包含字节的 dat 文件的特定代码（Python）

Question

I have another doubt related to reading the dat file.

The file format is DAT file (.dat)

The content inside the file is in bytes.

When I tried the run open file code, the program built and ran successfully. However, the python shell has no output (I can't see the contents from the file).

Since the content inside the file is in bytes, should I modify the code ? What is the code to use for bytes?

Thank you.

Answer 1

There is no "DAT" file format and, as you say, the file contains bytes - as do all files.

It's possible that the file contains binary data for which it's best to open the file in binary mode. You do that by specifying b as part of the mode parameter to open() , like this:

f = open('file.dat', 'rb')
data = f.read()    # read the entire file into data
print(data)
f.close()

Note that the full mode parameter is set to rb which means open the file in binary mode for reading.

A better way is to use with :

with open('file.dat', 'rb') as f:
    data = f.read()
    print(data)

No need to explicitly close the file.

If you know that the file contains text , possibly encoded in some specific encoding, eg UTF8, then you can specify the encoding when you open the file (Python 3):

with open('file.dat', encoding='UTF8') as f:
    for line in f:
        print(line)

In Python 2 you can use io.open() .