python-3.6

I have the following problem with my project, help me please! Here is the structure of my package: /pkg /pkg/__init__.py /pkg/sub1/__init__.py /pkg/sub2/__init__.py /pkg/sub1/foo1.py /pkg/sub2/foo2.py Here is implementation of foo1.py: from ..sub2 import foo2 def f(): print("Hello!") When I run foo1 I get error: ValueError: attempted relative import beyond top-level package . I can solve it doing the following adjustment: import sys import os sys.path.append(os.path.abspath(os.path.pardir)) from sub2 import foo2 def f(): print("Hello!") But I wonder if there is a way to do it without importing

So I was trying to redirect stdout for a some of the cells in my Jupyter Notebook to a file with this and then cancel it with this for the rest of the cells. The output from the first set of cells landed in the file like it was meant to. The second set of cells after the cancel command sys.stdout = sys.__stdout__ was giving no output, appearing to do nothing, but I later realised it was landing in the terminal where the notebook was launched. It works perfectly in the Python interpreter with exactly the same Python: (miniconda3-latest) cardamom@pegasus:~/Documents/project1 $ python Python 3.6

I'm trying repeat the rows of a dataframe. Here's my original data: pd.DataFrame([ {'col1': 1, 'col2': 11, 'col3': [1, 2] }, {'col1': 2, 'col2': 22, 'col3': [1, 2, 3] }, {'col1': 3, 'col2': 33, 'col3': [1] }, {'col1': 4, 'col2': 44, 'col3': [1, 2, 3, 4] }, ]) which gives me col1 col2 col3 0 1 11 [1, 2] 1 2 22 [1, 2, 3] 2 3 33 [1] 3 4 44 [1, 2, 3, 4] I'd like to repeat the rows depending on the length of the array in col3 i.e. I'd like to get a dataframe like this one. col1 col2 0 1 11 1 1 11 2 2 22 3 2 22 4 2 22 5 3 33 6 4 44 7 4 44 8 4 44 9 4 44 What's a good way accomplishing this? You can

I installed Python 3.6 on Ubuntu 16.04 by using Jonathon Fernyhough's PPA : sudo add-apt-repository ppa:jonathonf/python-3.6 sudo apt-get update sudo apt-get install python3.6 I made a string, using the new literal string interpolation, but I supplied an invalid format specifier. I not only got the expected ValueError: Invalid format specifier , but also the unexpected ModuleNotFoundError: No module named 'apt_pkg' . $ python3.6 Python 3.6.0 (default, Dec 29 2016, 21:40:36) [GCC 5.4.1 20161202] on linux Type "help", "copyright", "credits" or "license" for more information. >>> value = 4 * 20 >

This question already has an answer here: How can I print literal curly-brace characters in python string and also use .format on it? 10 answers I have a string in which I would like curly-brackets, but also take advantage of the f-strings feature. Is there some syntax that works for this? Here are two ways it does not work. I would like to include the literal text " {bar} " as part of the string. foo = "test" fstring = f"{foo} {bar}" NameError: name 'bar' is not defined fstring = f"{foo} \{bar\}" SyntaxError: f-string expression part cannot include a backslash Desired result: 'test {bar}'