dbf package requires that I manually install enum34

[Travis Dart]

When I try to install the dbf package, I need to manually install enum34.

It appears that enum34 was being installed during the installation described in this other thread ( https://groups.google.com/forum/#!topic/python-dbase/XSEjkI2yvjQ ). Not sure why I have to do it manually.

Below is a reproducible error log:

$ mkvirtualenv testenv

New python executable in testenv/bin/python

Installing setuptools, pip, wheel...done.

(testenv)$ pip install -U pip

You are using pip version 7.1.0, however version 8.1.2 is available.

You should consider upgrading via the 'pip install --upgrade pip' command.

Collecting pip

  Using cached pip-8.1.2-py2.py3-none-any.whl

Installing collected packages: pip

  Found existing installation: pip 7.1.0

    Uninstalling pip-7.1.0:

      Successfully uninstalled pip-7.1.0

Successfully installed pip-8.1.2

(testenv)$ pip install dbf

Collecting dbf

  Using cached dbf-0.96.8-py2-none-any.whl

Collecting aenum (from dbf)

  Using cached aenum-1.4.5-py2-none-any.whl

Installing collected packages: aenum, dbf

Successfully installed aenum-1.4.5 dbf-0.96.8

(testenv)$ python

Python 2.7.10 (default, Oct 23 2015, 19:19:21)

[GCC 4.2.1 Compatible Apple LLVM 7.0.0 (clang-700.0.59.5)] on darwin

Type "help", "copyright", "credits" or "license" for more information.

>>> import dbf

Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

  File "/Users/oscargarcia/.virtualenvs/testenv/lib/python2.7/site-packages/dbf/__init__.py", line 11, in <module>

    from dbf import ver_2 as _dbf

  File "/Users/oscargarcia/.virtualenvs/testenv/lib/python2.7/site-packages/dbf/ver_2.py", line 49, in <module>

    from enum import Enum, IntEnum

ImportError: No module named enum

>>> ^D

(testenv)$ pip install enum34

Collecting enum34

  Downloading enum34-1.1.6-py2-none-any.whl

Installing collected packages: enum34

Successfully installed enum34-1.1.6

(testenv)$ python

Python 2.7.10 (default, Oct 23 2015, 19:19:21)

[GCC 4.2.1 Compatible Apple LLVM 7.0.0 (clang-700.0.59.5)] on darwin

Type "help", "copyright", "credits" or "license" for more information.

>>> import dbf

>>>

>>> ^D

(testenv)$

[Adrian Klaver]

Well the first thing I would do is not use the cached wheels.

After uninstalling try running the install with -no-cache-dir:

https://pip.pypa.io/en/stable/reference/pip/?highlight=no-cache-dir#cmdoption--no-cache-dir

The requirement is in setup.py:

if sys.version_info[:2] < (3, 4):
requirements = ['enum34']
else:
requirements = []

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Adrian Klaver
adrian...@aklaver.com

[Travis Dart]

I tried that, but it still doesn't work.

These are the commands I tried. I also had this issue on another computer.

mkvirtualenv testenv

pip install -U pip

pip install --no-cache-dir dbf

python -c "import dbf"

# returns 1

echo $?

pip install enum34

python -c "import dbf"

# returns 0

echo $?

deactivate

rmvirtualenv testenv

> <mailto:python-dbase+unsub...@googlegroups.com>.

[Adrian Klaver]

On 08/02/2016 11:37 AM, Travis Dart wrote:
> I tried that, but it still doesn't work.
>
> These are the commands I tried. I also had this issue on another computer.
>
> mkvirtualenv testenv
> pip install -U pip
> pip install --no-cache-dir dbf
> python -c "import dbf"
> # returns 1
> echo $?
> pip install enum34
> python -c "import dbf"
> # returns 0
> echo $?
> deactivate
> rmvirtualenv testenv
>
>

Got to be changes in how setuptools works. If I:

Comment out:


#if sys.version_info[:2] < (3, 4):
# requirements = ['enum34']
#else:
# requirements = []

and then add enum34 to install_requires I can build an sdist that when
I pip install pulls in enum34.

I will have to do some more digging on this, but I believe this is
something Ethan is going to have to do on his end to get the packages
from PyPi to work.


--
Adrian Klaver
adrian...@aklaver.com

[Adrian Klaver]

Aah found the magic incantation here:

http://stackoverflow.com/questions/21082091/install-requires-based-on-python-version

So:

try:
import setuptools
except ImportError:
pass
from distutils.core import setup
from glob import glob
import os
import sys

#html_docs = glob('dbf/html/*')

long_desc="""
Currently supports dBase III, Clipper, FoxPro, and Visual FoxPro tables.
Text is returned as unicode, and codepage settings in tables are
honored. Memos and Null fields are supported. Documentation needs work,
but author is very responsive to e-mails.

Not supported: index files (but can create tempory non-file indexes),
auto-incrementing fields, and Varchar fields.

Installation: `pip install dbf`

There may be messages about byte-compiling failures -- you can safely
ignore them (this is a multi-version release, and 2 and 3 don't like
some of each other's code).

"""

#if sys.version_info[:2] < (3, 4):
# requirements = ['enum34']
#else:
# requirements = []

py2_only = ('dbf/ver_2.py', )
py3_only = ('dbf/ver_32.py', 'dbf/ver_33.py')
make = []

data = dict(
name='dbf',
version='0.96.8',
license='BSD License',
description='Pure python package for reading/writing dBase,
FoxPro, and Visual FoxPro .dbf files (including memos)',
long_description=long_desc,
url='https://pypi.python.org/pypi/dbf',
packages=['dbf', ],
provides=['dbf'],
install_requires=['aenum'],
extras_require={':python_version < "3.4"': ["enum34"],},
author='Ethan Furman',
author_email='et...@stoneleaf.us',
classifiers=[
'Development Status :: 4 - Beta',
'Intended Audience :: Developers',
'License :: OSI Approved :: BSD License',
'Programming Language :: Python',
'Topic :: Database',
'Programming Language :: Python :: 2.7',
'Programming Language :: Python :: 3.3',
'Programming Language :: Python :: 3.4',
'Programming Language :: Python :: 3.5',
],
)

if __name__ == '__main__':
setup(**data)


>
>


--
Adrian Klaver
adrian...@aklaver.com

[Ethan Furman]

On 08/02/2016 10:28 AM, Travis Dart wrote:

> When I try to install the dbf package, I need to manually install enum34.

Totally my fault. Thanks for tracking that down, Adrian.

--
~Ethan~