py-list of list

python - list of list
=====================

Questions
---------
1. list all words starts with "l" & "L"

for word in msg.split():

    if word.startswith('l') or word.startswith('L'):

        print(word)


Result:
-------
lake
like
link
Library.
linux
looking
libraries
low
level
Linux.
LIKE
link
low
level


--------------------------------------------------------------------------------------------


2. add the words starts with "l" & "L" into a list called mywords( do not add duplicate entries ).


mywords = []

for word in msg.split():

    if word.startswith("l") or word.startswith("L"):

        if word.lower().rstrip('.') not in mywords:

            mywords.append(word)

print(mywords)


Result:
-------
['lake', 'like', 'link', 'Library.', 'linux', 'looking', 'libraries', 'low', 'level']


--------------------------------------------------------------------------------------------


3 - print the total sum of each numbers.

numbers = [123 , 334 , 45 , 890 , 1234 , 45678 ]

for item in numbers:

    numbers_str = str(item)

    sum = 0

    for num in numbers_str:

        sum = sum + int(num)

    print("sum of numbers : ",sum)


Result:
-------
sum of numbers :  6
sum of numbers :  10
sum of numbers :  9
sum of numbers :  17
sum of numbers :  10
sum of numbers :  30


--------------------------------------------------------------------------------------------


4 - find the total sum of salaries.

employees = [ ["alex",50,35000] , ['sam',45,50000] , ["kevin",32,20000] ,[ "john",56,18000] ]

total_salary = 0

for item in employees:

    salary = item[2]

    total_salary = total_salary + salary

print(total_salary)


Result:
-------
123000


--------------------------------------------------------------------------------------------


5 - create a list of list from string.

s = "Kernel component code executes"

result = []

for item in s.split():

    length = len(item)

    result.append( [item,length] )

print(result)


Result:
-------
[['Kernel', 6], ['component', 9], ['code', 4], ['executes', 8]]


--------------------------------------------------------------------------------------------