python第五章习题

5.1字符田字格绘制

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def print_grid(width):
    # 打印上边界
    print("+" + "-" * (width * 2 - 1) + "+")
    
    # 打印中间的横线
    for _ in range(width - 1):
        print("|" + " " * (width * 2 - 2) + "|")
    
    # 打印下边界
    print("+" + "-" * (width * 2 - 1) + "+")

# 调用函数，打印一个宽度为3的田字格
print_grid(3)

5.2奇数判断

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def isOdd(n):
    if isinstance(n, int):
        return n % 2 != 0
    return False

5.3质数判断

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def isPrime(n):
    if isinstance(n, int) and n > 1:
        for i in range(2, int(n**0.5) + 1):
            if n % i == 0:
                return False
        return True
    return False

5.4质数列表

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def isPrime(n):
    if n <= 1:
        return False
    for i in range(2, int(n**0.5) + 1):
        if n % i == 0:
            return False
    return True

def PrimeList(N):
    primes = [i for i in range(2, N) if isPrime(i)]
    return ' '.join(map(str, primes))

# 调用函数，打印小于10的所有质数
print(PrimeList(10))

5.5字符质数判断

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def isNum(s):
    try:
        complex(s)
        return True
    except ValueError:
        return False

5.6数字积运算

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from functools import reduce
import operator

def multi(*args):
    return reduce(operator.mul, args, 1)

5.7斐波那契数列计算

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def FabNo(n):
    if n <= 1:
        return n
    else:
        return FabNo(n-1) + FabNo(n-2)

5.8数据类型判断

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def isType(obj):
    type_dict = {
        int: '整数',
        float: '小数',
        complex: '复数',
        str: '字符串',
        list: '列表',
        dict: '字典',
        set: '集合',
        tuple: '元组'
    }
    return type_dict.get(type(obj), '未知类型')