用python将文件内的文件后缀为大写的文件，改成小写后缀

以下是一个使用Python编写的示例代码，可以将文件中所有文件后缀为大写的文件改为小写后缀：

import os

def rename_files_with_lowercase_extension(directory):
    for filename in os.listdir(directory):
        if os.path.isfile(os.path.join(directory, filename)):
            name, ext = os.path.splitext(filename)
            new_filename = name + ext.lower()
            if filename != new_filename:
                old_path = os.path.join(directory, filename)
                new_path = os.path.join(directory, new_filename)
                os.rename(old_path, new_path)
                print(f"Renamed '{filename}' to '{new_filename}'.")

# 指定目录路径
directory_path = "/path/to/directory"

# 调用函数进行重命名
rename_files_with_lowercase_extension(directory_path)

请确保将/path/to/directory替换为你要操作的目录的实际路径。运行此代码后，它将遍历指定目录中的所有文件，将文件名中后缀为大写的文件改为小写后缀，并打印每个文件的重命名结果。

import os

def rename_files_with_lowercase_extension(directory):
    for filename in os.listdir(directory):
        if os.path.isfile(os.path.join(directory, filename)):
            if os.path.sep not in filename:
                name, ext = os.path.splitext(filename)
                new_filename = name + ext.lower()
                if filename != new_filename:
                    old_path = os.path.join(directory, filename)
                    new_path = os.path.join(directory, new_filename)
                    os.rename(old_path, new_path)
                    print(f"Renamed '{filename}' to '{new_filename}'.")

# 指定目录路径
directory_path = "/path/to/directory"

# 调用函数进行重命名
rename_files_with_lowercase_extension(directory_path)