day 4 python

## Occurence ot toal A's in word

word = "malayAlam"
c = 0
for item in word:
  if item in "aA":
    c = c + 1
print(c)

## List datatype

names = ['chris','prince','vysakh']
print(names[0])
print(names[1])
print(names[-1])

names = ['chris','prince','vysakh']
for item in names:
  print(item)

r = len(names)
print(r)

## Adding new item



names = ['chris','prince','vysakh']
print('before : ', names)
names.append('sam')
names.append('john')
names.append('sam')
names.append('kevnin')
names.append(10)
names.append(55.56)
print('after', names)

names = ['chris','prince','sam','kevin','sam']
r = 'nidhin' not in names
print(r)

names = ['chris', 'prince', 'vysakh', 'sam', 'john', 'sam', 'kevin', 10, 55.56 ]
r = names.count('sam')
print(r)

## Replace

names = ['chris','prince','nidhin']
names[0] = 'vysakh'
print(names)

## Empty list

persons = []

persons.append('sam')
persons.append('john')
persons.append('kevin')
print(persons)

## Extend

mylist = []
l1 = ['a','b']
l2 = ['c','d','e']
l3 = ['f','g']

mylist.extend(l1)
print(mylist)

mylist.extend(l2)
print(mylist)

mylist.extend(l3)
print(mylist)



## String in list

s = "Think about an OS like a car engine. An engine that can run its own"
words = s.split()
for word in words:
  print(word)

r = s.split()[-1]
print(r)

## Long sentence

s = """Linux began in 1991 as a personal project by Finnish student Linus Torvalds: to create a new free operating system kernel .
The resulting Linux kernel has mykernel been marked by constant growth throughout its history."""

word = s.split()
print(word)

word = s.lower().split().count('kernel')
print(word)

s = """Linux began in 1991 as a personal project by Finnish student Linus Torvalds: to create a new free operating system kernel .
The resulting Linux kernel has mykernel been marked by constant growth throughout its history."""

words = s.lower().split()
c = 0
for word in words:
  if word == 'kernel':
    c = c + 1
print(c)

# Task 2

## 1] find the sum of digits.

s = 'a1b2c3D4E4F5'
y = 0
for item in s:
  if item.isdigit():
    x = int(item)
    y = x + y
print("The sum of digits in the word is:", y)


## 2] print odd  digits.

s = '13245679134'
for odd in s:
  if int(odd) % 2 != 0:
    print(odd)


## 3]  Print even  digits.

s = '13245679134'
for even in s:
  if int(even) % 2 == 0:
    print(even)


## 4]  Print the words.

mylist = [ "sam" , "priyesh" , "1" , 2 , 3 , 4  , "prem" ]
for word in mylist:
    x = str(word)
    if x.isalpha():
      print(x)

## 5] Print the digits

mylist = [ "sam" , "priyesh" , "1" , "2" , 3 , 4 , "prem" ]
for digits in mylist:
  x = str(digits)
  if x.isdigit():
    print(x)

## 6] Find the sum of numbers.


mylist = [ "sam" , "priyesh" , "1" , "2" , 3 , 4, "prem" ]
z = 0
for num in mylist:
  x = str(num)
  if x.isdigit():
    y = int(x)
    z = y + z
print(z)


## 7] Print the even numbers.

mylist = [ "sam" , "priyesh" , "1" , "2" , 3 , 4 , "prem" ]
for even in mylist:
  x = str(even)
  if x.isdigit():
    if int(x) % 2 == 0:
      print(x)

## 8] Add numbers to nlist.

nlist = []
mylist = [ "sam" , "priyesh" , "1" , "2" , 3 , 4  , "prem" ]
for item in mylist:
  x = str(item)
  if x.isdigit():
    y = int(x)
    nlist.append(y)
print(nlist)

## 9] find the word starts with "k".

s = """The OS includes some common core components, like the GNU tools,
among others. These kick tools give the user a way to manage the resources
provided by the kernel, Kernel install additional  knee software, configure performance
and security Knife settings, and more. keep All of know these tools bundled together
make up the knee  keen functional kick operating system.  Because Linux is an open source
OS, combinations of kick software can vary between Linux distributions."""

s = s.replace(",","")
s = s.replace(".","")
s = s.lower().split()
for item in s:
    if item[0] == "k":
      print(item)


## 10] add words starts with "k" to klist.

klist = []
s = """The OS includes some common core components, like the GNU tools,
among others. These kick tools give the user a way to manage the resources
provided by the kernel, Kernel install additional  knee software, configure performance
and security Knife settings, and more. keep All of know these tools bundled together
make up the knee  keen functional kick operating system.  Because Linux is an open source
OS, combinations of kick software can vary between Linux distributions."""
s = s.replace(",","")
s = s.replace(".","")
s = s.lower().split()
for item in s:
    if item[0] == "k":
      klist.append(item)
print(klist)

## 11] add words starts with "k" to klist, avoid duplicate.

klist = []
s = """The OS includes some common core components, like the GNU tools,
among others. These kick tools give the user a way to manage the resources
provided by the kernel, Kernel install additional  knee software, configure performance
and security Knife settings, and more. keep All of know these tools bundled together
make up the knee  keen functional kick operating system.  Because Linux is an open source
OS, combinations of kick software can vary between Linux distributions."""
s = s.replace(",","")
s = s.replace(".","")
s = s.lower().split()
for item in s:
    if item.startswith("k"):
      if item not in klist:
        klist.append(item)
print(klist)