浮点型(float) 布尔型(bool) 复数性(complex) 字符型(string):表示数据组成是字符 列表(list):用来表示一组有序元素,后期数据可以修改 ['A','B','C'] 元组(tuple):用来表示一组有序元素,后期数据不可修改 ('A','B','C','1') 集合(set):一组数据无序不重复元素 set([1,2,3,4]) 字典(dictio...
Python 3.x makes a clear distinction between the types: str = ‘…’ literals = a sequence of Unicode characters (UTF-16 or UTF-32, depending on how Python was compiled) bytes = b’…’ literals = a sequence of octets (integers between 0 and 255) CPP实现encode 就是做个笔记,毕竟在做...
Numbers (数字) String(字符串) List(列表) Tuple(元祖) sets(集合) Disctionaries(字典) >>> a, b, c, d = 20, 5.5, True, 4+3j >>>print(type(a), type(b), type(c), type(d))<class'int'> <class'float'> <class'bool'> <class'complex'> 数值运算: >>> 5 + 4#加法9 >>> ...
print("Not found the item") 33. TypeError: list indices must be integers or slices 列表的下标必须是整数或者是切片。 >>> a = ["aaa", "bbb", "ccc"] >>> a['1'] Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: list indices must be integers ...
不可变类型:string、int、float、tuple、不可变集合30、求结果:1 2 3 4 5 6 7 8 9 10 11 # Python 字典 fromkeys() 函数用于创建一个新字典,以序列 seq 中元素做字典的键,value 为字典所有键对应的初始值。 # dict.fromkeys(seq, value) v = dict.fromkeys(['k1', 'k2'], []) print(v) # ...
Numbers (数字) String(字符串) List(列表) Tuple(元祖) sets(集合) Disctionaries(字典) >>> a, b, c, d = 20, 5.5, True, 4+3j >>> print(type(a), type(b), type(c), type(d)) <class 'int'> <class 'float'> <class 'bool'> <class 'complex'> ...
>>> 052 File "", line 1 SyntaxError: leading zeros in decimal integer literals are not permitted; use an 0o prefix for octal integers 您可以使用任何提到的整数文字以不同的方式表达相同的值: >>> >>> 42 == 0b101010 == 0x2a == 0o52 True ...
#Three main ways to convert string to int in Python int()constructor eval()function ast.literal_eval()function #1. Using Pythonint()constructor This is the most common method forconverting stringsinto integers in Python. It's a constructor of the built-in int class rather than a function. ...
int(STRING,BASE)将字符串STRING转成十进制int,其中STRING的基是base。该函数的第一个参数是字符串 int('0x10', 16) ==> 16 类似的还有八进制oct(), 二进制bin() 16进制字符串转成二进制 hex_str='00fe' bin(int('1'+hex_str, 16))[3:] #含有前导0 ...
Before we start converting between types, it's crucial to understand what floats and integers are. In Python, an integer (int) is a number without a decimal point. A floating-point number (float), on the other hand, is a number that contains a decimal point. Floats are used when more...