NameError name genomic dna 4 is not defined

Question

I use python for biology and I got an error and I'm not sure why, even though I have the (genomic_dna_4.txt) file in the directory, also in cell2, the function "genom_coding" isn't in blue like it should be, can someone check on the code?

Cell1 :

def genom_coding(seq_filename, coding_seq_filename):
    with open(seq_filename, 'r') as file:
        sequence = ''
        for sequence in file:
            exon1 = sequence[4:58]
            exon2 = sequence[71:133]
            exon3 = sequence[189:276]
            exon4 = sequence[339:398]
    with open(coding_seq_filename, 'w') as out_file:
                print(exon1 + exon2 + exon3 + exon4 , file=file) 

Cell2 :

genom_coding(genomic_dna_4.txt, genomic_dna_4_coding.txt)

---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
<ipython-input-53-be2ad7077d60> in <module>
----> 1 genom_coding (genomic_dna_4.txt, genomic_dna_4_coding.txt)

NameError: name 'genomic_dna_4' is not defined

Comments

Hey, @Skylar,

Which python version are you working with?

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I work with Python 3.8

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I suggest you should try to execute the code with python version 3, as generally, we get this error because of version based.