python-3.3

问题 I'm using Python 3.3 with Pygame and PygButton (low rep don't allow me more than two links) My files at the moment are [ int.py http://pastebin.com/sDRhieCG ] and [ scene.py http://pastebin.com/Y2Mgsgmr ]. The idea is making a mainloop in int.py the smaller as possible. The code has a commented-out example of the start_screen buttons at the mainloop. It works, but with every new screen the mainloop would be bloated. So I created a Scene class to apply background, texts and buttons. It works,

问题 I'm trying to implement some Python stuff into my program and I've decided to use Boost::Python, so I compiled it according to the instructions, with bjam, using mingw/gcc, getting dlls and .a files I'm using Code::Blocks for this, so I've put the dlls in the working directory of my project, where the rest of dlls I use are, and decided to run boost::python::exec("b = 5"); Instantly I get a crash. Ideas? #include <boost/python.hpp> float func(int a) { return a*a-0.5; } BOOST_PYTHON_MODULE

问题 I have written the code below: from PyQt4 import QtCore, QtGui import sys class window(QtGui.QMainWindow): def __init__(self, parent=None): super(window, self).__init__(parent) self.TreeWidget = QtGui.QTreeWidget() self.TreeWidget.setColumnCount(1) item1 = QtGui.QTreeWidgetItem(["Item 1"]) item1.setCheckState(0, QtCore.Qt.Checked) item2 = QtGui.QTreeWidgetItem(["Item 2"]) item2.setCheckState(0, QtCore.Qt.Unchecked) item3 = QtGui.QTreeWidgetItem(["Item 3"]) item3.setCheckState(0, QtCore.Qt

问题 When I try to install pywin32-220 it will be stopped by Norton saying that it's threat name "SONAR.Heuristic.132" and a "High risk file". It removes the pywin32-220 installer... So how can I get pywin32? Pywin32 download - http://sourceforge.net/projects/pywin32/files/?source=navbar SONAR.Heuristic.132 threat: (Norton link to details) http://www.symantec.com/security_response/writeup.jsp?docid=2015-061517-5721-99&vid=4294925827&product=Norton%20Internet%20Security&version=22.5.5.15&plang=sym

问题 How can I use print statement without newline and execute this immediately? Because this: print("first", end=" ") time.sleep(5) print("second") will print after 5 sec both: first second But I want to write 'first', wait for five seconds, and then write 'second'... 回答1: You need to flush stdout : print("first", end=" ", flush=True) stdout is line buffered, which means the buffer is flushed to your screen every time you print a newline. If you are not printing a newline, you need to flush

问题 I am trying to use matplotlib for real-time analysis from ECG-signals, but the problem starts even before. I use the PyCharm IDE, currently working with Python 3.3 and my os is Windows 8.1. For Matplotlib I downloaded matplotlib and the dependencies (numpy, six, dateutil, pyparsing, pytz) from here (the versions for Python 3.3): http://www.lfd.uci.edu/~gohlke/pythonlibs/ and installed it in the Python33 folder. Now if I try: from matplotlib.pyplot import plot, show plot(range(10)) show() or:

问题 I successfully installed NLTK 2.0.4, but when I tried to download the NLTK packages, i.e. nltk.download('stopwords') it doesn't work, so I am trying to install an updated version of NLTK for python 3 but it gives this error: >>> import nltk Traceback (most recent call last): File "<stdin>", line 1, in <module> File "C:\Users\Prashant\AppData\Roaming\Python\Python33\site-packages\nltk\_ nit__.py", line 37 except IOError, ex: ^ SyntaxError: invalid syntax Is there any way to install NLTK for

问题 I have tried multiple methods in doing this but none of them seem to work The answer comes up alphabetically instead f=open("class2.txt", "r") scores=myfile.readlines() print(sorted(scores)) f.close() ['Anne, 3\n', 'Dave, 10', 'Jack, 4\n', 'Lucy, 8\n'] Also is there any way to get rid of the "/n" when it goes to the shell? 回答1: Based on the inputs and outputs, I'm guessing you're trying to sort the input names by the associated values. To sort numerically, you can either parse all the values

问题 I have a Python 3.3 script which uses tkinter and tkinter.filedialog . The latter is being used in this particular line of one of the classes: self.root_folder = os.path.realpath(tk.filedialog.askdirectory(**self.dir_opt)) The code runs well in IDLE. However, after being converted to a binary executable using py2exe , the program runs, but raises the following exception when trying to call the named line: Exception in Tkinter callback Traceback (most recent call last): File "C:\Python33\lib

问题 In Python I would like to divide two numbers and if the answer is not an integer I want the number to be rounded up to the number above. For example 100/30 not to give 33.3 but to give 4. Can anyone suggest how to do this? Thanks. 回答1: you can use the ceil function in math library that python has, but also you can take a look why in a logical sense a = int(100/3) # this will round down to 3 b = 100/3 # b = 33.333333333333336, a and b are not equal so we can generalize into the following def