python-3.8

问题 On Python3.8, I'm trying to use pathlib to concatenate a string to a UNC path that's on a remote computer's C drive. It's weirdly inconsistent. For example: >>> remote = Path("\\\\remote\\", "C$\\Some\\Path") >>> remote WindowsPath('//remote//C$/Some/Path') >>> remote2 = Path(remote, "More") >>> remote2 WindowsPath('/remote/C$/Some/Path/More') Notice how the initial // is turned into / ? Put the initial path in one line though, and everything is fine: >>> remote = Path("\\\\remote\\C$\\Some\

问题 One day ago I did a fresh installation of Raspberry Pi OS Buster and after that I installed Python3.8 in my Raspberry pi following this tutorial. https://installvirtual.com/how-to-install-python-3-8-on-raspberry-pi-raspbian/ I added python alias to bashrc. echo "alias python=/usr/local/bin/python3.8" >> ~/.bashrc source ~/.bashrc Now typing python in terminal showing Python 3.8.0 (default, Jun 8 2020, 13:17:16) But when I run python3 it's showing Python Python 3.7.3 I added python3 alias

问题 I've read PEP 572 about assignment expressions and I found this code to be a clear example where I could use it: while line := fp.readline(): do_stuff(line) But I am confused, from what I read, it is supposed to work just like normal assignment but return the value. But it doesn't appear to work like that: >>> w:=1 File "<stdin>", line 1 w:=1 ^ SyntaxError: invalid syntax Now after tinkering with it I realised the following works: >>> (w:=1) 1 But it feels so unpythonic. It is the only

问题 thank you for reading my question I have to plot my data like that. When I plot my data I am having an output like this. Code for reading the data from the file and plotting is below #!/usr/bin/env python3.8 import matplotlib.pyplot as plt import numpy as np with open('data.txt','r') as file2: y= [line.rstrip('\n') for line in file2] notf2=y[2:] z=[a.rstrip(' ') for a in notf2] x_data=[] y_data=[] for j in range(0, len(z)): x_data += [z[j][:3]] y_data += [z[j][5:]] x__data=[] y__data=[] for k

问题 ================================================================================== TURICREATE ERROR If you see this message, pip install did not find an available binary package for your system. Supported Platforms: * macOS 10.12+ x86_64. * Linux x86_64 (including WSL on Windows 10). Support Python Versions: * 2.7 * 3.5 * 3.6 * 3.7 Another possible cause of this error is an outdated pip version. Try: `pip install -U pip` ========================================================================

问题 ================================================================================== TURICREATE ERROR If you see this message, pip install did not find an available binary package for your system. Supported Platforms: * macOS 10.12+ x86_64. * Linux x86_64 (including WSL on Windows 10). Support Python Versions: * 2.7 * 3.5 * 3.6 * 3.7 Another possible cause of this error is an outdated pip version. Try: `pip install -U pip` ========================================================================

问题 ================================================================================== TURICREATE ERROR If you see this message, pip install did not find an available binary package for your system. Supported Platforms: * macOS 10.12+ x86_64. * Linux x86_64 (including WSL on Windows 10). Support Python Versions: * 2.7 * 3.5 * 3.6 * 3.7 Another possible cause of this error is an outdated pip version. Try: `pip install -U pip` ========================================================================

问题 So I have this program which requests a file from the web and the user can download it. I am using urllib.request and tkinter for my program. The problem is that when the user hits the 'Download' button there is no pause or cancel until the file gets downloaded and the program freezes too. I really want to create a pause or a cancel button, but I do not know how and I want to eliminate the freezing of the program. Should I use another library like 'requests'? Or should I try threading? Can

问题 I created a combobox to show a list of values out of a sqlite database. If I sent the values to the combobox, the list will shown. The problem is, that the field will not filled with the first value and stay empty until I select on item of out of the drop menu. Could I set a value to be displayed directly? Here my code snippet: self.e_business = ttk.Combobox(address_frame, width = 40) self.e_business.grid(row=3, column=1, columnspan=2, padx=(5,20), pady=(15,5), sticky='WE') The function which

问题 Trying to build a simple wxpython app using py2app and using pyenv. I created a virtual environment from whence I run the application and build with py2app. It fails during building on a "no such file or directory" error. copying file /Users/humberto.a.sanchez.ii/.pyenv/versions/3.8.5/Resources/Python.app/Contents/MacOS/Python -> /Users/humberto.a.sanchez.ii/PycharmProjects/gittodoistclone/dist/PyGitIssueClone.app/Contents/MacOS/python error: [Errno 2] /Users/humberto.a.sanchez.ii/.pyenv