from Bio import SeqIO
from Bio.Seq import Seq


def LireFASTA(chemin):
    print("------------------------------ Lecture ------------------------------")
   

    seqs = [] 
    for record in SeqIO.parse(chemin, "fasta"):
        seqs.append(str(record.seq))
    return seqs
def fragmentersequence(seq):
    print("......................Fragmenter..................")
    
    fragment_sequence = []
    j=0
    n=0
    m=200
    if len(seq)>600 :     
        for i in seq:
                fragment_sequence= i[n:m]
                n=n+200
                m=m+200
                j=j+1
                print(fragment_sequence)
                count = SeqIO.write(fragment_sequence, "E:/fragment"+ str(j)+".txt", "fasta")
def program():
   chemin=input ("entrez chemin : ")
   res= LireFASTA(chemin)
   fragmentersequence(res)
   
if __name__ == '__main__':
   program()