如果文件不存在，请重新启动循环

Question

At the beginning of a Python loop, I want the code to test if a certain file exists in the current folder, and if it doesn't, I want it to jump out and restart the loop with the next value.

I have done this before when trying to remove a file:

try:
    os.remove('file.txt')
except os.error:
    pass

Would I need to do something similar? But instead of "pass", I would "continue"?

Obviously I am not trying to remove a file now, I just want to see if it exists. Thank you!

Answer 1

Use

os.path.exists()

for checking if your file exists.

Answer 2

You are better to just use the exception handler. If you check the file and then try to delete it, you may get an exception anyway if something else deletes the file just after you check

for filename in filenames:
    try:
        os.remove(filename)
    except os.error:
        pass

checking for existance of the filename is done like this

for filename in filenames:
    if os.path.exists(filename):
        ...