DEV Community: Poornima Ravi

Python Function Type Arguments

Poornima Ravi — Tue, 28 Jan 2025 17:33:04 +0000

""" Function Type Arguments"""
"""1. Positional Arguments

    - Values get assigned based on order/position of arguments passed""" 

def add(no1, no2, a, b):
    print(a,b,(no1+no2))
add(4,6,'Good','Morning')
add('Good','Morning',4,6)
print()


"""2. Keyword Arguments

    - Values are assigned by specifying the Fn. Argument's Keyword during the function call.
    - Positional Argument is followed by Keyword argument}"""

def kwargs(Str1, no1, List):
    print(Str1, no1)
    print(Str1, no1, List)
    print(List)
kwargs('Menu','e',[3,4,2,5])
kwargs(4,List = ['Apple', 'Mango', 'Melon'], no1 = 3)
print()

"""3. Default Arguments

    - Assigning a default value to the function parameter makes it a default argument for the function
    - if a postional/keyword arg value is passed to a default arg, the default gets overwritted with the value
    - Note : if the fn. has a default argument , it should be defined after all the positional arguments"""

def default_arg (user, job, salary = 10000):
    print(user, job, salary)
default_arg('Ken','Tech Engineer')
default_arg('Kenny','Field Engineer',5000)
default_arg('Ken_Z',45000)
default_arg('Ken_B','Tech Engineer',salary =9000)
print()

"""4. Variable Length Arguments

    - Can accept any number of positional arguments(*args)/Keyword Arguments(**args) passed to the function.
    - Positional Variable length Argument forms a tuple of all passed inputs defined under one variable
    - Keyword variable length Argument forms a Dictionary of all passed inputs defined under one variable"""

"""Positional Variable length arguments"""
def variable_length(def_argument= 'Test',*args, def_argument1='Yes'):
    print(type(args))
    print(args)
    print(args, def_argument,def_argument1)
    print(def_argument,args,def_argument1)


variable_length('My','Name','is','Henry','Ford','1995', True, 4.5)
print()
"""Keyword Variable length arguments"""

def keyword_variable_args(*args,**kw_args):
    print(type(args),type(kw_args))
    print(args)
    print(kw_args)

keyword_variable_args(4,3,'Time',True,Name='Bharat',Age = 30, Salary= 5000, Employer='TCS')
print()

"""5. Mixed Arguments

- A Function Arguments can have mix of all the argument types discussed above.
- In that case, Positional Arguments comes first , followed by keyword args, Default Arg / Keyword Variable length Arguments"""


def mixed_args(Num, *args,Str, Time = 'Fan', **Kargs):
    print(Num, Str, Time, args,Kargs)

mixed_args(4,5,4,5,3,7,'Key',5.6,Str='test',Name = 'Peacock')

Dictionary Tutorial

Poornima Ravi — Thu, 23 Jan 2025 19:38:28 +0000

#Task 1
players = {'virat':190, 'rohit':87, 'dhoni':95, 'bumrah':100, 'sachin':78, 'Rahul':160}
#Total Score
total_score = 0
for k, v in players.items():
    total_score = total_score + v
print(total_score)
print()

#Task 2
#Highest Scorer
highest = 0 
for k, v in players.items():
    if v > highest:
        highest = v
        high_k = k
print(high_k,highest)
print()


#Task 3: 
#Frequency of each letter in a given word: 
name = "delllaptop"
d = {}
for letter in name:
    d[letter] = d.get(letter,0) + 1
print(d)
print()

#Task 4 :
#Frequency of each word in a given sentence
#str = 'a rose is a rose is a rose'
str = 'Cat is a pet , Cat is on the table and Cat is sleeping'
i = 0 
previous_space = 0
dict = {}
while i < len(str):
    if str[i] == ' ':
        dict[str[previous_space:i]] = dict.get(str[previous_space:i],0)+1
        previous_space = i+1 
    i+=1
else:
    dict[str[previous_space:len(str)]] = dict.get(str[previous_space:len(str)],0)+1
print(dict)
print()


#Task 5 :
#Sort based on values: 
players = {'virat':190, 'rohit':87, 'dhoni':95, 'bumrah': 80, 'hardik':66, 'pant':34, 'sachin':98}
sorted_dict ={}
lowest = list(players.values())[0]
lowest_key = list(players.keys())[0]
i=0
length = int(len(players))
while i<length:
    for k, v in players.items():
        if v < lowest:
            lowest = v
            lowest_key = k
    sorted_dict[lowest_key] = lowest
    players = {k:v for k, v in players.items() if k!= lowest_key}
    if players != {}:
        lowest = list(players.values())[0]
        lowest_key = list(players.keys())[0]
    i+=1
print(sorted_dict)

Python List Tutorial Day2

Poornima Ravi — Fri, 10 Jan 2025 19:21:10 +0000

Transpose of Matrix
String Rotation
Matrix - sum of all rows, sum of all cols, max number in each row, min in each row
Matrix - sum of cols.,sum of leading diagonal

#1. Transpose of Matrix
l = [[10,12],
     [40,2],
     [60,3]]

Transpose = []
i = 0 
j = 0
#print(len(l[i]))
#print(len(l[j]))
while i < len(l[0]):
    list = []
    while j < len(l):
        list.append(l[j][i])
        j+=1
    Transpose.append(list)
    j=0    
    i+=1
print (l ,'Transpose:',Transpose, sep='\n')

#2. String Rotation

word = 'abcdef'
#num = 2 # --> cdefab
#num = 1 # --> bcdefa
#num = -2 # efabcd
#num = -1 # fabcde
num = int(input('Enter the Num:'))
num = num%len(word)
print(word[num:] + word[:num])

#3.Matrix -#List wise Total #List wise Maximum Value, #list wise minimum value

#List wise Total

student_marks = [[10,20,30],
                 [40,50,60],
                 [70,80,90]]

for marks_list in student_marks:
    sum = 0
    for mark in marks_list:
        sum = sum + mark
    print(sum, end=' ')
    print()

print("==============================================")


#List wise Maximum Value

student_marks = [[10,20,30],
                 [40,50,60],
                 [70,80,90]]

for marks_list in student_marks:
    max = 0
    for mark in marks_list:
        if mark > max:
            max = mark
    print('Max:',max, end=' ')
    print()

print("=============================================")

#list wise minimum value 


for marks_list in student_marks:
    min = marks_list[0]
    for mark in marks_list:
        if mark < min:
            min = mark
    print('Min:',min, end=' ')
    print()

 #4. Matrix - sum of cols,sum of leading diagonal
student_marks = [[10,20,30],
                 [40,50,60],
                 [70,80,90]]
#Sum of all columns 
#10+40+70
#20+50+80
#30+60+90
i = 0
j = 0
sum = 0
while j < len(student_marks):
    sum =0
    i=0
    while i < 3:
        sum = sum + student_marks[i][j]
        i+=1
    j+=1
    print('sum:',sum)


print('=======================================================')

#10+50+90
j = 0
sum = 0
while j < len(student_marks):
    sum = sum + student_marks[j][j]
    print(student_marks[j][j], end =' ')
    j+=1
print('sum:',sum)


print('=======================================================')
#30+50+70
i = 2
j = 0
sum = 0
while j < len(student_marks):
    sum = sum + student_marks[j][i]
    print(student_marks[j][i], end =' ')
    i-=1
    j+=1
print('sum:',sum)

Python List Tutorial

Poornima Ravi — Mon, 06 Jan 2025 17:19:16 +0000

#Problem 1: Print the following Output from the 2 given lists.
#10 5 10 7
#20 5 20 10 20 30
#30 5 30 10 
l1 = [10,20,30]
l2 = [5,10,30]
for value in l1:
    for elem in l2:
        if value != elem:
            print(value, elem, end=' ')
    print()


#Problem 2 : Missing Values

print('===================================================')
l1 = [10,20,30,40,50,70,80,100,120,130,170]
d = l1[1] - l1[0]
i=0
while i<(len(l1)-1):
    if (l1[i+1] - l1[i]) != d :
        print('Missing Value:',l1[i]+d)
    i+=1        


#Problem 3 : l1 = [5,0,10,3,2,7,6,5,4,9,1]
#Find pair of elements with a given sum =10
print('===================================================')
l1 = [5,0,10,3,2,7,6,5,4,9,1]
i=0
j=0
while i <  len(l1):
    while j < len(l1):
        if l1[i]+l1[j] == 10 and j != i:
            print('#Element:',i,'-',l1[i],'#Index[',j,']',l1[j])
        j+=1
    i+=1
    j=0

String Functions Examples

Poornima Ravi — Mon, 06 Jan 2025 13:36:07 +0000

#1. L Strip
#2. R Strip
#3. Replace a string in a statement with another string

# L Strip
Str = input("Enter the String:")

ord_space = ord(' ')
ord_tab = ord('\t')

i = 0 
right = 0
while i < len(Str):
    if ord(Str[i]) != ord_space and ord(Str[i]) != ord_tab:
        right = i
        break
    i+=1
Str = Str[right:]
print('LStrip String:',Str,end='#',sep='')


# R Strip

Str = input("Enter the String:")

ord_space = ord(' ')
ord_tab = ord('\t')

i = len(Str)-1
right = 0 

while i > 0:
    if ord(Str[i]) != ord_space and ord(Str[i]) != ord_tab:
        right = i
        break
    else:
        i-=1

Str = Str[:right+1]

print("#", Str, "#", sep='')


# Replace a string

#MSD --> Dhoni
#MSD is Former Indian Captain.  MSD is retired. MSD plays for CSK
sen = 'MSD is Former Indian Captain.  MSD is retired. MSD plays for CSK - MSD'
Key = 'MSD'
New_sen = ''
Key_Len = len(Key)
i=0
while i< len(sen):
       if Key == sen[i:i+Key_Len]:
            print('i',i)
            New_sen = New_sen + 'Dhoni'
            i+=Key_Len
       else:
            New_sen = New_sen + sen[i]
            i+=1
print(New_sen)

LCM & GCD of two numbers

Poornima Ravi — Mon, 30 Dec 2024 17:08:30 +0000

#LCM of two numbers
Num1 = int(input('Enter the Number 1:'))
Num2 = int(input('Enter the Number 2:'))
def evaluateN(Num1,Num2):
    if Num1>Num2:
        N= Num1
    else:
        N= Num2  
    return N
LCM = 1
i = 2
N = evaluateN(Num1,Num2)
if Num1>1 or Num2>1: 
    print(Num1,Num2)
    while i<=N:
        if Num1%i ==0 and Num2%i ==0:
            Num1 = Num1//i
            Num2 = Num2//i
            LCM = LCM * i
            print('i:',i, '|',Num1,Num2)
            i=2
        elif Num1%i ==0 and Num2%i !=0:
            Num1 = Num1//i
            LCM = LCM * i
            print('i:',i,'|', Num1,Num2)
            i=2
        elif Num1%i !=0 and Num2%i ==0:
            Num2 = Num2//i
            LCM = LCM * i
            print('i:',i,'|', Num1,Num2)
            i=2
        else:
            i+=1   
        N = evaluateN(Num1,Num2)   
    print('LCM :', LCM)
elif Num1==Num2:
    print('LCM :',LCM)
else:
    print('Enter Valid Num')



#GCD of two Numbers
Num1 = int(input('Enter the Number 1:'))
Num2 = int(input('Enter the Number 2:'))
def evaluateN(Num1,Num2):
    if Num1>Num2:
        N= Num1
    else:
        N= Num2  
    return N
GCD = 1
i = 2
N = evaluateN(Num1,Num2)
if Num1>1 or Num2>1: 
    print(Num1,Num2)
    while i<=N:
        if Num1%i ==0 and Num2%i ==0:
            Num1 = Num1//i
            Num2 = Num2//i
            GCD = GCD * i
            print('i:',i, '|',Num1,Num2)
            i=2
        else:
            i+=1   
        N = evaluateN(Num1,Num2)   
    print('GCD:', GCD)
elif Num1==Num2:
    print('GCD:',GCD)
else:
    print('Enter Valid Num')

Python While Loop Tutorial #Day3

Poornima Ravi — Sun, 29 Dec 2024 15:39:22 +0000

Tasks on While Loop:

Armstrong Number 351 3*3*3 5*5*5 1*1*1 27 + 125 + 1 153 -> not a Armstrong number
Neon Number A neon number is a number where the sum of digits of square of the number is equal to the number. 9 --> 81 --> 8+1 = 9 is a Neon Number
Factorial of a Number 4 = 4! = 4*3*2*1 = 24
Perfect Number Sum of Divisors of a Number(except the num itself) returns the same number -> Perfect number 6 - 1, 2, 3 -> 1+2+3 = 6
Prime Number
List of Prime Number
Emirp Number

#Armstrong

def Armstrong(count, Num):
    sum = 0
    i=0
    Out = Num
    while i<count:
        sum = sum + ((Num%10)**count)
        Num = Num//10
        i+=1
    if(sum == Out):
        print('Output:',sum,'Armstrong')
    else:
        print('Output:',sum,'Not a Armstrong')

Num = int(input('Enter the num:'))
count = 0
out = Num
while Num>=1:
    Num = Num//10
    count+=1
print('count :',count,' ')
Armstrong(count, out)


#Neon Number

Num = int(input("Enter the num:"))
Square = Num*Num
Neon = Num
Sum = 0
print(Square)
while Square >=1:
        Sum = Sum + (Square%10)
        Square = Square//10
if(Sum == Num):    
    print(Num,'Neon Number')
else:
    print(Num,'Not a Neon Number')



# Factorial of a Number

Num = int(input('Enter the Num:'))
Fact = 1
while Num>=1:
    Fact = Fact * Num
    Num = Num-1
print('Factorial:', Fact)

#Perfect Number

Num = int(input('Enter the number:'))
i = 1
sum = 0
while i<Num:
    if(Num%i == 0):
        sum = sum + i
    i+=1
if(sum == Num):
    print(Num,'is a perfect Number')
else:
    print(Num,'is not a perfect number')    

#Prime Number

Num = int(input('Enter the num:'))
i = 2
Prime = 1
if Num >1:
    while i<Num:
        if(Num%i == 0):
            Prime = 0
        i+=1
    if(Prime == 1):
        print(Num, 'is a prime number')
    else:
        print(Num, 'is not a prime number')
else:
    print('Enter a valid num')


#List of Prime Numbers
Num = int(input('Enter the num:'))
i = 2
Prime = 1
j= 2

if Num >1:
    while j <= Num:                    
        while i<j:
            if(j%i == 0):
                Prime = 0
            i+=1
        if(Prime == 1):
            print(j, 'is a prime number')
        Prime = 1
        i=2
        j+=1
else:
    print('Enter a valid num')


#Emirp Number
def isPrimeNumber(Num):
    i = 2
    Prime = 1
    if Num >1:
        while i<Num:
            if(Num%i == 0):
                Prime = 0
            i+=1
    return Prime
Num = int(input('Enter the num:'))
isPrime = isPrimeNumber(Num)
rev_Num = 0
if(isPrime == 1):
    rev = Num
    while Num >=1:
            rev_Num = rev_Num *10 + Num%10
            Num = Num//10
    print(rev_Num)
    isPrime = isPrimeNumber(rev_Num)
    if(isPrime ==1):
        print(rev,'is a Emirp Number')
    else:
        print(rev,'is not a Emirp Number')
else:
    print(Num,'is not a Emirp Number')

Python While Loop Examples

Poornima Ravi — Thu, 26 Dec 2024 19:33:18 +0000

#Tasks
# 2 4   6   8   10
#3  6   9   12  15
#1  3   5   7   9   2   4   6   8   10
#10 8   6   4   2
#9  7   5   3   1
#1  2   3   4   5   6   7   8   9   10
#1  RED BLUE RED 5 REDBLUE 7 RED BLUE RED


#Task 1
i=1
while i <= 10:
    if i%2 ==0:
        print(i, end =' ')
    i=i+1
print('')


#Task 2

i=1
while i <= 15:
    if i%3 ==0:
        print(i, end =' ')
    i=i+1
print('')

#Task 3 using 2 loops

i=1
while i<= 10:
    if i%2 != 0:
        print(i, end= ' ')
    i=i+1
i=1
while i<=10:
    if i%2 == 0:
        print(i, end =' ')
    i=i+1
print('')

#Task 3 using 1 loop

i=1
output = ''
while i<= 10:
    if i%2 != 0:
        print(i, end= ' ')
    elif i%2 == 0:
        output = output + str(i) + ' '
    i=i+1
else:
    print(output)

#Task 4

i=10
while i>=1:
    if i%2 == 0:
        print(i, end =' ')
    i=i-1
print('')

#Task 5

i=10
while i>=1:
    if i%2 != 0:
        print(i, end =' ')
    i=i-1
print('')

#Task 6 

i = 1
while i<=10:
    print(i, end =' ')
    i=i+1
print('')

#Task 7

i = 1
while i<=10:
    if i%2 == 0 and i%3 == 0:
        print('REDBLUE',end =' ')
    elif i%3 == 0:
        print('BLUE',end= ' ')
    elif i%2 == 0:
        print('RED',end =' ')
    else:
        print(i,end =' ')
    i=i+1
print('')

Python Day 1

Poornima Ravi — Tue, 24 Dec 2024 09:51:58 +0000

'''Sample Program to get 2 Number inputs '''
Num = input('Enter any Number :')
Num1 = input('Enter any Number :')
Total = Num + Num1 #-- --- Concatenates the values
print(Total)
print('Sum :',int(Num) + int(Num1))
print('Difference : ',int(Num) - int(Num1))
print('Multiplication : ',int(Num) * int(Num1))
print('Division : ',int(Num) / int(Num1))
print('Modulus : ',int(Num) % int(Num1))

To run python file:

Navigate to the file path in Terminal using cd 'Path'
Run python3 'File Name.py'

Python processess every input received from the user as String. To perform any operations on the input , we need to typecast the input to desired datatype as above example.