finding_motif_in_dna.py

seq = 'GCGAACAGTCGTGACGAAGCGAACAGCGAACACGCGAACAGGCAGTGAGATCCACAGGGCGAACAGAGCGAACAGGGCGAACAAGTATGGGCGAACAGCTTTGCGAACACGCGAACAGTGCGAACAGCGAACAGCGAACAATGCTCATCCGGGCTCAGCGAACAAGCGAACAGCGAACAGCGAACAATCGGCGAACAGTTGCGAACATCCCAGCGAACAGAGGCGAACACCGCGAACACCCACGCGAACACCGGGCGAACAGCGAACAGCGAACATTAAGCGAACACGTTAGCGAACAGAGCGAACACGCGAACAACGCGAACATGGCGAACATCCACGTTAGCGAACAGGTCCGGATGGCGAACAGCTGATCGGGACAATGCGAACACAGGCGAACAGCTTTTGCGAACAAGCGAACAGCGAACACTAGCGAACACGCGAACAGTTTCGGCGAACACTGCGAACAGCGAACACGCGAACAATGCGAACATACCGCAACGCGAACAAGCGAACAAAAATGCGAACAGCGAACAATAAGACCTAGCGAACAGCCATCCGGGCGAACAGGCCGAGCGAACATTATTGTGCGCGAACAGTAGCGAACACGGCGAACAGCGAACAGCGAACAGGCGAACATAGCGAACAGCGGCGAACACAAATAACTGCTGCGAACAGCGAACAGGGCGAACACGCGAACAGCGAACAGCGAACAGCGAACAGCGAACATAGAGCGAACAACAAGCGAACAGTATCTGCGAACACTACGCGAACAGCGAACATACGCGAACAACGTCGCCGCTGCGAACATGGGGCGAACAATAGCGCGAACAGCGAACAGTCAGCGAACAGCGAACATTTCATAGCGAACAGATCTCATAGGCGAACATCGGATCTAAGGGCGAACAAGCGAACAGGAGTAGCCGCGAACAAGCGCCTTTGCGAACAGCGAACAGCGCGAACAGCGAACATGCGTAGCGAACACAGCC'
motif = 'GCGAACAGC'

for i in range(len(seq)):
    if motif in seq[i:i+len(motif)]:
        print(i+1)