python - 如何在 Python 中按顺序向文件写入多行

Question

请看下面的代码-

from sys import argv
from urllib2 import urlopen
from os.path import exists

script, to_file = argv

url = "http://numbersapi.com/random"

fact = 0
number = 0

print "Top 5 Facts of The World"

while fact < 5:
    response = urlopen(url)
    data = response.read()
    fact += 1
    number += 1
    print
    print "%s). %s " % (str(number), data)

print "Now, let us save the facts to a file for future use."
print "Does the output file exist? %r" % exists(to_file)
print "When you are ready, simply hit ENTER"
raw_input()
out_file = open(to_file, 'w')
out_file.write(data)
print "Alright, facts are saved in the repo."
out_file.close()

上面代码中的问题是当我打开 file1.txt 时，我只看到打印了 1 个事实。作为一种变体，我将所有内容都放在 while 循环中。它会导致同样的问题。我相信它写了一个事实，然后用下一个和下一个覆盖，直到只保存最后一个事实。

我做错了什么？

Answer 1

“数据”只保存分配给它的最后一个值。

from sys import argv

script, to_file = argv

fact = 0
number = 0

out_file = open(to_file, 'w')
while fact < 5:
    data = str(fact)
    out_file.write(str(data) + '\n')
    fact += 1
    number += 1
    print
    print "%s). %s " % (str(number), data)
out_file.close()