This is being handled in: - #520

The Windows aspect is a red herring: OP's sample above produces the same error on Linux. (Though I don't know what's going on with the CI).

The same error can also be obtained by passing an io from a file opened in non-binary mode ('r' as opposed to 'rb') to rows_from_file(). This is how I got here.

The fix for my case is easy: open the file in mode 'rb'. The analagous fix for OP's problem also works: use BytesIO in place of StringIO.

Minimal test case (derived from utils.py):

``` python import io from typing import cast

fp = io.StringIO("id,name\n1,Cleo") # error

fp = io.BytesIO(bytes("id,name\n1,Cleo", encoding='utf-8')) # okay reader = io.BufferedReader(cast(io.RawIOBase, fp)) reader.peek(1) # exception thrown here `` I see the signature ofrows_from_file()correctly hasfp: BinaryIObut I guess you'd need either a runtime type check for that (not allios havemode()), or to catch theAttributeErroronpeek()` to produce a better error for users. Neither option is ideal.

Some thoughts on testing binary-ness of ios in this SO question: https://stackoverflow.com/questions/44584829/how-to-determine-if-file-is-opened-in-binary-or-text-mode

This is very strange. GitHub Actions CI here runs against Windows and installs OK.

Marking this as "Help wanted" to see if anyone can figure out what's going on here.

log.txt

Attempted to test on a machine with a new version of Python, but install failed with an error message for the 'click' package.

``` C:\WINDOWS\system32>"c:\Program Files\Python310\python.exe" Python 3.10.2 (tags/v3.10.2:a58ebcc, Jan 17 2022, 14:12:15) [MSC v.1929 64 bit (AMD64)] on win32 Type "help", "copyright", "credits" or "license" for more information.

quit()

C:\WINDOWS\system32>cd C:\Users\swood\Downloads\sqlite-utils-main-20220621\sqlite-utils-main

C:\Users\swood\Downloads\sqlite-utils-main-20220621\sqlite-utils-main>"c:\Program Files\Python310\python.exe" setup.py install running install running bdist_egg running egg_info

...

Installed c:\program files\python310\lib\site-packages\click_default_group_wheel-1.2.2-py3.10.egg Searching for click Downloading https://files.pythonhosted.org/packages/3d/da/f3bbf30f7e71d881585d598f67f4424b2cc4c68f39849542e81183218017/click-default-group-wheel-1.2.2.tar.gz#sha256=e90da42d92c03e88a12ed0c0b69c8a29afb5d36e3dc8d29c423ba4219e6d7747 Best match: click default-group-wheel-1.2.2 Processing click-default-group-wheel-1.2.2.tar.gz Writing C:\Users\swood\AppData\Local\Temp\easy_install-aiaj0_eh\click-default-group-wheel-1.2.2\setup.cfg Running click-default-group-wheel-1.2.2\setup.py -q bdist_egg --dist-dir C:\Users\swood\AppData\Local\Temp\easy_install-aiaj0_eh\click-default-group-wheel-1.2.2\egg-dist-tmp-z61a4h8n zip_safe flag not set; analyzing archive contents... removing 'c:\program files\python310\lib\site-packages\click_default_group_wheel-1.2.2-py3.10.egg' (and everything under it) Copying click_default_group_wheel-1.2.2-py3.10.egg to c:\program files\python310\lib\site-packages click-default-group-wheel 1.2.2 is already the active version in easy-install.pth

Installed c:\program files\python310\lib\site-packages\click_default_group_wheel-1.2.2-py3.10.egg error: The 'click' distribution was not found and is required by click-default-group-wheel, sqlite-utils ```