Arranging a List

sort() and reverse() methods

#Termux

@python_pioneers

Next➡ : Mathematical Operations on List (using List Methods)

Mathematical Operations on List (using List Methods)

አንድ list ላይ mathematical operations ለማካሄድ የምንጠቀማቸው ብዙ አይነት methods እንድሁም ብዙ እይነት functions አሉ።

Let's see them one by one...

1. len()

ይሄንን len() function የምንጠቀመው በአንድ listውስጥ ያሉትን elements ብዛት(የlistኡን length) ለማወቅ ስንፈልግ ነው።

Syntax: 
len(list_name)

ለምሳሌ :

Items = ["rubber", "pencil", "book", "pen"]
length = len(Items)

print(length)

#Output : 4

2. count() method

ይሄንን method ደግሞ የምንጠቀመው በአንድ list ውስጥ ያለ የሆነ specific element ምን ያህል occur እንዳረገ ለማወቅ ስንፈልግ ነው።

Syntax :
list_name.count(element)

ለምሳሌ :

alps = ["a", "e", "g", "a", "f", "g", "a"]

occurrence_of_a = alps.count("a")

print(occurrence_of_a)

#Output : 3

3. max()

max() function በአንድ list ውስጥ ትልቁን element return ያረጋል።

Syntax :
max(list_name)

4. min()

min() function ደግሞ በተቃራኒው የአንድን list ትንሹን element return ያረግልናል፣

Syntax :
min(list_name)

max() እና min() function በምሳሌ እንመልከት።

nums = [5, 90, 34, 65, 23, 7, 10]

print(max(nums)) #Output : 90

print(min(nums)) #Output : 5

...

#MathsOpOnLists
#Lists

@python_pioneers

1. What is the result of the following operation?

list1 = [1, 2, 3]
list2 = [4, 5, 6]
result = list1 + list2

- 😁) [1, 2, 3, 4, 5, 6]

-😭) [5, 7, 9]

-😢) [(1, 4), (2, 5), (3, 6)]

-🤓) None of the above

2. What does the following Python code return?

list1 = [1, 2, 3]
result = list1 * 2

- 😁) [2, 4, 6]

-😭) [1, 2, 3, 1, 2, 3]

-😢) [1, 1, 2, 2, 3, 3]

-🤓) None of the above

Nice question

In case of lists containing strings, when we use max() and min() function, they return the maximum or minimum element based on lexicographical order

ለምሳሌ:

"name" has higher lexicographic order than "age", so if we use max() for a list containing only the two, the function returns "name"

But also there's something called key, in which you specify the criteria you want to compare by

Is this helpful 👆

3. What will be the output of the following code?

numbers = [5, 10, 15, 20, 25]
print(max(numbers))

😁) 5
😭) 10
😢) 25
🤓) 20

4. What will be the output of the following code?

numbers = [3, 7, 2, 9, 4]
print(len(numbers))

😁) 9
😭) 4
😢) 3
🤓) 5

5. What will be the output of the following code?

words = ["apple", "banana", "orange", "kiwi"]
print(max(words))

😁) "apple"
😭) "banana"
😢) "orange"
🤓) "kiwi"

6. What will be the output of the following code?

words = ["cat", "sheep", "elephant", "bird"]
print(min(words, key=len))

😁) "cat"
😭) "bird"
😢) "sheep"
🤓) "elephant"