Python Errors and Exceptions
1. python中的try{}catch{}2. raise exception
3. try...except ... else..
4. finally块
1. python中的try{}catch{} python中的异常处理的关键字和c#中的是不相同的，python中使用try，except关键在来处理异常，如下：
def dive(x, y):
try:
result = x / y;
except ZeroDivisionError as z :
print("division by zero.", z);
else:
print("the result is ", result);
finally:
print("executing finally caluse.");
2. raise excepption
python中如果在except中如果需要将异常重新抛出可以使用关键字raise，类似于c#中的throw关键字。
def raise_test():
try:
result = 1 / 0;
except ZeroDivisionError :
print ("can not process the exception, to throw ...");
raise;
finally:
print("in finally block");
raise_test();
3. try...except ... else..
It is useful for code that must be executed if the try clause does not raise an exception else块是说如果异常没有被抛出的情况下将被执行。
4. finally块
A finally clauseis always executed before leaving thetrystatement finally块是一定会被执行的，不论异常是否产生。
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