有大佬可以帮忙看看菜鸟python入门问题吗？-灵析社区
劳资最帅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 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
0offer糕手没搞明白要干啥, 盲猜写法
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")