Write a program to check if a string has at least one letter and one number - Python

[ Write a program to check if a string has at least one letter and one number ]

write a program to check if a string has at least one letter and one number

def checkString(str): 

    flag_l = False
    flag_n = False

    for i in str: 

        # if string has letter 
        if i.isalpha(): 
            flag_l = True

        # if string has number 
        if i.isdigit(): 
            flag_n = True

    return flag_l and flag_n 


# driver code 
print(checkString('helloworld')) 
print(checkString('helloworld2020'))

write a program extract least frequency element

from collections import defaultdict 
test_list = [1, 3, 4, 5, 1, 3, 5] 

# printing original list  
print("The original list : " + str(test_list)) 

# Extract least frequency element 
res = defaultdict(int) 
for ele in test_list: 
   res[ele] += 1 
min_occ = 9999
for ele in res: 
    if min_occ > res[ele]: 
        min_occ = res[ele] 
        tar_ele = ele 

# printing result 
print("The minimum occurring element is : " + str(tar_ele)) 

write a program to check 2 lists and find if any element is common

def common_data(list1, list2): 
    result = False

    for x in list1: 

        # traverse in the 2nd list 
        for y in list2: 

            # if one common 
            if x == y: 
                result = True
                return result  

    return result 

# driver code 
a = [1, 2, 3, 4, 5] 
b = [5, 6, 7, 8, 9] 
print(common_data(a, b)) 

a = [1, 2, 3, 4, 5] 
b = [6, 7, 8, 9] 
print(common_data(a, b)) 

write a program to find area of a triangle

a = float(input('Enter first side: '))  
b = float(input('Enter second side: '))  
c = float(input('Enter third side: '))  

s = (a + b + c) / 2  

area = (s*(s-a)*(s-b)*(s-c)) ** 0.5  
print('The area of the triangle is %0.2f' %area)   

write a program to swap two variables

x = input('Enter value of x: ')  
y = input('Enter value of y: ')  

temp = x  
x = y  
y = temp  

print('The value of x after swapping: {}'.format(x))  
print('The value of y after swapping: {}'.format(y)) 

write a program to convert kilometers to miles

kilometers = float(input('How many kilometers?: '))  
conv_fac = 0.621371  
miles = kilometers * conv_fac  
print('%0.3f kilometers is equal to %0.3f miles' %(kilometers,miles))  

write a program to convert Celsius to Fahrenheit

celsius = float(input('Enter temperature in Celsius: '))  
fahrenheit = (celsius * 1.8) + 32  
print('%0.1f  Celsius is equal to %0.1f degree Fahrenheit'%(celsius,fahrenheit))  

write a program to display the calender

import calendar  
yy = int(input("Enter year: "))  
mm = int(input("Enter month: "))  

print(calendar.month(yy,mm))  

write a program to check if the year is a leap year

year = int(input("Enter a year: "))  
if (year % 4) == 0:  
   if (year % 100) == 0:  
       if (year % 400) == 0:  
           print("{0} is a leap year".format(year))  
       else:  
           print("{0} is not a leap year".format(year))  
   else:  
       print("{0} is a leap year".format(year))  
else:  
   print("{0} is not a leap year".format(year))