def main():
try:
number1,number2=eval(input("please enter two number"))
result=number1/number2
except ZeroDivisionError:
print("the division is 0",result)
except SyntaxError:
print("syntax is wrong")
else:
print("ok the result is ",result)
finally:
print("i don't know")
main()
Python 3.6.1rc1 (v3.6.1rc1^0:e0fbe5feee4f9c00f09eb9659c2182183036261a, Mar 4 2017, 20:00:12) [MSC v.1900 64 bit (AMD64)] on win32
Type "copyright", "credits" or "license()" for more information.
>>>
= RESTART: C:/Users/lenovo/AppData/Local/Programs/Python/Python36/pytho2.py =
please enter two number1 3
syntax is wrong
i don't know
>>> main()
please enter two number1,2
ok the result is 0.5
i don't know
>>> main()
please enter two number
syntax is wrong
i don't know
>>> main()
please enter two number1,0
i don't know
Traceback (most recent call last):
File "C:/Users/lenovo/AppData/Local/Programs/Python/Python36/pytho2.py", line 4, in main
result=number1/number2
ZeroDivisionError: division by zero During handling of the above exception, another exception occurred: Traceback (most recent call last):
File "<pyshell#3>", line 1, in <module>
main()
File "C:/Users/lenovo/AppData/Local/Programs/Python/Python36/pytho2.py", line 6, in main
print("the division is 0",result)
UnboundLocalError: local variable 'result' referenced before assignment
>>> main()
please enter two number1.1,0.0
i don't know
Traceback (most recent call last):
File "C:/Users/lenovo/AppData/Local/Programs/Python/Python36/pytho2.py", line 4, in main
result=number1/number2
ZeroDivisionError: float division by zero During handling of the above exception, another exception occurred: Traceback (most recent call last):
File "<pyshell#4>", line 1, in <module>
main()
File "C:/Users/lenovo/AppData/Local/Programs/Python/Python36/pytho2.py", line 6, in main
print("the division is 0",result)
UnboundLocalError: local variable 'result' referenced before assignment
>>>
= RESTART: C:/Users/lenovo/AppData/Local/Programs/Python/Python36/pytho2.py =
please enter two number
1,1
ok the result is 1.0
i don't know
>>> python2.py
Traceback (most recent call last):
File "<pyshell#5>", line 1, in <module>
python2.py
NameError: name 'python2' is not defined
>>> pytho2.py
Traceback (most recent call last):
File "<pyshell#6>", line 1, in <module>
pytho2.py
NameError: name 'pytho2' is not defined
>>> main
<function main at 0x0000013B8E633E18>
>>> main()
please enter two number
1.1,0.0
i don't know
Traceback (most recent call last):
File "C:/Users/lenovo/AppData/Local/Programs/Python/Python36/pytho2.py", line 4, in main
result=number1/number2
ZeroDivisionError: float division by zero During handling of the above exception, another exception occurred: Traceback (most recent call last):
File "<pyshell#8>", line 1, in <module>
main()
File "C:/Users/lenovo/AppData/Local/Programs/Python/Python36/pytho2.py", line 6, in main
print("the division is 0")
UnboundLocalError: local variable 'result' referenced before assignment
>>>
= RESTART: C:/Users/lenovo/AppData/Local/Programs/Python/Python36/pytho2.py =
please enter two number
1,0
the division is 0
i don't know
>>>
2.
def root():
try:
print("please enter threes numbers:\n")
a,b,c=input("yes please such as(z,x,y)")
discRoot=math.sqrt(b*b-4*a*c)
root1=(-b+discRoot)/(2*a)
root2=(-b-discRoot)/(2*a)
print("the root is",root1,root2)
except ValueError:
print("\n no really root)
root()
冒号忘了，还有：eval()
修后如下：
import math
def main1():
try:
number1,number2=eval(input("please enter two number\n"))
result=number1/number2
#except ZeroDivisionError:
# print("the division is 0")
except ZeroDivisionError:
print("the division is 0")
except SyntaxError:
print("syntax is wrong")
else:
print("ok the result is ",result)
finally:
print("i don't know") def root():
try:
print("please enter threes numbers:\n")
a,b,c=eval(input("yes please such as(z,x,y):"))
print("www")
discRoot=math.sqrt(b * b - 4 * a * c)
print("hey here")
root1=(-b+discRoot)/(2*a)
root2=(-b-discRoot)/(2*a)
print("the root is",root1,root2)
except ValueError:
print("\n no really root")
root()