把多行fa序列文件变为2行_20220505

line1=''
with open(r'C:\Users\Downloads\sequence.fasta','r') as f1:
    for line in f1:
        line=line.strip('\n')
        # if line.startswith('A'):
        #     line1=line1+'\n'+line
        # elif line.startswith('T'):
        #     line1=line1+'\n'+line
        # elif line.startswith('C'):
        #     line1=line1+'\n'+line
        # elif line.startswith('G'):
        #     line1=line1+'\n'+line
        if line.startswith('>'):
            line1=line1+'\n'+line+'\n'
        # line1=line1+line
        else:
            line1=line1+line
print(line1)

# with