Using Python I want to print the elements of a list using for loop and also I want to generate a number for each item in the list. Something like an ID column next to the column containing the list's items.
Example:
lst = ['One', 'Two', 'Three']
for item in lst:
print(item)
Result:
One
Two
Three
What I would like to print:
1 One
2 Two
3 Three
Thank you!
You can try the built-in enumerate() method:
lst = ['One', 'Two', 'Three']
for i, item in enumerate(lst, 1):
print(i, item)
Output:
1 One
2 Two
3 Three
A potential problem here is when the digits start becoming different lengths, like:
lst = ['One', 'Two', 'Three', 'test', 'test', 'test', 'test', 'test', 'test', 'test', 'test', 'test', 'test']
Output:
1 One
2 Two
3 Three
4 test
5 test
6 test
7 test
8 test
9 test
10 test
11 test
12 test
13 test
where the starting point of each word doesn't align anymore. That can be fixed with the str.ljust() method:
lst = ['One', 'Two', 'Three', 'test', 'test', 'test', 'test', 'test', 'test', 'test', 'test', 'test', 'test']
for i, item in enumerate(lst, 1):
print(str(i).ljust(2), item)
Output:
1 One
2 Two
3 Three
4 test
5 test
6 test
7 test
8 test
9 test
10 test
11 test
12 test
13 test
You could use enumerate
lst = ['One', 'Two', 'Three']
for num,item in enumerate(lst,start=1):
print(num,item)
Output:
1 One
2 Two
3 Three