frame.idxmax() one b two d dtype: object frame.cumsum() one two a 1.40 NaN b 8.50 -4.0 c NaN NaN d 9.23 -5.0 # describe针对数值型 frame.describe() one two count 3.000000 2.00000 mean 3.076667 -2.50000 std 3.500376 2.12132 min 0.730000 -4.00000 25% 1.065000 -3.25000 50% 1.400000 -2.5...
TypeError: a bytes-like object is required, not 'str' 问题分析 该问题主要是由于当前操作的字符串是bytes类型的字符串对象,并对该bytes类型的字符串对象进行按照str类型的操作。 如下面图所示,s 为bytes类型字符串对象。 当对s进行按照str类型的操作(split)时,会弹出一下错误提示。因为split函数传入的参数是st...
6、解决“TypeError: 'str' object does not support item assignment”错误提示 7、解决 “TypeError: Can't convert 'int' object to str implicitly”错误提示 8、错误的使用类变量 9、错误地理解Python的作用域 Hello!你好呀,我是灰小猿,一个超会写bug的程序猿! 前两天总结了一篇关于Python基础入门的文章“...
在Python中,bytes和str类型是不同的。bytes-like object是指可以像bytes一样进行操作的对象,但并不一定是bytes类型。常见的bytes-like object包括字节串(bytes)、bytearray对象、memoryview对象等。而str类型指的是unicode字符串,是由一系列Unicode字符组成的序列。 在Python 3中,bytes类型表示二进制数据,而str类型用于...
#bytes objectb = b"example"#str objects ="example"#str to bytessb = bytes(s, encoding ="utf8")#bytes to strbs = str(b, encoding ="utf8")#an alternative method#str to bytessb2 =str.encode(s)#bytes to strbs2 = bytes.decode(b)...
bytes 格式编码成 str 类型: bytes.decode(b) 另附: python str与bytes之间的转换 #bytes objectb = b"example"#str objects ="example"#str to bytesbytes(s, encoding ="utf8")#bytes to strstr(b, encoding ="utf-8")#an alternative method#str to bytesstr.encode(s)#bytes to strbytes.decode...
# bytes对象不支持修改>>>b_utf8[]=2Traceback (mostrecentcalllast):File"<pyshell#82>", line1, in<module>b_utf8[]=2TypeError: 'bytes'objectdoesnotsupportitemassignment 1.6 比较bytes对象 # 比较bytes对象的字节值>>>b_utf8==b_gbkFalse 1.7 bytes对象的+和* # bytes对象的+(连接)、*...
实例如下: # bytes object b = bexample # str object s = example # str to bytes bytes(s, encoding = utf8) # bytes to str str(b, encoding = utf-8) # an alternative method # str to bytes str.encode(s) # bytes to str bytes.decode(b) 以上这篇python字符串str和字节数组相互转化方法...
line1,in<module>ZeroDivisionError:division by zero>>>4+spam*3Traceback(most recent call last):File"<stdin>",line1,in<module>NameError:name'spam'is not defined>>>'2'+2Traceback(most recent call last):File"<stdin>",line1,in<module>TypeError:Can't convert 'int' object to str ...
bytes(x, encoding, error) Parameter Values ParameterDescription xA source to use when creating the bytes object. If it is an integer, an empty bytes object of the specified size will be created. If it is a String, make sure you specify the encoding of the source. ...