NameError: name 'variable_name" is not defined when i try to catch an execption
NameError: name 'variable_name" is not defined when i try to catch an execption
您好,我正在尝试创建一个程序来读取两个 txt.files 并在控制台上为用户显示它们。
我想为至少一个文件不在同一目录中的情况编写一个例外。
我现在显示的代码适用于两个文件都在目录中的情况。
但是,当我尝试测试我的异常时,我得到 NameError =“list_of_cats”未找到的回溯错误,然后显示我的自定义消息。
我应该如何编写程序才能显示我的 custom_message。
filename_1 = "cats.txt"
filename_2 = "dogs.txt"
try:
with open(filename_1) as file_object_1, open(filename_2) as file_object_2:
list_of_cats = file_object_1.read()
list_of_dogs = file_object_2.read()
except FileNotFoundError:
print(f"Sorry one of the files {filename_2} is not in this directory")
print(list_of_cats)
print(list_of_dogs)
这是错误信息:
NameError: name 'list_of_cats' is not defined
Sorry one of the files dogs.txt is not in this directory
Process finished with exit code 1
错误发生是因为打印时变量list_of_cats
和list_of_dogs
在打印时没有定义。要解决此问题,您可以使用以下代码:
filename_1 = "cats.txt"
filename_2 = "dogs.txt"
try:
with open(filename_1) as file_object_1, open(filename_2) as file_object_2:
list_of_cats = file_object_1.read()
list_of_dogs = file_object_2.read()
except FileNotFoundError:
print(f"Sorry one of the files {filename_2} is not in this directory")
else:
print(list_of_cats)
print(list_of_dogs)
您好,我正在尝试创建一个程序来读取两个 txt.files 并在控制台上为用户显示它们。
我想为至少一个文件不在同一目录中的情况编写一个例外。
我现在显示的代码适用于两个文件都在目录中的情况。 但是,当我尝试测试我的异常时,我得到 NameError =“list_of_cats”未找到的回溯错误,然后显示我的自定义消息。
我应该如何编写程序才能显示我的 custom_message。
filename_1 = "cats.txt"
filename_2 = "dogs.txt"
try:
with open(filename_1) as file_object_1, open(filename_2) as file_object_2:
list_of_cats = file_object_1.read()
list_of_dogs = file_object_2.read()
except FileNotFoundError:
print(f"Sorry one of the files {filename_2} is not in this directory")
print(list_of_cats)
print(list_of_dogs)
这是错误信息:
NameError: name 'list_of_cats' is not defined
Sorry one of the files dogs.txt is not in this directory
Process finished with exit code 1
错误发生是因为打印时变量list_of_cats
和list_of_dogs
在打印时没有定义。要解决此问题,您可以使用以下代码:
filename_1 = "cats.txt"
filename_2 = "dogs.txt"
try:
with open(filename_1) as file_object_1, open(filename_2) as file_object_2:
list_of_cats = file_object_1.read()
list_of_dogs = file_object_2.read()
except FileNotFoundError:
print(f"Sorry one of the files {filename_2} is not in this directory")
else:
print(list_of_cats)
print(list_of_dogs)