python-3.x

问题 I'm learning Tkinter at the moment. From my book, I get the following code for producing a simple vertical scrollbar: from tkinter import * # Import tkinter class ScrollText: def __init__(self): window = Tk() # Create a window window.title("Scroll Text Demo") # Set title frame1 = Frame(window) frame1.pack() scrollbar = Scrollbar(frame1) scrollbar.pack(side = RIGHT, fill = Y) text = Text(frame1, width = 40, height = 10, wrap = WORD, yscrollcommand = scrollbar.set) text.pack() scrollbar.config

问题 Has anyone worked with pyinstaller to create windows executables from python scripts? I'm trying to create an executable that loads a pickle file but not successful. import pickle filename='test.sav' try: model = pickle.load(open(filename, 'rb')) print('model loaded') except: print('An error occurred.') When run with python 3, it works and loads the model correctly but when run with the executable created by pyinstaller , it will through an exception. Help appreciated. 回答1: Im using kivy with

问题 I needed help regarding the subprocess module. This question might sound repeated, and I have seen a number of articles related to it in a number of ways. But even so I am unable to solve my problem. It goes as follows: I have a C program 2.c it's contents are as follows: #include<stdio.h> int main() { int a; scanf("%d",&a); while(1) { if(a==0) //Specific case for the first input { printf("%d\n",(a+1)); break; } scanf("%d",&a); printf("%d\n",a); } return 0; } I need to write a python script

问题 I read the docs and quite some stackoverflow posts, but did not find an explicit answer to my doubts. I think I understand what namespace packages are for. I am only interested in Python>=3.3 and the implicit namespace packages - folders without the __init__.py . Questions Are namespace packages supposed to contain only other packages, or modules (i.e. .py files) are also "allowed"? Are namespace packages supposed to be used only as "container" packages, or can they also be contained in

问题 I want to upgrade python's default version i.e /usr/bin/python in Linux. I have multiple python versions installed as /usr/bin/python2.7 /usr/bin/python3.3 However, python command still returns python2.7 # python Python 2.7 Type "help", "copyright", "credits" or "license" for more information. >>> Now, I have installed a module, which got installed in the default version 2.7 . That's why I can't use python3.3 script.py , as it returns error for missing module. How to update this default

问题 I'm trying to take 4k pictures using OpenCV, but when I change the resolution, the pictures just look resized instead of better quality. I'm using OpenCV version 4, Python 3.6, Logitech BRIO 4k webcam and Windows 10. If I don't change the camera resolution, it defaults to 640 x 480. If I change the resolution, the pictures just look blurred like they have been resized and not actually better quality. I can use the "Camera" app on Windows 10 to verify that the camera works with 4k resolution.

问题 Here is my code skeleton: def build_model(x, y): model = tf.keras.models.Sequential() model.add(tf.keras.layers.Dense(1, activation='relu')) model.compile(loss='mean_squared_error', optimizer='adam') model.fit(x, y) return model class MultiModel(object): def __init__(self, x1, y1, x2, y2): self.model1 = build_model(x1, y1) self.model2 = build_model(x2, y2) if __name__ == '__main__': # code that builds x1, x2, y1, y2 mm = MultiModel(x1, y1, x2, y2) # How to save mm ? The issue is I don't know

问题 This question already has answers here : How to iterate through two lists in parallel? (7 answers) Closed 4 years ago . Is it possible that with the use of list comprehension to iterate through two variables at the same time increasing the loop position in both at the same time. See example below: a = [1,2,3,4,5] b = [6,7,8,9,10] c = [i+j for i in a for j in b] # This works but the output is not what it would be expected. expected output is c = [7, 9, 11, 13, 15] (n'th element from a + n'th

问题 Let's assume I have 2 netCDF data files with data for the same region (like South America, Africa, etc) but the different grid sizes as 0.5 degrees x 0.5 degrees and 1.0 degrees x 1.0 degrees in another. I want to increase or decrease its grid size to a different value such as 0.25 x 0.25 or 1.0 x 1.0 so that I can use this easily for raster calculations and comparison, etc. Is there a method to do this using any bash script, CDO, etc. A sample data can be downloaded from here. https://www

问题 This question already has answers here : How to iterate through two lists in parallel? (7 answers) Closed 4 years ago . Is it possible that with the use of list comprehension to iterate through two variables at the same time increasing the loop position in both at the same time. See example below: a = [1,2,3,4,5] b = [6,7,8,9,10] c = [i+j for i in a for j in b] # This works but the output is not what it would be expected. expected output is c = [7, 9, 11, 13, 15] (n'th element from a + n'th