有大佬可以帮忙看看菜鸟python入门问题吗？

Z时代
2024-03-14
分类：IT

def is_integer_string(s):
    if not s.isdigit() and s[0]!='-':
        return False  
    return int(s)==s 
def print_hourglass(n,sym):
    i=1
    while n>=i**2:
        print(''*(i-1)+sym*i*2)
        print(''*(i-1)+sym*(i+1)*2)
        i+=2
    while i>0:
        print(''*(i-1)+sym*i*2)
        i-=2
    print(n-i**2)
n=is_integer_string(input())
try:
    n,sym=map(int,input().split())
except ValueError:
    print("请输入一个数字")print(print_hourglass(n,sym))

这串代码后

Traceback (most recent call last):
  File "/tmp/a.py", line 20, in <module>
    print(print_hourglass(n,sym))NameError: name 'sym' is not defined. Did you mean: 'sum'?

这个sym的变量我该怎么修改

回答：

没搞明白要干啥, 盲猜写法

python">def is_integer_string(s):
    if not s.isdigit() and (s[0] != '-' or not s[1:].isdigit()):
        return False
    return True
def print_hourglass(n, sym):
    i = 1
    while n >= i * i:
        print(' ' * (i - 1) + sym * (i * 2))
        print(' ' * (i - 1) + sym * ((i + 1) * 2))
        i += 2
    while i > 0:
        print(' ' * (i - 1) + sym * (i * 2))
        i -= 2
try:
    n = input()
    if is_integer_string(n):
        n = int(n)
        sym = input()
        print_hourglass(n, sym)
    else:
        print("请输入一个整数")
except ValueError:
    print("请输入一个整数")