Python判断文件是否为空的方法

def is_file_empty(filepath):
    try:
        with open(filepath, 'r', encoding='utf-8') as f:
            return not f.read().strip()
    except (FileNotFoundError, PermissionError):
        return None  # 文件不存在或无权限，可按需处理

import os
def is_file_zero_size(filepath):
try:
return os.path.getsize(filepath) == 0
except (FileNotFoundError, OSError):
return None

def is_file_truly_empty(filepath, sample_size=1024):
    try:
        if os.path.getsize(filepath) == 0:
            return True
        with open(filepath, 'r', encoding='utf-8') as f:
            sample = f.read(sample_size)
            return not sample.strip()
    except (FileNotFoundError, PermissionError, UnicodeDecodeError):
        return None