本文介绍超大文件批量替换字符 一般遇到超大文件读取，最好使用line去一行行读取，不然直接读取全部，内容过大，容易死机。 代码如下：
# coding=utf-8 file_path = "" # 文件路径 with open(file_path, "r", encoding="utf-8") as f: for line in f: print(line)这样的话文件就是一行行读取打印。下面我们将代码进行封装，读取的文件一行行去批量替换字符，再将替换好的新文本写入。 代码如下：
# coding=utf-8 def batch_replace(file_path, old_str, new_str): """ 批量替换文本字符 :param file_path:文件绝对路径 :param old_str:旧字符串 :param new_str:新字符串 :return: """ file_data = "" # 初始化 with open(file_path, "r", encoding="utf-8") as f: for line in f: # line一行行读取替换文本 if old_str in line: line = line.replace(old_str, new_str) file_data += line with open(file_path, "w", encoding="utf-8") as f: # 写入替换好的文本 f.write(file_data) print('批量替换完成')