Using a for loop to calculate the mean of a list of tuples in Python with map and zip-CodePudding

I was reading the answers about question in thread: https://stackoverflow.com/questions/68538651/using-a-for-loop-to-calculate-the-mean-of-a-list-of-tuples-in-python

Although the answers have helped me, I need to question how to finish what I was unsuccessfully trying.

My code is:

`vacc_counties = [ ("Pulaski", 42.7), ("Benton", 41.4), ("Fulton", 22.1), ("Miller", 9.6), ("Mississippi", 29.4), ("Scott County", 28.1), ]

data = map(list, zip(*vacc_counties))

for i in data:

print(i)`

I have obtained these 2 lists:

['Pulaski', 'Benton', 'Fulton', 'Miller', 'Mississippi', 'Scott County']

[42.7, 41.4, 22.1, 9.6, 29.4, 28.1]

But now my problem is that I don't know how to store them in 2 variables, in order to calculate the mean after that.

I have tried something like this, among lot of other things:

i0=[]

i1=[]

for i in data:

if i==0:

i0.append(i)

else:

i1.append(i)

print(i0)

print(i1)

But the result is strange -the first blank list, plus a list into other list[[..]], and for the second element of the tuples a list with the 2 lists inside, so I think I don't know what I'm doing:

[]

[['Pulaski', 'Benton', 'Fulton', 'Miller', 'Mississippi', 'Scott County']]

[]

[['Pulaski', 'Benton', 'Fulton', 'Miller', 'Mississippi', 'Scott County'], [42.7, 41.4, 22.1, 9.6, 29.4, 28.1]]

If somebody could finish this code to obtain the mean, and explain me why I have obtained this strange result, I would appreciate it because I'm really lost.

Thank you in advance.

CodePudding user response：

You can assign the results from map function direct to variables and use it for further calculations.

Try the below solution:

vacc_counties = [ ("Pulaski", 42.7), ("Benton", 41.4), ("Fulton", 22.1), ("Miller", 9.6), ("Mississippi", 29.4), ("Scott County", 28.1), ]

data = list(map(list, zip(*vacc_counties)))
cntryNames,cntryValues = data

print(cntryNames)
print(cntryValues)

Now after this you can apply your calculations on this list.