New install error

[Mark Fitch]

I am installing pretext-cli on a coworker's computer. After running "pip install pretextbook" I get the following error. I'm not sure where the error is occurring (which module).

$ pretext --version
Traceback (most recent call last):
  File "C:\Users\maossiandergobeille\Anaconda3\lib\runpy.py", line 197, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "C:\Users\maossiandergobeille\Anaconda3\lib\runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "C:\Users\maossiandergobeille\Anaconda3\Scripts\pretext.exe\__main__.py", line 4, in <module>
  File "C:\Users\maossiandergobeille\Anaconda3\lib\site-packages\pretext\cli.py", line 13, in <module>
    from . import utils, static, VERSION, CORE_COMMIT, core
  File "C:\Users\maossiandergobeille\Anaconda3\lib\site-packages\pretext\utils.py", line 16, in <module>
    from lxml import etree as ET
ImportError: DLL load failed while importing etree: The specified module could not be found.

--

Dr. Mark A. Fitch
Professor and Chair, Department of Mathematics & Statistics

maf...@uaa.alaska.edu
http://www.math.uaa.alaska.edu/~afmaf

SSB 154D
University of Alaska Anchorage
3211 Providence Drive, Anchorage, AK 99508

[Oscar Levin]

The error message makes it seem like lxml isn't installed correctly, which is strange since `pip install pretextbook` should require that.  Is Anaconda python the only version of python installed on the computer?

Try running `pip show lxml`, and while you are at it, `pip show pretextbook`.  Compare these to `python -m pip show lxml` and `python -m pip show pretextbook`.  Post the output here (all four if there are differences).

Oscar.

[Mark Fitch]

Both version give the same output (copied below).

$ pip show lxml
Name: lxml
Version: 4.8.0
Summary: Powerful and Pythonic XML processing library combining libxml2/libxslt with the ElementTree API.
Home-page: https://lxml.de/
Author: lxml dev team
Author-email: lxml...@lxml.de
License: BSD
Location: c:\users\maossiandergobeille\anaconda3\lib\site-packages
Requires:
Required-by: Scrapy, pretextbook, parsel

$ pip show pretextbook
Name: pretextbook
Version: 0.8.1
Summary: A package to author, build, and deploy PreTeXt projects.
Home-page:
Author: PreTeXtBook.org
Author-email: steven.clo...@gmail.com
License: GPL-3.0-or-later
Location: c:\users\maossiandergobeille\anaconda3\lib\site-packages
Requires: click, watchdog, click-logging, lxml, pdfCropMargins, ghp-import, GitPython, requests, single-version
Required-by:

$ python -m pip show lxml
Name: lxml
Version: 4.8.0
Summary: Powerful and Pythonic XML processing library combining libxml2/libxslt with the ElementTree API.
Home-page: https://lxml.de/
Author: lxml dev team
Author-email: lxml...@lxml.de
License: BSD
Location: c:\users\maossiandergobeille\anaconda3\lib\site-packages
Requires:
Required-by: Scrapy, pretextbook, parsel

$ python -m pip show pretextbook
Name: pretextbook
Version: 0.8.1
Summary: A package to author, build, and deploy PreTeXt projects.
Home-page:
Author: PreTeXtBook.org
Author-email: steven.clo...@gmail.com
License: GPL-3.0-or-later
Location: c:\users\maossiandergobeille\anaconda3\lib\site-packages
Requires: single-version, GitPython, lxml, watchdog, requests, click-logging, pdfCropMargins, click, ghp-import
Required-by:

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[Mark Fitch]

Okay, I ran

pip uninstall lxml

pip install lxml

Now pretextbook --version runs fine