def handle_exception(e): code = 500 if isinstance(e, Exception) else e.code return jsonify(error=str(e)), code @app.route("/api/risky") def risky_api(): try: # ... except SomeError as se: raise ApiException(se.
归根结底一句话,异常(Exception)让程序员大致上可以忽略罕见的情况,并避免编写那些(烦人的但又不得不写的)错误检查代码。//英文原文如下: Because control jumps immediately to a handler when an exception occurs, there's no need to instrument all your code to guard for errors. Moreover, because Python...
View Code # 此示例示意异常处理语句try-except 的语法和用法 def div_apple(n): print("%d个苹果你想分给几个人?" % n) s = input("请输入人数: ") cnt = int(s) # 可能触发ValueError类型的错误 result = n / cnt # 可能触发ZeroDivistion类型的错误 print('每个人分了', result, '个苹果') ...
error_code=9902: 表示xxx服务器出现异常 """ code=500 classSuccess(APIException): code=200 message='success' error_code=0 我们这里创建了三个基于APIException(我们自己创建的异常基类),我们在类上就已经定义好了code(HTTP状态码),因此在抛出此异常时我们只用传递data,message等参数即可(Success什么都不用传)...
exception subprocess.CalledProcessError SubprocessError的子类,当check_call()或check_output()运行的进程退出时,返回非0值时抛出。 returncode 子进程的退出状态 cmd 用于衍生子进程的命令。 output 如果异常由check_output抛出,则存放子进程的输出。否则None ...
[except Exception as result: #打印错误信息] [else: #没有异常才会执行的代码] [finally: #无论是否有异常,都会执行的代码] 在有return的情况下 Python-try except else finally有return时执行顺序探究 没有return 语句的情况 print 'this is a test of code path in try...except...else...finally' ...
fileinfo = os.stat(fileName) file_size = int(fileinfo.st_size)/1024 return file_size except Exception as reason: print_ztp_log(f"Get file size failed. reason = {reason}", LOG_ERROR_TYPE) return file_size def get_file_size(file_path=''): """Return the size of a file in the ...
return self.message def divide(a, b): if b == 0: raise CustomException("除数不能...
importarcpyimportsystry:# Execute the Buffer tool#arcpy.Buffer_analysis("c:/transport/roads.shp","c:/transport/roads_buffer.shp")exceptException:e=sys.exc_info()[1]print(e.args[0])# If using this code within a script tool, AddError can be used to return messages# back to a script ...
the unusual cases and avoid error-checking code. 1. Why Use Exceptions? 为什么使用异常 In a nutshell, exceptions let us jump out of arbitrarily large chunks of a program. 简而言之,异常让我们从一个程序中任意大的代码块中跳将出来。 2. Exception Roles 异常充当的最常见的几种角色 ...