进度条:
1 import sys 2 import time 3 4 for i in range(50): 5 sys.stdout.write("*") 6 sys.stdout.flush() 7 time.sleep(0.1)
文件读取(效率高效的读取大文件方法,一行读取后释放内存):
1 count = 0 2 for line in f: 3 if count == 9: 4 print("------我是分割线------") 5 count += 1 6 continue 7 print(line) 8 count += 1