python-3.x

问题 So I am new to connection pooling. I am trying to determine how to use a pool in order to speed up my query. I have a query that works, but I dont think I am using the pool correct. Here is the syntax, if you see anywhere I could be more efficient please let me know. try: db=mysql.connector.connect(poolname="mypool", pool_size=10, **config) cursor.execute(query1) df1=create_df(cursor) cursor.execute(query2) df2=create_df(cursor) cursor.execute(query3) df3=create_df(cursor) 回答1: Your question

问题 I'm at my wits end here... So I have a kivy app that runs fine from the interpreter and fine when built as a directory. But it doesn't seem to matter how I build it, the resulting exe always fails to find my main.kv file. My file structure is that I basically have images and a bunch of screens. main.py main.kv resources/image 1 /image 2 /kv_files/screen1 /screen2 I have been over all the similar question on SO including this one, and this one and this one. I think I have tried all of the

问题 Look at the following code, def expdate(date): _exp_date = datetime.strptime(date, "%m%y") >>> expdate('1268') 2068-12-01 00:00:00 >>> expdate('1269') 1969-12-01 00:00:00 Optionally how to actually overcome this and get 2070 ? I'll be checking only using 2 digits years. 回答1: Python depends on the platform’s C library, which generally doesn’t have year 2000 issues, since all dates and times are represented internally as seconds since the epoch. Functions accepting a struct_time generally

问题 I m trying to join two tables and inserting the data in a view in PostgreSQL. While i debug I can see my data but when i check my DB there is no creating of a view. ALso the is nothing as error and i cannot find what's missing. engine = create_engine(DATABASE_URI) view = Table('testing', MetaData()) session = get_db_session() result=session.query(Policy_table,Join_table).filter(Policy_table.name==Join_table.policy_name).all() session.commit() create_view = CreateView(view ,result) engine

问题 I'm struggling with my code to implement horizontal and vertical scrollbars to display the values of a dataframe. I have two frames/canvas, the first for the headers, the second for the values. So far, my code displays the dataframe but I can't finalize the scrollbars properly. Also, I would like my horizontal scrollbar to effect both canevas, so that my values and headers scroll together. But obviously the headers must not scroll with the vertical scrollbar (headers shall always remain

问题 I was working with a keylogger code in python 3.5. It records keystrokes with pynput in a txt file and also sends the keystrokes recorded via email with smtplib. The code works correctly as it should when it is a .py file but doesn't record keystrokes in a file nor sends them through email when converted into a .exe file with pyinstaller. Please help me find out what's causing this problem and fix it. Thank you for looking into this matter. Have a good day! I used the command pyinstaller - w

问题 Trying to run Octave on Mac. When I run the diagnose command sympref diagnose . I get that everything is configured fine: Symbolic package diagnostics ============================ Python and SymPy are needed for most features of the Symbolic package. The Python interpreter is currently: "/Library/Frameworks/Python.framework/Versions/3.7/bin/python3". Computers may have more than one Python interpreter installed. If you need to, you can select a different one using the PYTHON environment

问题 I am trying to do a dynamically updating plot in Matplotlib Python 3.x using Tkinter. It starts with displaying a file dialog for the user to select the .csv file. Here's the example of the .csv file: I want to plot each row then the plot is updated & plotting the next row. Here's what I currently have: plt.style.use('fivethirtyeight') xs =[] ys = [] csvFile = filedialog.askopenfile(mode='r', filetypes=(("CSV file", "*.csv"), ("All files", "*.*")), title="Select a CSV file") csvFile2 = pd

问题 I'm programming a Website with Authentification while using the Flask Framework. I've tried every solution that i found on the internet but nothing worked for me. My first idea was, that the Project Structure was corrupt. e.g. missing imports from other files. But thats not the problem i think. My models.py File: from flask_login import UserMixin, LoginManager from flaskapp import db, login_manager @login_manager.user_loader def get_user(user): try: return get_id(user) except: return None

问题 The below piece of code uses openCV module to identify lanes on road. I use the python 3.6 for coding (I use atom IDE for development. This info is being provided because stackoverflow isn't letting me post the info without unnecessary lines of info. so please ignore the comments in bracket) The code runs fine with a given sample video. But when I run it for another video it throws the following error: (base) D:\Self-Driving course\finding-lanes>RayanFindingLanes.py C:\Users\Tarun\Anaconda3