需要根据情况进行转换: # Python 3 b = b"Hello, world!" s = b.decode('utf-8') # bytes to str b = s.encode('utf-8') # str to bytes 四、更新标准库模块 在Python 3中,标准库中的一些模块名称有所变化,需要相应地更新代码。例如: urllib模块: # Python 2 import urllib2 Python 3 import...
urllib.parse.unquote(string, encoding=’utf-8’, errors=’replace’)、urllib.parse.unquote_plus(string, encoding=’utf-8’, errors=’replace’)、urllib.parse.unquote_to_bytes(string) 1. 2. 这三个函数分别与上面的quote()、quote_plus()、quote_from_bytes()相对应,解析相应函数处理过的URL; url...
pack function in the Python struct module could convert int to bytes in both Python 2.7 and Python 3, and int_to_bytes() from Python 3.1 could convert int to bytes with the specified byte order.
/lib/../lib64/libopencv_highgui.so: undefined reference to `TIFFReadRGBATile@LIBTIFF_4.0' /lib/../lib64/libopencv_highgui.so: undefined reference to `TIFFClose@LIBTIFF_4.0' /lib/../lib64/libopencv_highgui.so: undefined reference to `TIFFRGBAImageOK@LIBTIFF_4.0' /lib/../lib64/libopencv...
10.数据类型 bytes 字节码类型 打开文件 open 函数式编程, map、filter 和 reduce 可迭代的对象, next() https://www.runoob.com/python/python-2x-3x.html refs https://pythonconverter.com/ https://docs.python.org/2/library/2to3.html ©xgqfrms 2012-2025 ...
python3 renamed the unicode type to str ,the old str type has been replaced by bytes. 跟Python 2 类似,Python 3 也有两种类型,一个是 Unicode,一个是 byte 码。但是他们有不同的命名。 现在你从普通文本转换成 “str” 类型后存储的是一个 unicode, “bytes” 类型存储的是 byte 串。你也可以通过...
1. str和bytes 1.1 str是文本,bytes是字节 文本是有编码的(UTF-8,GBK,GB2312等) 字节没有编码 文本的编码指的是字符如何使用字节来表示组织方式,linux下默认都使用UTF-8 通过b前缀可以定义bytes 2. Python2和Python3的编码 2.1 Python2 在python2 中是不区分bytes和str类型的,在python3中bytes和s... ...
s.tobytes() √ 把所有元素的机器值用 bytes 对象的形式返回 s.tofile(f) √ 把所有元素以机器值的形式写入一个文件 s.tolist() √ 把数组转换成列表,列表里的元素类型是数字对象 s.typecode √ 返回只有一个字符的字符串,代表数组元素在 C 语言中的类型 从Python 3.4 开始,数组(array)类型不再支持诸如...
backporting the bytes type from Python 3 so that you have semantic parity between the major versions of Python. Modernize, on the other hand, is more conservative and targets a Python 2/3 subset of Python, directly relying on six to help provide compatibility. As Python 3 is the future, ...
There are some differences between byte literals in Python 2 and those in Python 3 thanks to the bytes type just being an alias tostrin Python 2. Probably the biggest “gotcha” is that indexing results in different values. In Python 2, the value ofb'py'[1]is'y', while in Python 3 ...