python-2.x

问题 It seems import Queue Queue.Queue().get(timeout=10) is keyboard interruptible (ctrl-c) whereas import Queue Queue.Queue().get() is not. I could always create a loop; import Queue q = Queue() while True: try: q.get(timeout=1000) except Queue.Empty: pass but this seems like a strange thing to do. So, is there a way of getting an indefinitely waiting but keyboard interruptible Queue.get()? 回答1: Queue objects have this behavior because they lock using Condition objects form the threading module.

问题 It seems import Queue Queue.Queue().get(timeout=10) is keyboard interruptible (ctrl-c) whereas import Queue Queue.Queue().get() is not. I could always create a loop; import Queue q = Queue() while True: try: q.get(timeout=1000) except Queue.Empty: pass but this seems like a strange thing to do. So, is there a way of getting an indefinitely waiting but keyboard interruptible Queue.get()? 回答1: Queue objects have this behavior because they lock using Condition objects form the threading module.

问题 It seems import Queue Queue.Queue().get(timeout=10) is keyboard interruptible (ctrl-c) whereas import Queue Queue.Queue().get() is not. I could always create a loop; import Queue q = Queue() while True: try: q.get(timeout=1000) except Queue.Empty: pass but this seems like a strange thing to do. So, is there a way of getting an indefinitely waiting but keyboard interruptible Queue.get()? 回答1: Queue objects have this behavior because they lock using Condition objects form the threading module.

问题 I'm learning python and had a quick question. I have to write a code to find the cube root, which I've done. I want to give the user the option of calculating another cube root, or quitting. Here's what I have come up with: x = int(raw_input('Enter an integer: ')) ## start guessing with 0 ans = 0 while ans*ans*ans < abs(x): ans = ans + 1 print 'current guess =', ans print 'last guess = ', ans print 'ans*ans*ans = ', ans*ans*ans ##if its a perfect cube if ans*ans*ans == abs(x): ## perfect, but

问题 I'm creating yaml files from csv's that have a lot of unicode characters in them but I can't seem to get it to dump the unicode without it giving me a Decode Error. I'm using the ruamel.yaml library. UnicodeDecodeError: 'ascii' codec can't decode byte 0xc2 in position 11: ordinal not in range(128) I've tried parsing strings, unicode strings, encoding with "utf-8" nothing seems to work. I've seen a lot of examples that show adding a representer to solve the issue but they all seem to be using

问题 My round function does not work in linux python 2.6.6, whereas it works fine in Windows 3.4.2 after using the following type of code: Array[i] = round(math.e ** AnotherArray[i], 4) v.3.4.2: 0.0025999999999999999 => 0.0026 v.2.6.6: 0.0025999999999999999 => 0.0025999999999999999 回答1: They both work the same, but Python 2.7 and up will round floating point numbers when printing their repr esentations , in order to not confuse users by the (language- and machine-independent) limitations of

问题 this code works fine when I put the path of the file myself. but when I want to get it from users raw_input() it doesn't work. what can I do? import string import random print "enter number between 6 and 20" n = raw_input() print "enter pathway of file" p = raw_input() print "creating a new text file" new_file = open(p, "w") #the error on this line m = int(n) print random.choice(string.ascii_lowercase) for i in range(0,m): for j in range(0,m): new_file.write(random.choice(string.ascii

问题 I am wondering seriously about the effects of cv2.imwrite() function of OpenCV. I noticed that when I read pictures with cv2.imread() and save them again with cv2.imwrite() function, their quality is not the same any more for the human eyes. I ask you how can I keep the quality of the image the same as the original after saving it using cv2.imwrite() function. I ask this question because I have really a serious issue in a larger program and when I checked the quality of the pictures saved by

问题 I am wondering seriously about the effects of cv2.imwrite() function of OpenCV. I noticed that when I read pictures with cv2.imread() and save them again with cv2.imwrite() function, their quality is not the same any more for the human eyes. I ask you how can I keep the quality of the image the same as the original after saving it using cv2.imwrite() function. I ask this question because I have really a serious issue in a larger program and when I checked the quality of the pictures saved by

问题 Is there a way to send a login packet to minecraft server from python? Here is what i have right now: import socket client = socket.socket(socket.AF_INET, socket.SOCK_STREAM) addr = ("localhost", 25565) client.connect(addr) client.sendall(chr(0x02)) client.sendall(chr(0xFD)) client.sendall(chr(0xCD)) # After sending this line server still don't kick me client.sendall(chr(0x06)+str(117)+str(70)+str(-46)) # And now server kicks me :-( client.sendall(chr(0x03)+str("Hello World")) print client