451 #4.1.8 Domain of sender address does not resolve

Question

I'm trying to learn Python for some bioinformatics/biology related type of research. I don't have a lot of programming experience outside of Java - which is very limited. I'm currently trying to use python to create a text file and write something into it. I'm able to do this, but when I select "run module" in IDLE, the text files are created, but there isn't any text. However, when I actually run the file outside of IDLE, the files are created with the text. What is the reason for this?

Edit:

Here's the code (it's based off of an exercise from a textbook I'm using):

genomic_dna_file = open("genomic_dna.txt")
genomic_dna = genomic_dna_file.read()

exon1 = genomic_dna[0:63]
exon2 = genomic_dna[90:]
coding = exon1 + exon2
noncoding = genomic_dna[63:90]


coding_file = open('coding.txt', 'w')
noncoding_file = open('noncoding.txt', 'w')
coding_file.write(coding)
noncoding_file.write(noncoding)

Solution

This looks like a temporary DNS issue on receiving side. Their server just can't resolve your address for some reason. I think nothing can be done to fix that on your side. Probably you should contact their representative using another email and ask them to address this issue.

Comments

[Michael]

Can you please provide the code in question?

[Jay P]

I've edited the original post with the code.

[user131368]

it probably was, problem is solved now

[Jay P]

Thanks. This was the fix. I assumed that this might have been the issue, but I didn't try it.