Python 读取gz文件，字符串与字节串的相互转换

首先是字节串转字符串，也就是str：

b = b'some byte array'
 
str(b, encoding = "utf-8")  
#or
bytes.decode(b)

然后是字符串转为字节串：

s = 'some string'
 
bytes(s, encoding = "utf8")  
#or
str.encode(s)

fastq.gz文件读取

with gzip.open(fq,'r') as fastq:
	try:
		while True:
			line1 = next(fastq).decode()  # 字节转字符串
			line2 = next(fastq).decode()
			line3 = next(fastq).decode()
			line4 = next(fastq).decode()
			
	except:
			pass