difference between ascii in python code example

Example 1: python ascii

>>> ord('a')
97
>>> chr(97)
'a'
>>> chr(ord('a') + 3)
'd'
>>>

Example 2: python ascii to string

# to convert ascii code to character 
# use "chr()" function with acsii value as parameter to function


asc = [x for x in range(65, 65+26)] 
#asc store ascii value form "A" to "Z"
string = ""
for i in asc:
  string += chr(i)
  
print(string) #converted list of ascii code to string