Updating a dictionary in python
Python has this feature built-in: >>> d = {‘b’: 4} >>> d.update({‘a’: 2}) >>> d {‘a’: 2, ‘b’: 4} Or given you’re not allowed to use dict.update: >>> d = dict(d.items() + {‘a’: 2}.items()) # doesn’t work in python 3
python-3.x
How to use concurrent.futures with timeouts?
As far as I can tell, TimeoutError is actually raised when you would expect it, and not after the task is finished. However, your program itself will keep on running until all running tasks have been completed. This is because currently executing tasks (in your case, probably all your submitted tasks, as your pool size … Read more
“WinError 2 The system cannot find the file specified” when trying to run Fortran
The command Popen expects a list of strings for non-shell calls and a string for shell calls. Call subprocess.Popen with shell=True: process = subprocess.Popen(command, stdout=tempFile, shell=True) Hopefully this solves your issue. This issue is listed here: https://bugs.python.org/issue17023
Drop a specific row in Pandas
df = pd.DataFrame([[‘Jhon’,15,’A’],[‘Anna’,19,’B’],[‘Paul’,25,’D’]]) df. columns = [‘Name’,’Age’,’Grade’] df Out[472]: Name Age Grade 0 Jhon 15 A 1 Anna 19 B 2 Paul 25 D You can get the index of your row: i = df[((df.Name == ‘jhon’) &( df.Age == 15) & (df.Grade == ‘A’))].index and then drop it: df.drop(i) Out[474]: Name Age Grade 1 … Read more
no module named distutils….but distutils installed?
Install setuptools in your machine pip install setuptools This solved my problem
Python 3 RuntimeError: super(): no arguments
Not 100% solution to the question, but same error. Posted with love for Googlers who have the same issue as me. Using Python 3, I got this error because I forgot to include self in the method. Simple thing, but sometimes the most simple things trip you up when you’re tired. class foo(object): def bar(*args): … Read more
AttributeError: module ‘pkgutil’ has no attribute ‘ImpImporter’. Did you mean: ‘zipimporter’?
If you can downgrade to Python 3.11 then you will probably not face any issue. If you must use only Python 3.12, then here is an attempt to solve the issue: AttributeError: module ‘pkgutil’ has no attribute ‘ImpImporter’. Did you mean: ‘zipimporter’? occurs due to using Python 3.12. Due to the removal of the long-deprecated … Read more
In Python 3, why do I get “TypeError: ‘zip’ object is not subscriptable” (or see a strange result instead of a list)?
In Python 2, zip returned a list. In Python 3, zip returns an iterable object. But you can make it into a list just by calling list, as in: list(zip(…)) In this case, that would be: list(zip(*ngram)) With a list, you can use indexing: items = list(zip(*ngram)) … items[0] etc. But if you only need … Read more
How to Import python package from another directory?
You can add the parent directory to PYTHONPATH, in order to achieve that, you can use OS depending path in the “module search path” which is listed in sys.path. So you can easily add the parent directory like following: import sys sys.path.insert(0, ‘..’) from instance import config Note that the previous code uses a relative … Read more
Specific type annotation for NumPy ndarray using mypy
What you are looking for is the numpy.typing.NDArray class: https://numpy.org/doc/stable/reference/typing.html#numpy.typing.NDArray numpy.typing.NDArray[A] is an alias for numpy.ndarray[Any, numpy.dtype[A]]: import numpy as np import numpy.typing as npt a: npt.NDArray[np.complex64] = np.zeros((3, 3), dtype=np.complex64) # reveal_type(a) # -> numpy.ndarray[Any, numpy.dtype[numpy.complexfloating[numpy.typing._32Bit, numpy.typing._32Bit]]] print(a) prints [[0.+0.j 0.+0.j 0.+0.j] [0.+0.j 0.+0.j 0.+0.j] [0.+0.j 0.+0.j 0.+0.j]] Note that even though you annotate … Read more