Python processing strings: Adding numbers in a string to sum

Computes the and of all numbers in a string, with a combination of numbers and letters
If consecutive numbers appear, follow one number
The specific explanation is in the line of code:

defsum_str (str1): Len1=len (STR1)#first assign the length of the string str1 to Len1sum = N = 0#create an empty variable with a value of 0 sun #建立一个值为0的空变量n     forIinchRange (LEN1):#use I to traverse the length of a string        if<= Ord (Str1[i]) <= 57:#determines whether the ASCII code of a character is within the range of the digital ASCII valuen = n * 10#N *=n = Int (str1[i]) + N#n + = Int (str1[i])        Else: Sum= n + sum#sum + = nn =0#the above 6 lines of code means starting with the 0 subscript, traversing the string, if it is a number, using n plus its number,        #The execution logic is, meet a number, with N Plus, if the next or the number, the previous number by 10 plus this number, sequentially loop        #For example: continuous digital DF123ASD = ((1*10+2) *10) +3        #if it is not a number, add the n value to the variable sum, save it, and re-assign N to 0 to enter the For loop again (Sun only appears when it meets the letter, collecting the value of the number before the number)        #next time you hit the number (meet if condition), the logic below the loop (if) conditionsum = n +sumPrint(sum) str1="b532x2x3c4b5"sum_str (str1) #调用函数

Operation Result:

Python processing strings: Adding numbers in a string to sum