python 处理数字,把大于上限的数字置零实现方法

# coding=utf-8
# 用来处理数字，大于上限的数字置零
 
f = open("/home/chuwei/桌面/trainA/loss/d_losses.txt")
line = f.readline()
k = open("/home/chuwei/桌面/trainA/loss/d_losses_1.txt","a")
while line:
  # print("line:",(line))
  if (float(line) > 0.5):
    print("line:", (line))
    line = 0.0
    line = str(line)
    k.write(line)
    k.write("\n")
  else:
    k.write(line)
  line = f.readline()
 
f.close()