for i in array[0:3]:
print(i)
Here is what the above code is Doing:
1. We’re creating an array of numbers from 0 to 9.
2. We’re printing the first three numbers in the array.
The output of the above code is:
0
1
2
>>> x = [1, 2, 20, 6, 210] >>> sorted(set(x), key=x.index) [1, 2, 20, 6, 210] Here is what the above code is Doing: 1. set(x) – Creates a set of unique elements from the list. 2. sorted(set(x), key=x.index) – Sorts the set by the list’s indices.
with open(filename) as f: mylist = f.read().splitlines() Here is what the above code is Doing: 1. We open the file and read it into a variable called f. 2. We then use the .read() method to read the entire contents of the file into a variable called contents. 3. We then use the .splitlines() method…
-80.435259246021 -23.831876011253 (S1 (S (NP (NP (DT The) (JJ old) (NN oak) (NN tree)) (PP (IN from) (NP (NNP India)))) (VP (VBD fell) (PRT (RP down))) (. .))) -79.703612178593 -24.505514522222 (S1 (S (NP (NP (DT The) (JJ old) (NN oak) (NN tree)) (PP (IN from) (NP (NNP India)))) (VP (VBD fell) (ADVP (RB down))) (….
There is no python3.exe file, that is why it fails. Try: py instead. py is just a launcher for python.exe. If you have more than one python versions installed on your machine (2.x, 3.x) you can specify what version of python to launch by py -2 or py -3 Here is what the above code…
from django.shortcuts import get_object_or_404 def my_view(request): obj = get_object_or_404(MyModel, pk=1) Here is what the above code is Doing: 1. It’s checking if the object exists in the database. 2. If the object exists, it returns the object. 3. If the object does not exist, it raises a Http404 exception. The get_object_or_404() function takes a Django…
actual = [0, 1, 2, 0, 3] predicted = [0.1, 1.3, 2.1, 0.5, 3.1] mse = sklearn.metrics.mean_squared_error(actual, predicted) rmse = math.sqrt(mse) print(rmse) Here is what the above code is Doing: 1. We’re using the sklearn.metrics module to calculate the mean squared error. 2. We’re using the math module to calculate the square root of the…