TypeError: unsupported operand type(s) for %: 'NoneType' and 'int'

[Lee Tim]

def IsYearLeap(yr):

if yr % 4 == 0 and (yr % 100 !=0 or yr % 400 == 0):

return True

return False

yr = print(int(input("The year is:")))

print(IsYearLeap(yr))

File "/Users/timlee/Documents/Python/Test.py", line 2, in IsYearLeap if yr % 4 == 0 and (yr % 100 !=0 or yr % 400 == 0): TypeError: unsupported operand type(s) for %: 'NoneType' and 'int'

我不獨太明白為什麼會有這個Error，請求各位大大指教這個傻傻的問題 ~~謝謝

[Albin Sun]

yr = print(....)

are u sure?

[Dincht Wu]

test = print(int(input("The year is:")))
print(type(test))

The year is:123

123
<class 'NoneType'>

以上測試的結果，yr不是int，而是NoneType，因為yr指派的是print(...)

你可能要改為

yr = int(input("The year is:"))
print(IsYearLeap(yr))

Lee Tim於 2018年11月7日星期三 UTC+8下午5時26分31秒寫道：