abstrak:本文給大家介紹的是python中的內(nèi)置函數(shù)oct(),其主要作用是將十進(jìn)制數(shù)轉(zhuǎn)換成八進(jìn)制,再變成字符。有需要的小伙伴可以參考下oct ( x ) Convert an integer number to an octal string. The result is&nb
本文給大家介紹的是python中的內(nèi)置函數(shù)oct(),其主要作用是將十進(jìn)制數(shù)轉(zhuǎn)換成八進(jìn)制,再變成字符。有需要的小伙伴可以參考下
oct ( x ) Convert an integer number to an octal string. The result is a valid Python expression. If x is not a Pythonobject, it has to define anmethod that returns an integer.
說(shuō)明:
1. 函數(shù)功能將一個(gè)整數(shù)轉(zhuǎn)換成8進(jìn)制字符串。如果傳入浮點(diǎn)數(shù)或者字符串均會(huì)報(bào)錯(cuò)。
>>> a = oct(10) >>> a '0o12' >>> type(a) # 返回結(jié)果類型是字符串 <class 'str'> >>> oct(10.0) # 浮點(diǎn)數(shù)不能轉(zhuǎn)換成8進(jìn)制 Traceback (most recent call last): File "<pyshell#3>", line 1, in <module> oct(10.0) TypeError: 'float' object cannot be interpreted as an integer >>> oct('10') # 字符串不能轉(zhuǎn)換成8進(jìn)制 Traceback (most recent call last): File "<pyshell#4>", line 1, in <module> oct('10') TypeError: 'str' object cannot be interpreted as an integer
2. 如果傳入?yún)?shù)不是整數(shù),則其必須是一個(gè)定義了__index__并返回整數(shù)函數(shù)的類的實(shí)例對(duì)象。
# 未定義__index__函數(shù),不能轉(zhuǎn)換 >>> class Student: def __init__(self,name,age): self.name = name self.age = age >>> a = Student('Kim',10) >>> oct(a) Traceback (most recent call last): File "<pyshell#12>", line 1, in <module> oct(a) TypeError: 'Student' object cannot be interpreted as an integer # 定義了__index__函數(shù),但是返回值不是int類型,不能轉(zhuǎn)換 >>> class Student: def __init__(self,name,age): self.name = name self.age = age def __index__(self): return self.name >>> a = Student('Kim',10) >>> oct(a) Traceback (most recent call last): File "<pyshell#18>", line 1, in <module> oct(a) TypeError: __index__ returned non-int (type str) # 定義了__index__函數(shù),而且返回值是int類型,能轉(zhuǎn)換 >>> class Student: def __init__(self,name,age): self.name = name self.age = age def __index__(self): return self.age >>> a = Student('Kim',10) >>> oct(a) '0o12'
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