Python：在Fasta标头中添加增量ID

Question

I try to create a multi fasta from a .csv file with a incremental ID in the header. But my script don't works well. Any suggestion?

M=open('/home/anna/Scrivania/db_mat/matk_2db_c.csv','r')
M_out=open('/home/anna/Scrivania/db_mat/db_matk_bronx.fas', 'w')

for i in range[1,92]:
    num = "m" + str(i)
for line in M:
    line1=line.split(',')
    ID = line1[0]
    SEQ = line1[1]
    seq =line1[2]
M_out.write('>'+ num +'_' +ID +'_'+ SEQ +'\n' + seq )

M.close()
M_out.close()

Answer 1

for i,line in enumerate(M,1):
    num = "m"+str(i)
    line1=line.split(',')
    ID = line1[0]
    SEQ = line1[1]
    seq =line1[2]
    M_out.write(...)

this just enumerates through the lines and gives you an index from 1..N where N is the number of lines

before you were iterating over all the nums, so by the time you got to for line in M num would equal "m91" for all lines