Append 3 digit sequence to lines in file

Question

Say I open a file and for each duplicate line appends a three-digit string. For example if in my file there are three instances of Nelson I want the output to read

Nelson001
Nelson002
Nelson003

As of now my code only outputs a single digit suffix (ie Nelson1). So how can I use a range of 001 - 00x, instead of 1-x?

Answer 1

if you have a loop for the appendix, check if it's less than ten, if so add two zeros as string to the appendix, if it's between ten and one hundred, add one zero.

Answer 2

Mario implementing your loop idea actually worked perfectly. Thanks for the suggestion, I can't imagine why I couldn't think of that.

Marvin, thanks for the suggestion, however it is a bit bulky for my little script.

Answer 3

#User001 User002 User003
usr_input=input("")

assignment_num=1
zeroes="00"

def num_assign(name):
global assignment_num
res=str(name) + "-" + zeroes + str(assignment_num)
assignment_num +=1
return res

while assignment_num<101:
print(num_assign(usr_input))
if assignment_num==10:
zeroes="0"
if assignment_num==100:
zeroes=""

Answer 4

Aaron, although Mario's suggestion is much simpler, Marvin's response allows for growth if the number of users is higher than 100. It is also scalable since you can change the behavior of the while loops if a number exceeds a certain threshold. Overall it is more robust if the code you are writing increases in complexity.

Answer 5

yes I can see the merit in Marvin's code and upvoted it for that reason, however since I'm pretty new to Python I'm not sure I would even know how to implement it correctly. The purpose of my script is purely for practice and basically parses my user name out of various log files on my computer. When I get more comfortable with the code and syntax, then I will try to use more pythonic functions and what not. Baby steps lol