Python中的 int()函数

Python int()函数从给定对象返回整数或将给定基数中的数字转换为十进制。

Python int() 语法：

int(string, base)

Python int() 参数：

• 字符串：由 1 和 0 组成
• 基数：（整数值）数字的基数。

Python int() 返回：

返回一个整数值，它等效于给定基数中的二进制字符串。

Python int() 异常和错误：

TypeError ：当字符串或整数以外的任何数据类型在其等效位置传递时，返回 TypeError。

Python int() 方法示例

示例 1：在Python中使用 int()函数

Python3

# Python3 program for implementation
# of int() function
num = 13
 
String = '187'
 
# Stores the result value of
# binary "187" and num addition
result_1 = int(String) + num
print("int('187') + 13 = ", result_1, "\n")
 
# Example_2
str = '100'
 
print("int('100') with base 2 = ", int(str, 2))
print("int('100') with base 4 = ", int(str, 4))
print("int('100') with base 8 = ", int(str, 8))
print("int('100') with base 16 = ", int(str, 16))

输出 ：

int('187') + 13 =  200 

int('100') with base 2 =  4
int('100') with base 4 =  16
int('100') with base 8 =  64
int('100') with base 16 =  256

示例 2：将二进制字符串转换为Python int base

Python3

# Python3 program for implementation
# of int() function
 
# "111" taken as the binary string
binaryString = "111"
 
# Stores the equivalent decimal
# value of binary "111"
Decimal = int(binaryString, 2)
 
print("Decimal equivalent of binary 111 is", Decimal)
 
# "101" taken as the octal string
octalString = "101"
 
# Stores the equivalent decimal
# value of binary "101"
Octal = int(octalString, 8)
 
print("Decimal equivalent of octal 101 is", Octal)

输出 ：

Decimal equivalent of binary 111 is 7
Decimal equivalent of octal 101 is 65

示例 3：演示 TypeError 的程序

Python3

# Python3 program to demonstrate
# error of int() function
 
 
# when the binary number is not
# stored in as string
binaryString = 111
 
# it returns an error for passing an
# integer in place of string
decimal = int(binaryString, 2)
 
print(decimal)

输出 ：

TypeError: int() can't convert non-string with explicit base

示例 4： Python int() 异常

Python3

try:
    var = "Geeks"
    print(int(var))
except ValueError as e:
    print(e)

输出：

invalid literal for int() with base 10: ‘Geeks’

应用 ：

它用于所有标准转换。例如二进制转十进制、八进制转十进制、十六进制转十进制。