os.SEEK_CUR - current position os.SEEK_END - end of file A positive offset will move the pointer forward, a negative offset would move backward. Special cases There are two special cases: fh.seek(0, os.SEEK_SET) - go to the beginning of the file. ...
In text files (those opened without a b in the mode string), only seeks relative to the beginning of the file are allowed (the exception being seeking to the very file end with seek(0, 2)).（https://docs.python.org/3.2/tutorial/inputoutput.html#methods-of-file-objects）
seek(offset,from)有2个参数: offset:偏移量,正数代表往右移动,负数代表往左移动。from:指针从哪里开始移动0:表示文件开头1:表示当前位置2:表示文件末尾 官方文档原话:In text files (those opened without a b in the mode string),only seeks relative to the beginning of the file are allowed (the excepti...
Writes a list of elements that are all strings to a file.seek()方法 改变当前文件操作指针的位置,0-文件开头: 1-当前位置; 2-文件结尾 Change the position of the current file operation pointer, 0 - the beginning of the file: 1 - the current position; 2- End of file mode: 文件打开模式。
f.seek(offset, whence) How many points the pointer will move iscomputed from addingoffsetto a reference point; the reference point is given by thewhenceargument. The allowed values for thewhenceargument are: – Awhencevalue of0means from the beginning of the file. ...
Moved __future__ import to beginning of file #7637 [@radarhere] Added type hints to ImageSequence #7635 [@radarhere] Add type hints for ImageMode #7633 [@hugovk] Add from __future__ import annotations using Ruff/isort #7631 [@hugovk] Check types with mypy #7622 [@hugovk] Added type...
链接地址:https://docs.python.org/3/tutorial/inputoutput.html?highlight=seek >In text files (those opened without a b in the mode string), only seeks relative to the beginning of the file are allowed (the exception being seeking to the very file end with seek(0, 2)) and the only val...
所以说,使用with语句不用费心file.close()的问题,强烈建议使用with open statement 7.2.1. Methods of File Objects 接下来的分析中我们都假定已经创建了一个名叫f的file。 To read a file’s contents, call f.read(size), which reads some quantity of data and returns it as a string (in text mode...
consumer.seek_to_beginning()formessageinconsumer: message_bytes = message.value message_string = message_bytes.decode() message_object = json.loads(message_string) print(message_object) 开发者ID:rjurney,项目名称:Agile_Data_Code_2,代码行数:15,代码来源:python_kafka.py ...
I always built to last on weak and shifting sand 但我总是将之建筑在易逝的流沙上 I lived by night and shunned the naked light of day 我夜夜笙歌 逃避白昼赤裸的阳光 And only now I see how the time ran away 事到如今我才看清岁月是如何匆匆流逝 ...