1、c,b=b+n ???c,b=b+n,c+n
2、valueError ???ValueError
例子:
def a(n):
c=0
b=1
try:
if n<100:
b,c=b+n,c+n
print(c)
print(b)
except ValueError:
print('ValueError!')
except TypeError:
print('TypeError!')
finally:
print('ok')
a('g')
a(20)
a(200)
a('Bye!')
C:\Python32>python.exe ./draft/test.py
TypeError!
ok
20
21
ok
ok
TypeError!
ok
C:\Python32>