Question

我有一个文件city.py，我想在下面做两件事：

1.copy city.py为newyork.py和losangeles.py。

2. city中有一个单词city.py，我想将其替换为newyork和losangeles。

我写了一个文件copy_city.py来执行此操作：

import shutil

def copy_city():
    cities = ['newyork', 'losangeles']
    for c in cities:
        city_file_name = c +'.py'
        shutil.copyfile('city.py',city_file_name)
        with open(city_file_name, "r+") as f:
            read_data = f.read()
            read_data.replace('city', c)



if __name__ == "__main__":
    copy_city()

问题： 文件city.py可以成功复制，但文件city和newyork.py中的losangeles.py字词无法替换。为什么？

Answer 1

我使用了这个answer about reading and writing contents to the same file

import shutil

def copy_city():
    cities = ['newyork', 'losangeles']
    for c in cities:
        city_file_name = c +'.py'
        line = ''
        shutil.copyfile('city.py',city_file_name)
        with open(city_file_name, "r") as f:
            read_data = f.read()
            line = read_data.replace('city', c)
            f.close()

        with open(city_file_name, "w") as f:
          f.write(line)
          f.close()

if __name__ == "__main__":
    copy_city()

python 3：替换文件中的文本

1 个答案: