Notes

CPU Bound => Multi Processing
I/O Bound, Fast I/O, Limited Number of Connections => Multi Threading
I/O Bound, Slow I/O, Many connections => Asyncio

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Need FFmpeg in our PATH --> need FFmpeg as an exe
1. Edit the system environment vaRIABLES
2. Click on Environment Variables
3. System variables
    C:\XXX\AppData\Local\Programs\Python
    C:\XXX\AppData\Local\Programs\Python\Python39
    C:\XXX\AppData\Local\Programs\Python\Python39\Scripts <-- FFMPEG is placed here

Windows Key + R --> Type "appdata" to access the appdata folder



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Pass By Value --> A copy is made. The actual value DOES NOT CHANGE

def fun(a):
    a+=10
    print("Inside function call",a)

a=20
print("Before function call",a)
fun(a)
print("After function call",a)
Python
Copy

Output:

Before function call 20
Inside function call 30
After function call 20

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Pass By Reference --> The original is passed and the actual value is changed

def fun(a):
    a.append('i')
    print("Inside function call",a)

a=['H']
print("Before function call",a)
fun(a)
print("After function call",a)
Python
Copy

Output:

Before function call ['H']
Inside function call ['H', 'i']
After function call ['H', 'i']

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https://learnpython.com/blog/python-requirements-file/

# How to get project modules
pip freeze > requirements.txt

# How to install the modules from requirements.txt
pip install -r requirements.txt