在Python中解码数字？

num_str = "123"
num_int = int(num_str)
print(num_int)  # 输出: 123

num_str = "123.45"
num_float = float(num_str)
print(num_float)  # 输出: 123.45

# 二进制转十进制
binary_num = "1010"
decimal_num = int(binary_num, 2)
print(decimal_num)  # 输出: 10

# 八进制转十进制
octal_num = "12"
decimal_num = int(octal_num, 8)
print(decimal_num)  # 输出: 10

# 十六进制转十进制
hex_num = "A"
decimal_num = int(hex_num, 16)
print(decimal_num)  # 输出: 10

import json

json_str = '{"name": "Alice", "age": 30}'
data = json.loads(json_str)
print(data)  # 输出: {'name': 'Alice', 'age': 30}

try:
    num = int("abc")
except ValueError as e:
    print(f"Error: {e}")

try:
    num = int("G", 16)
except ValueError as e:
    print(f"Error: {e}")

import json

try:
    data = json.loads('{"name": "Alice",}')
except json.JSONDecodeError as e:
    print(f"Error: {e}")