Write a program to print Maximum frequency character in String - Python

[ Write a program to print Maximum frequency character in String ]

Write a program to print Maximum frequency character in String

# initializing string  
test_str = "Helloworld"

print ("The original string is : " + test_str) 

all_freq = {} 
for i in test_str: 
    if i in all_freq: 
        all_freq[i] += 1
    else: 
        all_freq[i] = 1
res = max(all_freq, key = all_freq.get)  

print ("The maximum of all characters in Helloworld is : " + str(res)) 

Write a program to check if a string contains any special character

import re 
def run(string): 

    regex = re.compile('[@_!#$%^&*()<>?/\|}{~:]') 

    if(regex.search(string) == None): 
        print("String is accepted") 

    else: 
        print("String is not accepted.") 


if __name__ == '__main__' : 

    # Enter the string 
    string = "Hello@World"

    # calling run function  
    run(string) 

Write a program to check if a string is binary or not

def check(string) : 
    p = set(string) 
    s = {'0', '1'} 
    if s == p or p == {'0'} or p == {'1'}: 
        print("Yes") 
    else : 
        print("No") 

# driver code 
if __name__ == "__main__" : 

    string = "101010000111"
    check(string) 

Write a program to check whether a given string is Heterogram or not

def heterogram(input): 

     alphabets = [ ch for ch in input if ( ord(ch) >= ord('a') and ord(ch) <= ord('z') )] 

     if len(set(alphabets))==len(alphabets): 
         print ('Yes') 
     else: 
         print ('No') 

# Driver program 
if __name__ == "__main__": 
    input = 'Hello World'
    heterogram(input) 

write a program to check whether a given key already exists in a dictionary.

def checkKey(dict, key): 

    if key in dict.keys(): 
        print("Present, ", end =" ") 
        print("value =", dict[key]) 
    else: 
        print("Not present") 

# Driver Code 
dict = {'a': 100, 'b':200, 'c':300} 

key = 'b'
checkKey(dict, key) 

key = 'w'
checkKey(dict, key) 

write a program to check whether the string is a palindrome or not

def isPalindrome(s):
    return s == s[::-1]
s = "malayalam"
ans = isPalindrome(s)

if ans:
    print("Yes")
else:
    print("No")