A very cool feature of Python is that it allows for simultaneous assignment. The syntax is as follows:
var_name1, var_name2 = value1, value2
This can be useful as a shortcut for assigning several values at once, like this:
smart_1, cute_1, funny_1, quiet_1 = "John","Paul","Ringo","George"
But simultaneous assignment is really useful in a scenario like the one shown below.
a=5 b=10 a=b b=a print("ATTEMPT 1. The Wrong Way.") print(a) print(b)
a=5 b=10 temp=a a=b b=temp print("ATTEMPT 2. A Non-Pythonic Way that Works.") print(a) print(b)
a=5 b=10 a,b = b,a print("ATTEMPT 3. The Python Way.") print(a) print(b)
The output should look like this:
The code demonstrates that simultaneous assignment really is simultaneous. The value for
a does not change before the value of
b gets the original value of
a, and we can switch the values without using an interim step of creating a temporary (and otherwise useless) variable.
Nat Dunn founded Webucator in 2003 to combine his passion for technical training with his business expertise and to help companies benefit from both. His previous experience was in sales, business and technical training, and management. Nat has an MBA from Harvard Business School and a BA in International Relations from Pomona College.