格式1: open(file, [mode[, buffering]])—>file object 格式2:with open(file, [mode[, buffering]]) as file object name 参数file是被打开的文件名。若文件file不存在,open()将创建该文件,然后再打开该文件。 参数mode是指文件的打开模式(默认r)。打开模式如表8-1。 参数buffering设置缓存模式。0表示...
下面是使用os模块的walk方法获取目录大小的代码示例: importosdefget_directory_size(directory):total_size=0fordirpath,dirnames,filenamesinos.walk(directory):forfinfilenames:file_path=os.path.join(dirpath,f)total_size+=os.path.getsize(file_path)returntotal_size directory="example_dir"size=get_dir...
# 1.定义空的字节序列bytesbytes() ->emptybytes # 2.定义指定个数的字节序列bytes,默认以0填充,不能是浮点数bytes(int) -> bytes of size given by the parameter initialized withnullbytes # 3.定义指定内容的字节序列bytesbytes(iterable_of_ints) # 4.定义字节序列bytes,如果包含中文的时候必须设置编码...
>>> tempB=bytes("我爱中国,I love China","gb2312") >>> print(f"{tempB}\n{tempB.decode('utf8')}\n{tempB.decode()}") Traceback (most recent call last): File "", line 1, in <module> UnicodeDecodeError: 'utf-8' codec can't decode byte 0xce in position 0: invalid continuat...
Theos.pathmodule provides a convenient method,getsize(), to retrieve the size of a file in bytes. import os file_path = "example.txt" try: file_size = os.path.getsize(file_path) print("File size:", file_size, "bytes") except FileNotFoundError: ...
read(size),每次读取size个字节的内容,适合于未知文件大小的读取; readline( ),每次读取一行内容; readlines( ),一次性读取所有内容,并按行返回list,适用于配置文件的读取。 file-like Object:像open()函数返回的这种有个read()方法的对象,在Python中统称为file-like Object。除了file外,还可以是内存的字节流,网...
file1.py file2.csv file3.txt 一个更简单的方式来列出一个目录中所有的文件是使用 os.scandir() 或pathlib.Path() : import os basepath = 'my_directory' with os.scandir(basepath) as entries: for entry in entries: if entry.is_file(): print(entry.name) 使用os.scandir() 比起os.listdir(...
# get size of file in Python file_size = os.path.getsize('bitcoin_csv.csv')/(1024*1024) # printing size of file print("File Size is :", file_size, "mega-bytes") Output: File Size is : 0.42428112030029297 mega-bytes As you can see, this time we were able to get file size in...
<Picture 'MyPlot' in <Sheet [商品清单.xlsx]表二>> 修改表三中A1单元格的宽和高 连接表三 sht_...
hint can be specified to control the number of lines read: no more lines will be read if the total size (in bytes/characters) of all lines so far exceeds hint. ‘test.txt’中有3行内容: ? 代码语言:javascript 代码运行次数:0 复制Cloud Studio 代码运行 >>> fp = open('test.txt') >>...