Some code taken from: Snakemake – How do I use each line of a file as an input?

def read_tissues_output():
    with open('accessions.txt') as f:
        samples = [sample for sample in f.read().split('n') if len(sample) > 0]  # we dont want empty lines
        return expand("{sample}.txt", sample=samples)


rule all:
    input:
        read_tissues_output()
         
         
rule create_directory:
    output:
        "{n}/{n}.txt"
    shell:
        """
        echo this is a {wildcards.n} > {output}
        """

accessions.txt is a txt file with different accession numbers per line. I want to generate a new directory of the same name as the text file being generated, and move the text file generated in that directory.

When the output is output:”{n}.txt”, each text file is being generated at the same directory of the Snakefile, which is good. but when I do as above, the expected result is the .txt file of different accession number is moved a folder of its own name, but instead I get an error saying:

“Missing input files for rule all:
affected files:
SRRXXXXX.txt”

not sure why this is the case.