使用异常处理防止系统崩溃时出现的几行
使用异常处理防止系统崩溃时出现的几行
提问于 2020-04-29 17:37:52
我正在尝试使用异常处理来防止我的系统崩溃，我使用了下面的代码，而这个csv文件实际上并不存在。但是这个系统一直在给我答案。谁能帮我纠正我的代码please....help我
以下是我的源代码：
while True:
try:
import pandas as pd # data processing, csv file I/O(e.g pd.read_csv)
df = pd.read_csv('C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv')
print(df)
except Exception as err:
print("Uh oh, please send me this message: '{}'" .format(err))结果：
Uh oh, please send me this message: '[Errno 2] File b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv' does not exist: b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv''
Uh oh, please send me this message: '[Errno 2] File b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv' does not exist: b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv''
Uh oh, please send me this message: '[Errno 2] File b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv' does not exist: b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv''
Uh oh, please send me this message: '[Errno 2] File b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv' does not exist: b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv''
Uh oh, please send me this message: '[Errno 2] File b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv' does not exist: b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv''
Uh oh, please send me this message: '[Errno 2] File b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv' does not exist: b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv''
Uh oh, please send me this message: '[Errno 2] File b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv' does not exist: b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv''
Uh oh, please send me this message: '[Errno 2] File b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv' does not exist: b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv''
Uh oh, please send me this message: '[Errno 2] File b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv' does not exist: b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv''
Uh oh, please send me this message: '[Errno 2] File b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv' does not exist: b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv''
Uh oh, please send me this message: '[Errno 2] File b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv' does not exist: b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv''
Uh oh, please send me this message: '[Errno 2] File b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv' does not exist: b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv''
Uh oh, please send me this message: '[Errno 2] File b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv' does not exist: b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv''
Uh oh, please send me this message: '[Errno 2] File b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv' does not exist: b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv''
Uh oh, please send me this message: '[Errno 2] File b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv' does not exist: b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv''
Uh oh, please send me this message: '[Errno 2] File b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv' does not exist: b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv''
Uh oh, please send me this message: '[Errno 2] File b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv' does not exist: b'C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv''
..................回答 1
Stack Overflow用户
发布于 2020-04-29 17:43:48
捕获预期意味着您的系统不会以适当的错误代码退出。相反，它执行您放在异常行中的任何操作，并继续执行您的代码。从docs
如果在执行try子句期间发生异常，则跳过子句的其余部分。然后，如果它的类型与以except关键字命名的异常匹配，则执行except子句，然后在try语句之后继续执行。
这就是为什么您从不离开while循环的原因。这是对循环的快速修复：
while True:
try:
import pandas as pd # data processing, csv file I/O(e.g pd.read_csv)
df = pd.read_csv('C:/Users/User/Desktop/Coding/parsehubjsonfileeg/assd.csv')
print(df)
except Exception as err:
print("Uh oh, please send me this message: '{}'" .format(err))
break进一步的调整取决于您在未找到csv时要执行的操作。
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原文链接：
https://stackoverflow.com/questions/61498705
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