python-3.4

问题 system Windows 8.1 Python 3.4 Repeatedly get FileNotFound Errno2 , attempting to copy all files in a directory. import os import shutil source = os.listdir("C:\\Users\\Chess\\events\\") for file in source : shutil.copy(file, "E:\\events\\") yields FileNotFoundError : [Errno2] No such file or directory 'aerofl03.pgn'. Although 'aerofl03.pgn' is first in the source list ['aerofl03.pgn', ...] . Same result if a line is added: for file in source : if file.endswith('.pgn') : shutil.copy(file, "E:\

问题 I came across bizarre eval behavior in Python 3 - local variables aren't picked up when eval is called in a list comprehension. def apply_op(): x, y, z = [0.5, 0.25, 0.75] op = "x,y,z" return [eval(o) for o in op.split(",")] print(apply_op()) It errors in Python 3: ▶ python --version Python 3.4.3 ▶ python eval.py Traceback (most recent call last): File "eval.py", line 7, in <module> print(apply_op()) File "eval.py", line 5, in apply_op return [eval(o) % 1 for o in op.split(",")] File "eval.py

问题 Given indices with shape [batch_size, sequence_len] , updates with shape [batch_size, sequence_len, sampled_size] , to_shape with shape [batch_size, sequence_len, vocab_size] , where vocab_size >> sampled_size , I'd like to use tf.scatter to map the updates to a huge tensor with to_shape , such that to_shape[bs, indices[bs, sz]] = updates[bs, sz] . That is, I'd like to map the updates to to_shape row by row. Please note that sequence_len and sampled_size are scalar tensors, while others are

问题 Given indices with shape [batch_size, sequence_len] , updates with shape [batch_size, sequence_len, sampled_size] , to_shape with shape [batch_size, sequence_len, vocab_size] , where vocab_size >> sampled_size , I'd like to use tf.scatter to map the updates to a huge tensor with to_shape , such that to_shape[bs, indices[bs, sz]] = updates[bs, sz] . That is, I'd like to map the updates to to_shape row by row. Please note that sequence_len and sampled_size are scalar tensors, while others are

问题 I have tried locating the submit button by id and xpath but none of them worked and checked in the page source ,the id is same.I have no idea why this is happening even though I am giving the correct Id or xpath URL : https://moodle.niituniversity.in/moodle/login/index.php from pyvirtualdisplay import Display from selenium import webdriver from selenium.webdriver.common.keys import Keys display = Display(visible=0, size=(1024, 768)) display.start() driver = webdriver.Firefox() #driver.set

问题 I'm trying to run a program without cmd window pop-up when I double click it or when I make it exe. So I wanted to save it as .pyw extension but when I double click to script, shell can't run it. It says I need to select the program to run it or search online. How can I fix this? Windows- Python 3.4 It was okay in 3.5 when I use .pyw extension. First time I see this problem. 回答1: I always have this problem whenever I reinstall Python. Very simple fix (at least on Windows): 1) Create a .pyw

问题 Is there a way to reliably fix the order of dictionary handling in Python 3, i.e. establish iteration over keys and values with a predictable order? For debugging purposes and to reproduce a failure that, supposedly, is based on dictionary access in python 3.3 and 3.4, I need to somehow make the iteration over dictionaries predictable. What I mean is I want to fix the way any iteration is performed at the start of the Python program. Such that starting the program many times, calls to dict

问题 I am unable to import sqlalchemy. I searched and found few solutions like installing flask or flask_sqlalchemy etc. None of these helped. What am I missing? 回答1: Sometimes, you need to restart ipython for it to find freshly-installed modules. I believe this holds for modules that add to sys.path . As per Can I zip all the python standard libs and the python still able to import it? , site.main() should work, too. It, among other things, scans site-packages directories for .pth files and adds

问题 I am unable to import sqlalchemy. I searched and found few solutions like installing flask or flask_sqlalchemy etc. None of these helped. What am I missing? 回答1: Sometimes, you need to restart ipython for it to find freshly-installed modules. I believe this holds for modules that add to sys.path . As per Can I zip all the python standard libs and the python still able to import it? , site.main() should work, too. It, among other things, scans site-packages directories for .pth files and adds

问题 How can I use the following code to delete a selection from a listbox and removing it from the list the contains it also? The selections in the listbox are dictionaries which I store in a list. .................code.............................. self.frame_verDatabase = Listbox(master, selectmode = EXTENDED) self.frame_verDatabase.bind("<<ListboxSelect>>", self.OnDouble) self.frame_verDatabase.insert(END, *Database.xoomDatabase) self.frame_verDatabase.pack() self.frame_verDatabase.config