为什么数据写入的是out_file变量，但结果会出现在to_filr中呢？(语言-python)

Question

#读取数据后的数据写入了out_file变量，是哪一步完成了将数据写入to_file中呢？
#
from sys import argv
from os.path import exists

script, from_file, to_file = argv

print(f"Copping from {from_file} to {to_file}")

#we could do these two on one line, how?
in_file = open(from_file)
in_data = in_file.read()

print(f"The input file is {len(in_data)} bytes long")

print(f"Does the output file exists? {exists(to_file)}")
print("Ready, hit RETURN to continue, CTRL-C to abort.")
input()

out_file = open(to_file, 'w')
out_file.write(in_data)

print("Alright, all done")
in_file.close()
out_file.close()

Answer 1

to_file保存的是一个字符串，这个字符串是一个文件的路径
out_file = open(to_file, 'w')的意思是以w模式（覆盖写模式）去打开to_file（文件路径）文件。返回一个文件对象。
out_file.write(in_data)，文件对象执行写入操作