# Test your program with the following:
# Case 1: When the user inputs 84, the program should delete the file 84.txt
# Case 2: When the user inputs 84 (again), the program should print a File Not Found error message
# Case 3: When the user inputs 5, the program should delete the file 5.txt
#TODO: Your code goes here
def FileDel(x):
path = "/home/nbuser/library/parent_dir/files_exercises"
ls = os.listdir(path)
for i in ls:
if x==i:
os.remove(i)
print(x,"removed")
elif x.isdigit():
x1=x+".txt"
if x1==i:
os.remove(i)
print(x1,"removed")
else:
try:
os.remove(i)
except FileNotFoundError as exception_object:
print("Cannot find file: ", exception_object)
except PermissionError as exception_object:
print("Cannot delete a directory: ", exception_object)
except Exception as exception_object:
print("Unexpected exception: ", exception_object)
c_path = os.path.join(path, i)
x=input("enter a file no. that you want to del,e.g. 5 or 5.txt: ")
FileDel(x)
enter a file no. that you want to del,e.g. 5 or 5.txt: 88
88.txt removed
Unexpected exception: [Errno 21] Is a directory: 'dir_1'
上面的说明要求首先删除文件,然后第二次删除相同文件时,返回未找到的文件。但是,我的代码第一次将所有内容一起打印,对于第二次删除,它将打印:
enter a file no. that you want to del,e.g. 5 or 5.txt: 88
Unexpected exception: [Errno 21] Is a directory: 'dir_1'
请帮忙!
我将以稍微不同的方式编写代码:
def FileDel(x):
path = "/home/nbuser/library/parent_dir/files_exercises"
ls = os.listdir(path)
try:
if str(x).isdigit():
os.remove(path + '\\' + str(x) + ".txt")
print(x, "removed")
else:
os.remove(path + '\\' + str(x) )
print(x, "removed")
except OSError as exception_object:
print("Cannot find file: ", exception_object)
except PermissionError as exception_object:
print("Cannot delete a directory: ", exception_object)
except Exception as exception_object:
print("Unexpected exception: ", exception_object)
c_path = os.path.join(path, i)
x=raw_input("enter a file no. that you want to del,e.g. 5 or 5.txt: ")
FileDel(x)
无论如何os.path.exists(path)
,您都可以使用它来提前告诉您路径/文件是否存在
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