python-2.7

问题 I have a Python assignment where I need to describe the order in which Python ran the program by identifying line numbers. This is to help us understand the try/except and errors. I'm pretty sure I've achieved this through inspection, but I wanted to know if Python has the ability to print out the flow by line numbers so I may check my work. If Python does not have this built in, is there a way in which I could do this? I am working with Python 2.7. 回答1: Try the trace module: Example: test.py

问题 I would like to display a window with a single Frame and a Label in the Frame which would stretch to the whole width of the window The following code import Tkinter as tk root = tk.Tk() root.geometry("100x100") # first column of root will stretch root.columnconfigure(0, weight=1) # a frame in root upper_frame = tk.Frame(root) # first column of upper_frame will stretch upper_frame.columnconfigure(0, weight=1) upper_frame.grid(row=0, column=0) # a label in upper_frame, which should stretch

问题 I would like to display a window with a single Frame and a Label in the Frame which would stretch to the whole width of the window The following code import Tkinter as tk root = tk.Tk() root.geometry("100x100") # first column of root will stretch root.columnconfigure(0, weight=1) # a frame in root upper_frame = tk.Frame(root) # first column of upper_frame will stretch upper_frame.columnconfigure(0, weight=1) upper_frame.grid(row=0, column=0) # a label in upper_frame, which should stretch

问题 A PyQt4 app runs ping in a QProcess . A QTextEdit named self.output will output everything from ping . A second QTextEdit named self.summary will only output the line if it contains the string TTL . Problem: I have managed to get self.output working but not self.summary as I am not sure how to write its code in the dataReady function. Any ideas? import sys from PyQt4 import QtGui, QtCore class MainWindow(QtGui.QMainWindow): def __init__(self): super(MainWindow, self).__init__() self.initUI()

问题 A PyQt4 app runs ping in a QProcess . A QTextEdit named self.output will output everything from ping . A second QTextEdit named self.summary will only output the line if it contains the string TTL . Problem: I have managed to get self.output working but not self.summary as I am not sure how to write its code in the dataReady function. Any ideas? import sys from PyQt4 import QtGui, QtCore class MainWindow(QtGui.QMainWindow): def __init__(self): super(MainWindow, self).__init__() self.initUI()

问题 A PyQt4 app runs ping in a QProcess . A QTextEdit named self.output will output everything from ping . A second QTextEdit named self.summary will only output the line if it contains the string TTL . Problem: I have managed to get self.output working but not self.summary as I am not sure how to write its code in the dataReady function. Any ideas? import sys from PyQt4 import QtGui, QtCore class MainWindow(QtGui.QMainWindow): def __init__(self): super(MainWindow, self).__init__() self.initUI()

问题 I'm getting stuck on what I think is a basic multiprocess and threading issue. I've got a multiprocess set up, and within this a thread. However, when I set up the thread class within the init function, I get the following error: "TypeError: can't pickle thread.lock objects". However, this does not happen if the thread is set up outside of the init function. Does anyone know why this is happening? Note I'm using Windows. Some code is below to illustrate the issue. As typed below, it runs fine

问题 I'm trying to do a timer function in Tkinter python, in which I want to call one method consecutively in timer events. My program is plain sub class, it doesn't contain root or master since I kept master class separate so I am struggling to write the after function, is it possible to write the after function without root? Because calling tk will display the unwanted tk window , I just want to see the timer event output only in my Python shell, is it possible? class App(): def __init__ (self):

问题 I'm trying to do a timer function in Tkinter python, in which I want to call one method consecutively in timer events. My program is plain sub class, it doesn't contain root or master since I kept master class separate so I am struggling to write the after function, is it possible to write the after function without root? Because calling tk will display the unwanted tk window , I just want to see the timer event output only in my Python shell, is it possible? class App(): def __init__ (self):

问题 What is the Python2.7 equivalent to from urllib.parse import urlparse, parse_qs parsed_url = urlparse(url) params = parse_qs(parsed_url.query) I get >>> from urllib.parse import urlparse Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: No module named parse Thanks! 回答1: In python2 use from urlparse import urlparse, parse_qs parsed_url = urlparse(url) params = parse_qs(parsed_url.query) 来源： https://stackoverflow.com/questions/50638366/url-parse-python2-7