使用另一个 with 语句在写入模式下再次打开文件。使用 for 循环遍历刚才读取的内容，使用变量来跟踪当前行号，当到达要删除的行时，跳过该行的写入。defremove_line(fileName,lineToSkip):with open(fileName,'r', encoding='utf-8') as read_file: lines = read_file.readlines() currentLine = 1with...
在写入文件时,跳过该行的写入。 with open("1.txt",'r', encoding='utf-8') as read_file: lines = read_file.readlines() shortest = 1000 lineToDelete = "" for line in lines: if len(line) < shortest: shortest = len(line) lineToDelete = line with open("1.txt",'w', encoding='ut...
这时,我们可以使用循环结构来处理多个文件,将删除最后一行的操作应用到每个文件上。 defbatch_delete_last_line(filenames):forfilenameinfilenames:withopen(filename,'r')asfile:lines=file.readlines()withopen(filename,'w')asfile:file.writelines(lines[:-1])filenames=['file1.txt','file2.txt','fi...
definteractive_delete_lines(filename):withopen(filename,'r')asfile:lines=file.readlines()print("文件内容:")fori,lineinenumerate(lines):print(f"{i+1}:{line}")indices=input("输入要删除的行号(逗号分隔):")indices=[int(i)-1foriinindices.split(",")]withopen(filename,'w')asfile:fori,...
Learn How to remove lines from a file by line numbers. Remove lines that match the specific text. Delete first and Last lines from file.
) except IOError: print("错误:无法重命名文件 " + filename) def delete_file(filename): try: os.remove(filename) print("文件 " + filename + " 成功删除。") except IOError: print("错误:无法删除文件 " + filename) if __name__ == '__main__': filename = "example.txt" new_file...
def delete_lines_with_string(filename, string): # 打开文件 file = open(filename, 'r') # 读取文件内容 lines = file.readlines() # 关闭文件 file.close() # 删除包含特定字符串的行 for line in lines: if string in line: lines.remove(line) # 重新写入文件 file = open(filename...
(handle, f'patch delete all', choice) if ret is None: return ERR, result return OK, ret @staticmethod @cli_operation def reset_next_feature_plugin(file_path, ops_obj=None, handle=None): ops_obj.cli.execute(handle, "return") ret, _, result = ops_obj.cli.execute(handle, f'reset ...
defuse_context_manager_1(file):withopen(file, "a") as f:for line in_valid_records():f.write(str(line))defuse_close_method(file):f =open(file, "a")for line in_valid_records():f.write(str(line))f.close()use_close_method("test.txt")use_context_manager_1("test.txt")use_context...
_delete_:使用_del_方法是否调用该方法 _slots_:一个属性名称的集合,并且只能使用这些属性 通过限制属性的种类,利用白名单制度,让代码更有鲁棒性 access这些属性时候速度更快 更加节省内存 _init_subclass_方法:对子类方法进行赋值 _iter_方法:[什么是迭代器 ](zhuanlan.zhihu.com/p/31) _call_方法:一个类的实...