Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Python The Problem: For Loops

Andy McDonald
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Andy McDonald
Python Development Techdegree Graduate 13,801 Points

Outcome of a list is altered by indenting print command... why????

If I run the print statement within the for loop the list loads up correctly and is even correct when I run it globally. If I indent the print statement to a global command the list comes out with one thing in the list.

This makes no sense to me.

dblist = []

for dude in blist:
    dbtime = datetime.datetime.strptime(dude[1], '%d/%m')
    print(dude[1])
    ddude = dude
    ddude[1] = dbtime
    print(ddude)
    dblist.append(ddude)

print(dblist)

Here's my snapshot: https://w.trhou.se/odasr3qe37

1 Answer

Steven Parker
Steven Parker
229,005 Points

It's not clear how to replicate the issue. There are 3 files in the snapshot, yet none of them contain the code snippet shown above.

But the obvious issue around indentation is that an indented line would be considered to be inside the loop, where an un-indented one would be performed only once after the loop was over.