CODEWITHSUNDEEP
pythonpython-3.x
user994165
user994165

Reputation: 9512

AttributeError: '_io.TextIOWrapper' object has no attribute 'content_length'

I'm runing Python 3.6.8 and trying to read the size of a text file, but I get the error "AttributeError: '_io.TextIOWrapper' object has no attribute 'content_length'". The get_file_object_size function works when I pass it a file posted in an HTTP multipart/form-data post (using Flask), but when I try to read a text file directly from the file system, I get the error.

setup/db_setup.py:

file_path = 'myfile.txt'
# Generates the error
get_file_size_by_file_path(file_path)

setup/../utils/files.py:

def get_file_object_size(fobj):
    if fobj.content_length:
        return fobj.content_length

    try:
        pos = fobj.tell()
        fobj.seek(0, 2)  #seek to end
        size = fobj.tell()
        fobj.seek(pos)  # back to original position
        return size
    except (AttributeError, IOError):
        pass

    # in-memory file object that doesn't support seeking or tell
    return 0  #assume small enough


def get_file_size_by_file_path(file_path):
    with open(file_path) as file:
        return get_file_object_size(file)

generates error:

Traceback (most recent call last):
  File "setup/db_setup.py", line 76, in main
    ins, file_uri='myfile.txt', type=1, file_size=get_file_size_by_file_path(file_path))
  File "setup/../utils/files.py", line 20, in get_file_size_by_file_path
    return get_file_object_size(file)
  File "setup/../utils/files.py", line 2, in get_file_object_size
    if fobj.content_length:
AttributeError: '_io.TextIOWrapper' object has no attribute 'content_length'

Upvotes: 0

Views: 975

Answers (1)

b_c
b_c

Reputation: 1212

When you're using flask, I suspect your "file" comes in as a flask.Request object, which does have the property content_length.

When you pass it a (open) local file, it's of type _io.TextIOWrapper, which as you can see from the exception, does not have a content_length property/attribute.

If you want to check the size of a local file, you'll need to go about it differently. The .stat() method from either the os or pathlib module can help with that:

>>> from pathlib import Path
>>> Path('file.txt').stat().st_size
19

>>> import os
>>> os.stat('file.txt').st_size
19

Upvotes: 4

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