将值写入文件时遇到问题

Question

我正在编写一个程序，其中用户输入要生成的随机数的下限和上限以及要生成的随机数的数量。之后，程序将写入一个新文件“randomnum.txt”。除了写入文件之外，我的程序中的所有方面都在工作。程序完成后，“randomnum.txt”中没有写入任何值。任何帮助表示赞赏！ #导入随机目录 随机导入

#Import randint function
from random import randint

#Create and open the new file
new_file = open("/Users/masonadrales/Desktop/Python 
Assignments/Randomwrite:read/randomnum.txt","w")

#Get input for the amount of numbers
while (True):
    try:
        number_random = float(input("How many random numbers would 
you like? "))
        if (number_random < 0):
            print("Sorry! The program only accepts positive 
values.")
            continue
    except ValueError:
        print('The value you entered is invalid. Only positive 
values please!')
    else:
        break
#Ask for the lower limit of the random range
while (True):
    try:
        lower_limit = float(input("What is the lowest the random 
number should be: "))
        if (lower_limit < 0):
            print("Sorry! The program only accepts positive 
values.")
            continue
    except ValueError:
        print('The value you entered is invalid. Only positive 
values please!')
    else:
        break
#Ask for the higher limit of the random range
while (True):
    try:
        high_limit = float(input("What is the highest the random 
number should be: "))
        if (high_limit < 0):
            print("Sorry! The program only accepts positive 
values.")
            continue
    except ValueError:
        print('The value you entered is invalid. Only positive 
values please!')
    else:
        break
#Attempt #1 to generate (number_random) amount of random numbers 
between lower and high limit
try:
    for randomNumber in range(int(number_random)):
        line = str(random.randint(lower_limit, high_limit))
        new_file.write(line)
        print(line)
except ValueError:
    new_file.close()
#Print where the numbers were written to
print("The random numbers were written to randomnum.txt.")

Answer 1

您的问题实际上是在写入文件之前。

您在line = str(random.randint(lower_limit, high_limit)) 行中调用了random.randint，而实际上您只在顶部导入了randint。只需将其更改为 line = str(randint(lower_limit, high_limit)) 即可。

改变那一行使你的代码工作：

#Import randint function
from random import randint

#Create and open the new file
new_file = open("randomnum.txt","w")

#Get input for the amount of numbers
while (True):
    try:
        number_random = float(input("How many random numbers would you like? "))
        if (number_random < 0):
            print("Sorry! The program only accepts positive values.")
            continue
    except ValueError:
        print('The value you entered is invalid. Only positive values please!')
    else:
        break
#Ask for the lower limit of the random range
while (True):
    try:
        lower_limit = float(input("What is the lowest the random number should be: "))
        if (lower_limit < 0):
            print("Sorry! The program only accepts positive values.")
            continue
    except ValueError:
        print('The value you entered is invalid. Only positive values please!')
    else:
        break
#Ask for the higher limit of the random range
while (True):
    try:
        high_limit = float(input("What is the highest the random number should be: "))
        if (high_limit < 0):
            print("Sorry! The program only accepts positive values.")
            continue
    except ValueError:
        print('The value you entered is invalid. Only positive values please!')
    else:
        break
#Attempt #1 to generate (number_random) amount of random numbers between lower and high limit
try:
    for randomNumber in range(int(number_random)):
        line = str(randint(lower_limit, high_limit))
        new_file.write(line)
        print(line)
except ValueError:
    new_file.close()
#Print where the numbers were written to
print("The random numbers were written to randomnum.txt.")

示例会话：

How many random numbers would you like? 7
What is the lowest the random number should be: 4
What is the highest the random number should be: 7
5
5
7
4
4
6
7
The random numbers were written to randomnum.txt.

randomnum.txt 的内容：

5574467

如果您希望每次在新行上打印数字，只需将输出写入的那一行更改为：

new_file.write(line + '\n')