Python Program Doubt

Question

# Fibonacci series:
# the sum of two elements defines the next
a, b = 0, 1
while b < 10:
print(b)
a, b = b, a+b

What is the meaning of (a, b = b, a+b)?
Please explain it in detail.

Answer 1

In Python you can set values to multiple variables in one line, separated by commas, to each value respectively.

In this case, variable a becomes the value of b, and variable b then becomes the original value of a added to the value of b.

Answer 2

The Fibonacci Series requires a and b, combined to make the next value of b.

It is a simplified version of writing:
a_original = a
a = b
b = b + a_original

For Example:
a = 0
b = 1
a_original = a #0
a = b #1
b = a_original + b #0 + 1 or 1

The simplified version prevents you from needing the temporary a_original variable, and sets the variables for the next values in the sequence:
a = 0
b = 1
a, b = b, a+b
or
a, b = 1, 0+1
#a==1
#b==1

Answer 3

Could you be more precise as I could not understand till now ?