I have written a function that counts the freq of characters in a file. The function works as intended, however, I would like to print the dictionary alphabetically by key. How do I do this the simplest way in Python.
Here is my function:
def characters(textfile):
    textfile=open(textfile)         
    characters={} 
    for line in textfile:
        for char in line:
            if char in characters:
                characters[char]+=1
            else:
                characters[char]=1
    print(characters)  
 
    