10个python3实用功能代码合集

以下是一些 Python 3 的实用功能代码合集：

读取文件并返回字符串

def read_file(file_path):
    with open(file_path, 'r') as f:
        return f.read()

写入字符串到文件

def write_file(file_path, content):
    with open(file_path, 'w') as f:
        f.write(content)

获取文件扩展名

import os

def get_file_extension(file_path):
    return os.path.splitext(file_path)[1]

遍历目录并获取所有文件的路径

import os

def get_all_files_in_directory(directory):
    files = []
    for root, dirs, filenames in os.walk(directory):
        for filename in filenames:
            file_path = os.path.join(root, filename)
            files.append(file_path)
    return files

遍历目录并获取所有子目录的路径

import os

def get_all_subdirectories(directory):
    subdirectories = []
    for root, dirs, filenames in os.walk(directory):
        for dir_name in dirs:
            dir_path = os.path.join(root, dir_name)
            subdirectories.append(dir_path)
    return subdirectories

合并两个字典

def merge_dicts(dict1, dict2):
    return {**dict1, **dict2}

将列表按照指定大小分割

def split_list(input_list, size):
    return [input_list[i:i+size] for i in range(0, len(input_list), size)]

获取当前时间戳

import time

def get_timestamp():
    return int(time.time())

将字典转换为查询字符串

def dict_to_query_string(query_dict):
    return '&'.join([f'{key}={value}' for key, value in query_dict.items()])

计算两个日期之间的天数

from datetime import datetime

def days_between_dates(date1, date2):
    date1_obj = datetime.strptime(date1, '%Y-%m-%d')
    date2_obj = datetime.strptime(date2, '%Y-%m-%d')
    delta = date2_obj - date1_obj
    return delta.days

希望这些代码可以帮助你在 Python 3 中更轻松地完成一些实用功能。