TypeError: sequence item 0: expected string, int found
string.join connects elements inside list of strings, not ints. Use this generator expression instead :
python
pandas groupby sort within groups
What you want to do is actually again a groupby (on the result of the first groupby): sort and take the first three elements per group. Starting from the result of the first groupby: We group by the first level of the index: Then we want to sort (‘order’) each group and take the first … Read more
write multiple lines in a file in python
You’re confusing the braces. Do it like this: Or even better, use writelines:
How to crop an image in OpenCV using Python
It’s very simple. Use numpy slicing.
How to install discord.py rewrite?
Try using That should go to the rewrite branch of the discord.py repository and get the egg file to install.
How do I disable a Pylint warning?
pylint –generate-rcfile shows it like this: So it looks like your ~/.pylintrc should have the disable= line/s in it inside a section [MESSAGES CONTROL].
how to read json object in python
You should pass the file contents (i.e. a string) to json.loads(), not the file object itself. Try this: There’s also the json.load() function which accepts a file object and does the f.read() part for you under the hood.
Can’t get Python to import from a different folder
I believe you need to create a file called __init__.py in the Models directory so that python treats it as a module. Then you can do: You can include code in the __init__.py (for instance initialization code that a few different classes need) or leave it blank. But it must be there.
Beginner Python: Reading and writing to the same file
Updated Response: This seems like a bug specific to Windows – http://bugs.python.org/issue1521491. Quoting from the workaround explained at http://mail.python.org/pipermail/python-bugs-list/2005-August/029886.html the effect of mixing reads with writes on a file open for update is entirely undefined unless a file-positioning operation occurs between them (for example, a seek()). I can’t guess what you expect to happen, but seems most … Read more
Rotating a two-dimensional array in Python
Consider the following two-dimensional list: Lets break it down step by step: This list is passed into zip() using argument unpacking, so the zip call ends up being the equivalent of this: Hopefully the comments make it clear what zip does, it will group elements from each input iterable based on index, or in other words it groups the columns.