make a list from 0 to n python
a_list = list(range(0, n))
Here is what the above code is Doing:
1. We create a list of numbers from 0 to n-1.
2. We shuffle the list.
3. We take the first k elements of the list.
4. We sort the list.
a_list = list(range(0, n))
Here is what the above code is Doing:
1. We create a list of numbers from 0 to n-1.
2. We shuffle the list.
3. We take the first k elements of the list.
4. We sort the list.
math.exp(exponent) Here is what the above code is Doing: 1. We’re creating a function called sigmoid that takes in a number called z. 2. We’re creating a variable called exponent that is the exponential of z. 3. We’re creating a variable called result that is the exponential divided by 1 plus the exponential. 4. We’re…
class MyForm(forms.ModelForm): field_name = forms.ModelChoiceField(queryset=Position.objects.all(), empty_label=”(Select here)”) Here is what the above code is Doing: 1. Create a new form class called MyForm. 2. Create a new field called field_name. 3. Set the field_name field to be a ModelChoiceField. 4. Set the queryset for the field_name field to be all of the Position objects. 5….
For python 3.9 or old : install with link https://www.lfd.uci.edu/~gohlke/pythonlibs/#pyaudio find whl and install it with : pip install PyAudio-0.2.11-cp39-cp39m-win_amd64.whl Here is what the above code is Doing: 1. Importing the PyAudio and wave modules 2. Opening the audio stream 3. Initializing the recording 4. Recording the audio in chunks and append the chunks to…
#raise keyerror(key) from none os.environ # Move over while creating .env file first time you will get this error.To resolve this error. Open your .env file it’s contains key value pairs in it. if it contains space after Key then remove that space from it. Ex: DATABASE_URL =postgres://127.0.0.1:5432/my_db_name changed to(hear removed space after DATABASE_URL) DATABASE_URL=postgres://127.0.0.1:5432/my_db_name…
from threading import active_count active_count() Here is what the above code is Doing: 1. We import the threading module. 2. We create a function that prints a message and then sleeps for 5 seconds. 3. We create a thread object that runs the function we created in step 2. 4. We start the thread. 5….
# delete 10th, 11th, and 15th row of df, axis = 0 signify rows, inplace=True means changes directly going to apply to df. df.drop(labels=[10, 11, 15], axis=0, inplace=True) # or df = df.drop(labels=10, axis=0) Here is what the above code is Doing: 1. We’re creating a list of labels to delete. 2. We’re specifying that…