Why does this print everything on one line? I want each list to print one it's own line separat-CodePudding

lcolhead = ['ID', 'Name', 'Email']
lrow1 = [1, 'Jane Doe', '[email protected]']
lrow2 = [2, 'Jake Doe', '[email protected]']
lrow3 = [3, 'Jane Fox', '[email protected]']

ltable1 = [lcolhead, lrow1, lrow2, lrow3]

for row  in ltable1:
    for item in row:
        print(item, end=' | ')

output is each value on a single line separated by ' | '

ID | Name | Email | 1 | Jane Doe | [email protected] | 2 | John Doe | [email protected]...

I want it to print:

ID | Name | Email |
1 | Jane Doe | [email protected] |
2 | John Doe | [email protected] |

storing the column headers as a list as well as the row values in a list of lists but cannot figure out why it prints everything to a single line.

CodePudding user response：

Using your solution, adding a simple print() statement in the outer loop fixes it:

lcolhead = ['ID', 'Name', 'Email']
lrow1 = [1, 'Jane Doe', '[email protected]']
lrow2 = [2, 'Jake Doe', '[email protected]']
lrow3 = [3, 'Jane Fox', '[email protected]']

ltable1 = [lcolhead, lrow1, lrow2, lrow3]

for row in ltable1:
    for item in row:
        print(item, end=' | ')
    print()  # printing nothing, followed by default end='\n'

To other programmers that may be a confusing use of end though, so perhaps a better solution would be this:

for row in ltable1:
    print(' | '.join(map(str, row))   ' | ')

This turns everything in row into a string with map(str, ..) and then joins those strings together with |, adding a ' | ' at the end as well, for the same result (because no end is specified, it defaults to \n here).

The result in either case:

ID | Name | Email | 
1 | Jane Doe | [email protected] | 
2 | Jake Doe | [email protected] | 
3 | Jane Fox | [email protected] |

Of course, if you don't even need that dangling ' | ', you can just:

for row in ltable1:
    print(' | '.join(map(str, row)))

CodePudding user response：

for row  in ltable1:
    print( " | ".join( row)   " | ")

But I'm questioning the utility of the last vertical bar.