利用for循环按行读取文件
import sys
input_file = sys.argv[1]
fileread = open(input_file, ‘r‘, encoding=‘UTF-8‘)
line_number = 0
for a in fileread:
line_number += 1
print(line_number, a, end=‘\r‘)
fileread.close()
encoding=‘UTF-8’ 可以避免出现如下错误：
UnicodeDecodeError: ‘gbk‘ codec can‘t decode byte 0x81 in position 282: illegal multibyte sequence
import sys
input_file = sys.argv[1]
fileread = open(input_file, ‘r‘, encoding=‘UTF-8‘)
line_number = 0
while True:
line_number += 1
line = fileread.readline()
if line == ‘‘:
break
print(line_number, line, end=‘\r‘)
fileread.close()
原文：https://www.cnblogs.com/wlinuxtop/p/11788709.html