Traceback (most recent call last): File "/python/bytes_str.py", line 50, in <module> print(b'hello %s' % 'world') # 抛出异常TypeError: %b requires a bytes-like object, or an object that implements __bytes__, not 'str' 1. 第2个问题是涉及文件句柄的操作(由打开的内置函数返回),...
print 'first line:',first_line #读一行 print '我是分隔线'.center(50,'-') data = f.read() # 读取剩下的所有内容,文件大时不要用。 print data #打印读取内容 f.close() #关闭文件 1. 2. 3. 4. 5. 6. 7. 2.2 文件编码 查看编码格式 import chardet f = open('file.txt') #打开文件...
try: string = " immutable" string[0] = 'I' # 这将会抛出异常 except TypeError as e: print(e) # 输出: 'str' object does not support item assignment 2.3 字符串索引与切片 你可以通过索引来访问字符串中的单个字符,或者使用切片来获取子字符串: greeting = "Greetings, Earthling!" print(greeting[...
abs()delattr()hash()memoryview()set()all()dict() help()min()setattr()any()dir()hex()next()slice()ascii()divmod()id()object()sorted()bin()enukerate()input()oct()staticmethod()bool()eval()int()open()str()breakpoint()exec()isinstance()ord()sum()bytearray()filter()issubclass()po...
bytes_per_sep How many bytes between separators. Positive values countfromthe right, negative values countfromthe left. Thereturnvalueisa bytesobject. This functionisalso availableas"hexlify()". Example:>>> binascii.b2a_hex(b'\xb9\x01\xef') ...
- 字节串(`bytes`对象)则是字节的有序序列,每个字节是8位的二进制数,直接存储在内存中,用于表示二进制数据或编码后的文本数据。 【通义end】 】 with open(file_path, mode='r', encoding='gbk') as file: for line in file: print(line.rstrip('\n')) # 去除每行末尾的换行符,确保在终端输出时格...
import hashlib # 原始消息 message = "My secret password" # 创建SHA-256哈希对象 hash_object = hashlib.sha256() # 将消息编码并加入到哈希对象中 hash_object.update(message.encode()) # 获取哈希摘要 hashed_message = hash_object.hexdigest() print(f"原始消息:{message}") print(f"SHA-256摘要:...
decode(hex_val, "hex") print(byte_val) This program decodes the hex_val string using the codecs.decode() function with the encoding argument set to 'hex'. This means it will interpret the input string as a hexadecimal value and convert it to bytes.Output:...
编码:s.encode()将字符串转换为二进制数据(bytes) 解码:s.decode()将bytes类型的数据转换成字符串类型 s = '人生苦短,我用Python!'# 编码print(s.encode(encoding='utf_8')) # utf-8 一个中文占两个字节print(s.encode(encoding='GBK')) # GBK 一个中文占三个字节# 解码byte = s.encode(encoding...
print(bytes.fromhex(hex_string)) # b'\xde\xad\xbe\xef' Recommended Tutorial:How to Convert a Hex String to a Bytes Object in Python? After reading this, you may wonder: What’s the Difference Between bytearray and bytes? The difference betweenbytearrayandbytestypes is thatbytesis an immu...