 2, 6, 1, 0, 9, 8, 0, 9] I want to remove any duplicates of 0 but keep the duplicates of 1 and 9 . My current solution is the following: mylist = [i for i in mylist if i != 0] mylist.add(0) Is there a nice way of keeping one occurrence of 0 besides the following? for i in mylist: if mylist.count(0) > 1: mylist

问题 Objective I need a reliable way to check in Python if a domain of any TLD has been registered or is available. The bold phrases are the key points that I'm struggling with. What I tried? WHOIS is the obvious way to do the check and an existing Python library like the popular python-whois was my first try. The problem is that it doesn't seem to be able to retrieve information for some of the TLDs, e.g. .run , while it works mostly fine for older ones, e.g. .com . So if python-whois is not

问题 How I disable Entry in Tkinter. def com(): .... entryy=Entry() entryy.pack() button=Button(text="Enter!", command=com, font=(24)) button.pack(expand="yes", anchor="center") As I said How I disable Entry in com function? 回答1: Set state to 'disabled' . For example: from tkinter import * root = Tk() entry = Entry(root, state='disabled') entry.pack() root.mainloop() or from tkinter import * root = Tk() entry = Entry(root) entry.config(state='disabled') # OR entry['state'] = 'disabled' entry.pack(

问题 Good morning, After a lot of attemps running from wand.image import Image I get the following error: Traceback (most recent call last): File "C:\Users\XXXXX\PycharmProjects\PDF_convert\venv\lib\site-packages\wand\api.py", line 180, in <module> libraries = load_library() File "C:\Users\XXXXX\PycharmProjects\PDF_convert\venv\lib\site-packages\wand\api.py", line 135, in load_library raise IOError('cannot find library; tried paths: ' + repr(tried_paths)) OSError: cannot find library; tried paths:

问题 Good morning, After a lot of attemps running from wand.image import Image I get the following error: Traceback (most recent call last): File "C:\Users\XXXXX\PycharmProjects\PDF_convert\venv\lib\site-packages\wand\api.py", line 180, in <module> libraries = load_library() File "C:\Users\XXXXX\PycharmProjects\PDF_convert\venv\lib\site-packages\wand\api.py", line 135, in load_library raise IOError('cannot find library; tried paths: ' + repr(tried_paths)) OSError: cannot find library; tried paths: