Python open() 给出“FileNotFoundError: [Errno 2] No such file or directory:”，但文件存在

Question

I'm trying to read all the files in a directory and append the text in them into a list but I get the error in the header. However, the file actually exists. My code is:

pos_lines = []
train_pos_path = r'C:\Users\Halid\Desktop\nlp_p5\nlp_dir2\TRAIN\posTr'
# print(os.listdir(train_pos_path))
for filename in os.listdir(train_pos_path):
    with open(filename, "r",encoding="utf-8", errors='ignore') as f:
        for line in f.readlines():
            pos_lines.append(line)

The path is the absolute path of the directory and print(os.listdir(train_pos_path)) gives the list of the files under that directory. However, I can't open the files in it and it gives me the error I mentioned. My code I'm trying to run is in "C:\Users\Halid\Desktop\nlp_p5" . Does anybody know why I'm getting this error and how can I solve this?

Answer 1

You've specified an absolute path to the directory, r'C:\Users\Halid\Desktop\nlp_p5\nlp_dir2\TRAIN\posTr' . You then proceeded to list all files with their filenames, receiving A , B , C , ...

However, A , B , C , ... are not located in the directory you're running your python script. Try calling

os.chdir(train_pos_path)

before calling the for loop .

Another solution would be to prepend each path with train_pos_path :

train_pos_path = r'C:\Users\Halid\Desktop\nlp_p5\nlp_dir2\TRAIN\posTr'

for filename in os.listdir(train_pos_path):
    with open(os.path.join(train_pos_path, filename), "r",encoding="utf-8", errors='ignore') as f:
        for line in f.readlines():
            pos_lines.append(line)

The key takeaway from this is the fact that os.listdir(directory) returns just the names as seen from the directory , not their absolute paths.