write to file within a for loop - python

Question

I am trying to iterate over JSON and write to a file as the information is retrieved. My code looks like this

for i in range(100):
    identifier = data ['items'][i]['id']
    out_file.write(identifier)

When I run it I get an indent error on the out_file.write line. I have seen so much code formatted in this way and I'm baffled as to why it isn't working for me. If I make the out_file line even with the for line, the program works, but only writes the last identifier in the loop. Any advice?

jh314 · Accepted Answer · 2013-08-05 18:44:05Z

4

An indent error means that the indents don't line up. You should make sure that the line out_file.write(identifier) lines up with identifier = data ['items'][i]['id'], and that you don't mix up tabs with spaces.

answered Aug 5, 2013 at 18:44

jh314

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2 Comments

theodox Over a year ago

... and if you demoted out_file.write all the way to left margin, it would fire after the loop had completed and only write one value - exactly what you're seeing.

user2161557 Over a year ago

Thank you. You are all quite right. The issue in my particular case was that I had some trailing tabs that were screwing things up. I think the lesson learned here is that when there are mysterious indentation errors to show the invisible characters to make sure everything is what you think it is.

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