Question

numberofbands = int(input("How many bands are there in the competition? "))



print("Input each band’s name pressing enter after each one") 

file = open("scores.txt","w") 
for loop in range(numberofbands): 
  name = input("\nEnter the name of the band: ") 
  votes = input("Enter how many votes that band received: ")
  file.write(name + "," + votes + "," + "\n") 
file.close() 

number_of_lines = len(open("scores.txt").readlines(  ))

def removebelowthreshold():
   threshold = int(input("Choose the threshold of scores to remove bands which are below"))


removebelowthreshold()

该代码将采用乐队的名称并将其记分到文件中。

然后，如果乐队的分数低于用户指定的某个阈值，则应在文件中删除乐队的详细信息。希望您能提供帮助。

提前谢谢

Answer 1

为什么要先写文件，然后才尝试过滤文件？文件I / O操作在逻辑上是更昂贵的操作，因此您应将它们最小化。您应该在其他输入之前要求阈值，然后在文件写入循环中添加一个条件：

threshold = int(input("Choose the threshold of scores to remove bands which are below"))

numberofbands = int(input("How many bands are there in the competition? "))

print("Input each band’s name pressing enter after each one") 

file = open("scores.txt","w") 
for loop in range(numberofbands): 
    name = input("\nEnter the name of the band: ") 
    votes = input("Enter how many votes that band received: ")
    if int(votes) >= threshold:
        file.write(name + "," + votes + ",\n") 
file.close() 

number_of_lines = len(open("scores.txt").readlines(  ))

很显然，您需要执行多种数据类型和范围检查才能使程序更健壮，但是基本逻辑是这样。

删除文件中低于特定阈值的频段

1 个答案: