NOTE: There have been several EDITs to the question, as per comments. They are indicated below, and separated by lines.
As of now, the only remaining issue seems to be that numpy cannot load, possibly (but not certainly) due to two alternative python 3.8 systems present.
I have updated my msys2 system a couple of months ago.
That apparently included an update from python 3.7 to 3.8, but which left me with two broken pythons: I can start python when it is 3.7, but there are no associated packages, and I cannot start python when it is 3.8, which is the version holding packages.
I do not know what went wrong with that, or what did I do wrong.
I just noticed this now with the first time I mean to use python again after the upgrade.
I will describe here a sequence of steps I followed and what I found.
I will post supporting code below for clarity.
I can start python, but pandas (e.g.) and many other packages are not found in python.
Checking further, /mingw64/lib/python3.7/site-packages is essentially empty (surely emptied when upgrading to 3.8).
Looking for the pandas package, I found I have one version installed.
The pandas version is for python 3.8, surely upgraded from 3.7.
I redirected PYTHONPATH from 3.7 to 3.8
Now I cannot even start python.
EDIT Now I can start python, with some misconfiguration issues (i.e., partially fixed).
Now the question is
How can I fix python3.8, which gives the error below?
ImportError: cannot import name 'open_code' from 'io' (unknown location)
How can I fix python3.8, which gives the problems below?
New problems:
5.1. I should have python pointing to 3.8, and also fix packages.
5.2. Some modules are not found, some other are.
Note: I don't know if Msys2 upgrade breaks python2-pyqt5 has anything to do with this.
Related:
https://github.com/tox-dev/tox/issues/1334
https://github.com/yan12125/python3-android/issues/19
https://python-forum.io/Thread-Fatal-Python-error-init-sys-streams-can-t-initialize-sys-standard-streams-Attribute
TL;DR: Supporting code
pandas not found
$ python
Python 3.7.4 (default, Jul 11 2019, 10:29:54)
[GCC 9.1.0] on msys
Type "help", "copyright", "credits" or "license" for more information.
Reading /home/user1/.pythonrc
readline is in /usr/lib/python3.7/lib-dynload/readline.cpython-37m.dll
>>> import pandas
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'pandas'
>>>
pandas is actually installed
$ pacman -Sl | grep python | grep installed
mingw64 mingw-w64-x86_64-python 3.8.2-1 [installed: 3.8.1-1]
mingw64 mingw-w64-x86_64-python-apipkg 1.5-1 [installed]
...
mingw64 mingw-w64-x86_64-python-pandas 1.0.3-1 [installed: 1.0.1-1]
...
mingw64 mingw-w64-x86_64-python2-setuptools 44.1.0-1 [installed: 42.0.2-1]
msys python 3.7.4-1 [installed]
msys python2 2.7.17-1 [installed]
My pandas version is for python 3.8
$ pacman -Ql mingw-w64-x86_64-python-pandas | head -5
mingw-w64-x86_64-python-pandas /mingw64/
mingw-w64-x86_64-python-pandas /mingw64/lib/
mingw-w64-x86_64-python-pandas /mingw64/lib/python3.8/
mingw-w64-x86_64-python-pandas /mingw64/lib/python3.8/site-packages/
mingw-w64-x86_64-python-pandas /mingw64/lib/python3.8/site-packages/pandas-1.0.1-py3.8.egg-info/
I redirected PYTHONPATH from 3.7 to 3.8
Changed
export PYVERSION="3.7"
export PYTHONDIR2="${MINGW_HOME}/lib/python${PYVERSION}"
export PYTHONPATH="${PYTHONDIR2}:${PYTHONDIR2}/site-packages"
to
export PYVERSION="3.8"
...
Now I cannot even start python.
EDIT: Old problem:
$ python
Fatal Python error: init_sys_streams: can't initialize sys standard streams
Traceback (most recent call last):
File "/c/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/mingw64/lib/python3.8/io.py", line 54, in <module>
ImportError: cannot import name 'open_code' from 'io' (unknown location)
Aborted (core dumped)
New problems:
$ python --version
Python 3.7.4
$ type python
python is hashed (/usr/bin/python)
$ ls /usr/bin/python
/usr/bin/python
$ python3.8
Python 3.8.2 (default, Apr 9 2020, 13:17:39) [GCC 9.3.0 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
Reading C:/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/home/user1/.pythonrc
Module readline not available.
Traceback (most recent call last):
File "C:/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/home/user1/.pythonrc", line 42, in <module>
del os, atexit, readline, rlcompleter, save_history, historyPath
NameError: name 'readline' is not defined
>>> import readline
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'readline'
>>> import zipfile
>>> import pandas
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/mingw64/lib/python3.8/site-packages/pandas/__init__.py", line 16, in <module>
raise ImportError(
ImportError: Unable to import required dependencies:
numpy: DLL load failed while importing _ctypes: No se puede encontrar el módulo especificado.
>>> import numpy
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/mingw64/lib/python3.8/site-packages/numpy/__init__.py", line 142, in <module>
from . import core
File "C:/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/mingw64/lib/python3.8/site-packages/numpy/core/__init__.py", line 106, in <module>
from . import _dtype_ctypes
File "C:/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/mingw64/lib/python3.8/site-packages/numpy/core/_dtype_ctypes.py", line 25, in <module>
import _ctypes
ImportError: DLL load failed while importing _ctypes: No se puede encontrar el módulo especificado.
>>> exit()
Error in atexit._run_exitfuncs:
Traceback (most recent call last):
File "<frozen importlib._bootstrap>", line 991, in _find_and_load
File "<frozen importlib._bootstrap>", line 973, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'readline'
EDIT #2: Adding info as requested.
I just noticed I don't have pip. That matches the fact that I never installed any package with pip...
$ echo $PATH
/usr/local/bin:/usr/bin:/bin:/opt/bin:/c/Windows/System32:/c/Windows:/c/Windows/System32/Wbem:/c/Windows/System32/WindowsPowerShell/v1.0/:/usr/bin/site_perl:/usr/bin/vendor_perl:/usr/bin/core_perl:/c/Users/user1/OneDrive/Documents/soft-hard-ware/linux-ubuntu:/c/Users/user1/OneDrive/Documents/soft-hard-ware/linux-ubuntu/rsync:/c/Users/user1/Documents/appls_mydocs/science-math-visualization/gp524-win64-mingw_3/gnuplot/bin:/mingw64/bin
$ echo $PYTHONPATH
/c/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/mingw64/lib/python3.8:/c/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/mingw64/lib/python3.8/site-packages
$ echo $PYTHONSTARTUP
/home/user1/.pythonrc
$ which python3.8
/mingw64/bin/python3.8
$ python3.8 -m pip freeze
C:/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/mingw64/bin/python3.8.exe: No module named pip
$ python3.8 -c "import sys; print(sys.builtin_module_names)"
('_abc', '_ast', '_codecs', '_collections', '_functools', '_imp', '_io', '_locale', '_operator', '_signal', '_sre', '_stat', '_string', '_symtable', '_thread', '_tracemalloc', '_warnings', '_weakref', '_winapi', 'atexit', 'builtins', 'errno', 'faulthandler', 'gc', 'itertools', 'marshal', 'msvcrt', 'nt', 'sys', 'time', 'winreg', 'xxsubtype')
EDIT #3:
Posting as requested, plus additional info.
$ cat .pythonrc
import os
print( "Reading " + os.path.realpath(__file__) )
# enable syntax completion
try:
import readline
print( "readline is in " + readline.__file__ )
except ImportError:
print("Module readline not available.")
else:
import rlcompleter
readline.parse_and_bind("tab: complete")
# From https://docs.python.org/2/tutorial/interactive.html
# Add auto-completion and a stored history file of commands to your Python
# interactive interpreter. Requires Python 2.0+, readline. Autocomplete is
# bound to the Esc key by default (you can change it - see readline docs).
#
# Store the file in ~/.pystartup, and set an environment variable to point
# to it: "export PYTHONSTARTUP=~/.pystartup" in bash.
import atexit
import os
#import readline
#import rlcompleter
historyPath = os.path.expanduser("~/.pyhistory")
def save_history(historyPath=historyPath):
import readline
readline.write_history_file(historyPath)
if os.path.exists(historyPath):
#import readline
readline.read_history_file(historyPath)
atexit.register(save_history)
del os, atexit, readline, rlcompleter, save_history, historyPath
I don't see why which python3.8 and PYTHONPATH were out of sync:
$ cygpath -w $(which python3.8)
C:\Users\user1\Documents\appls_mydocs\PortableApps\MSYS2Portable\App\msys32\mingw64\bin\python3.8.exe
$ echo $PYTHONPATH
/c/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/mingw64/lib/python3.8:/c/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/mingw64/lib/python3.8/site-packages
$ cygpath -w /c/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/mingw64/lib/python3.8
C:\Users\user1\Documents\appls_mydocs\PortableApps\MSYS2Portable\App\msys32\mingw64\lib\python3.8
$ cygpath -w /c/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/mingw64/lib/python3.8/site-packages
C:\Users\user1\Documents\appls_mydocs\PortableApps\MSYS2Portable\App\msys32\mingw64\lib\python3.8\site-packages
$ which python
/usr/bin/python
I seem to have two incomplete/broken python installations (3.7, 3.8).
I don't know what led to an "incomplete" upgrade.
A couple of observations (see code below):
python points to 3.7
readline is available for 3.7 and not for 3.8.
I don't know why.
pandas (and many others) is available for 3.8 and not for 3.7.
Many of them won't import in 3.8 anyway, due to missing dependencies (which I guess are available in 3.7).
I don't know why.
python3.8 reports the location of .pythonrc in Windows format, while 3.7 reports it in Cygwin format.
Is that normal?
Removing PYTHONPATH does not help.
$ unset PYTHONPATH
$ python3.8
Python 3.8.2 (default, Apr 9 2020, 13:17:39) [GCC 9.3.0 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
Reading C:/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/home/user1/.pythonrc
Module readline not available.
Traceback (most recent call last):
File "C:/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/home/user1/.pythonrc", line 42, in <module>
del os, atexit, readline, rlcompleter, save_history, historyPath
NameError: name 'readline' is not defined
>>> import pandas
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/mingw64/lib/python3.8/site-packages/pandas/__init__.py", line 16, in <module>
raise ImportError(
ImportError: Unable to import required dependencies:
numpy: DLL load failed while importing _ctypes: No se puede encontrar el módulo especificado.
>>> exit()
Error in atexit._run_exitfuncs:
Traceback (most recent call last):
File "<frozen importlib._bootstrap>", line 991, in _find_and_load
File "<frozen importlib._bootstrap>", line 973, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'readline'
$ python
Python 3.7.4 (default, Jul 11 2019, 10:29:54)
[GCC 9.1.0] on msys
Type "help", "copyright", "credits" or "license" for more information.
Reading /home/user1/.pythonrc
readline is in /usr/lib/python3.7/lib-dynload/readline.cpython-37m.dll
>>> import pandas
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'pandas'
>>> exit()
EDIT #4:
I checked for all python packages, and I found something strange. It seems the basic python installation comprises two separate packages, one mingw64 and another msys.
I wouldn't know what does each one do.
$ pacman -Sl | grep "python" | grep "installed"
...
mingw64 mingw-w64-x86_64-python 3.8.2-2 [installed]
...
msys python 3.8.2-1 [installed: 3.7.4-1]
...
On one hand, there was a mismatch in installed versions mingw64 (3.8.2-2) vs msys (3.7.4-1).
On the other hand, the subversions available are not exactly the same for both (3.8.2-2) vs (3.8.2-1).
Anyway, I proceeded upgrading msys python, and this fixed things significantly.
$ pacman -S python
...
$ python
Python 3.8.2 (default, Apr 16 2020, 15:31:48)
[GCC 9.3.0] on msys
Type "help", "copyright", "credits" or "license" for more information.
Reading /home/user1/.pythonrc
Traceback (most recent call last):
File "/home/user1/.pythonrc", line 9, in <module>
import readline
File "/c/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/mingw64/lib/python3.8/site-packages/readline.py", line 6, in <module>
from pyreadline.rlmain import Readline
File "/c/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/mingw64/lib/python3.8/site-packages/pyreadline/__init__.py", line 12, in <module>
from . import logger, clipboard, lineeditor, modes, console
File "/c/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/mingw64/lib/python3.8/site-packages/pyreadline/clipboard/__init__.py", line 13, in <module>
from .win32_clipboard import GetClipboardText, SetClipboardText
File "/c/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/mingw64/lib/python3.8/site-packages/pyreadline/clipboard/win32_clipboard.py", line 37, in <module>
import ctypes.wintypes as wintypes
File "/c/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/mingw64/lib/python3.8/ctypes/wintypes.py", line 20, in <module>
class VARIANT_BOOL(ctypes._SimpleCData):
ValueError: _type_ 'v' not supported
Failed calling sys.__interactivehook__
Traceback (most recent call last):
File "/c/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/mingw64/lib/python3.8/site.py", line 412, in register_readline
import readline
File "/c/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/mingw64/lib/python3.8/site-packages/readline.py", line 6, in <module>
from pyreadline.rlmain import Readline
File "/c/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/mingw64/lib/python3.8/site-packages/pyreadline/__init__.py", line 12, in <module>
from . import logger, clipboard, lineeditor, modes, console
File "/c/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/mingw64/lib/python3.8/site-packages/pyreadline/clipboard/__init__.py", line 13, in <module>
from .win32_clipboard import GetClipboardText, SetClipboardText
File "/c/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/mingw64/lib/python3.8/site-packages/pyreadline/clipboard/win32_clipboard.py", line 37, in <module>
import ctypes.wintypes as wintypes
File "/c/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/mingw64/lib/python3.8/ctypes/wintypes.py", line 20, in <module>
class VARIANT_BOOL(ctypes._SimpleCData):
ValueError: _type_ 'v' not supported
So I have readline in 3.8 now. But there is another issue that pops up during loading of .pythonrc.
Plus, there is a problem with numpy.
It does not stem from the python version (/usr/bin/python points now to 3.8).
$ python --version
Python 3.8.2
$ python
...
>>> import numpy
Traceback (most recent call last):
File "/c/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/mingw64/lib/python3.8/site-packages/numpy/core/__init__.py", line 24, in <module>
from . import multiarray
File "/c/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/mingw64/lib/python3.8/site-packages/numpy/core/multiarray.py", line 14, in <module>
from . import overrides
File "/c/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/mingw64/lib/python3.8/site-packages/numpy/core/overrides.py", line 7, in <module>
from numpy.core._multiarray_umath import (
ModuleNotFoundError: No module named 'numpy.core._multiarray_umath'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/c/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/mingw64/lib/python3.8/site-packages/numpy/__init__.py", line 142, in <module>
from . import core
File "/c/Users/user1/Documents/appls_mydocs/PortableApps/MSYS2Portable/App/msys32/mingw64/lib/python3.8/site-packages/numpy/core/__init__.py", line 54, in <module>
raise ImportError(msg)
ImportError:
IMPORTANT: PLEASE READ THIS FOR ADVICE ON HOW TO SOLVE THIS ISSUE!
Importing the numpy c-extensions failed.
- Try uninstalling and reinstalling numpy.
- If you have already done that, then:
1. Check that you expected to use Python3.8 from "/usr/bin/python.exe",
and that you have no directories in your PATH or PYTHONPATH that can
interfere with the Python and numpy version "1.18.3" you're trying to use.
2. If (1) looks fine, you can open a new issue at
https://github.com/numpy/numpy/issues. Please include details on:
- how you installed Python
- how you installed numpy
- your operating system
- whether or not you have multiple versions of Python installed
- if you built from source, your compiler versions and ideally a build log
- If you're working with a numpy git repository, try `git clean -xdf`
(removes all files not under version control) and rebuild numpy.
Note: this error has many possible causes, so please don't comment on
an existing issue about this - open a new one instead.
Original error was: No module named 'numpy.core._multiarray_umath'
EDIT #5
As per #a_guest suggestion, and pointing me to "ValueError: _type_ 'v' not supported" error after installing PyReadline, I removed pyreadline, and this problem is gone.
Now the only remaining issue seems to be that numpy cannot load, possibly (but not certainly) due to two alternative python 3.8 systems present.
So the questions now is: Msys2: Two python installations?
The ImportError: cannot import name 'open_code' from 'io' (unknown location) comes from the fact that there are two different versions of Python conflicting with each other. python still points to the old version 3.7 but PYTHONPATH got updated to point to the new 3.8 version. As the documentation of PYTHONPATH states, it becomes prepended to the module search path and hence shadows any builtin modules:
The default search path is installation dependent, but generally begins with prefix/lib/pythonversion (see PYTHONHOME above). It is always appended to PYTHONPATH.
You can reproduce that behavior by creating two different virtual environments and then start one while having PYTHONPATH point to the other. In the following I used Miniconda to create two different environments, py37 and py38, containing a 3.7 and 3.8 installation respectively.
(py37) user#pc:~$ python --version
Python 3.7.6
(py37) user#pc:~$ PYTHONPATH=~/miniconda3/envs/py38/lib/python3.8/ python
Fatal Python error: init_sys_streams: can't initialize sys standard streams
Traceback (most recent call last):
File "/home/user/miniconda3/envs/py38/lib/python3.8/io.py", line 54, in <module>
ImportError: cannot import name 'open_code' from 'io' (unknown location)
Aborted (core dumped)
I used to use pyenv as my version manager but it had too much trouble installing packages so I'm moving over to virtualenv. So when I activate my virtual environment and write: which python I get:
/Users/kylefoley/codes/venv/bin/python
But when I actually use python it seems that it is still using pyenv. For example:
(venv) Admins-MacBook-Pro-4:~ kylefoley$ python
Python 3.8.0 (default, Nov 28 2019, 02:43:40)
[Clang 10.0.1 (clang-1001.0.46.4)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import Tk
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'Tk'
>>> import Tkinter
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'Tkinter'
>>> import tkinter
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/Users/kylefoley/.pyenv/versions/3.8.0/lib/python3.8/tkinter/__init__.py", line 36, in <module>
import _tkinter # If this fails your Python may not be configured for Tk
ModuleNotFoundError: No module named '_tkinter'
I'm not trying to fix the problem of not being able to use Tkinter rather I just want to understand why this line:
File "/Users/kylefoley/.pyenv/versions/3.8.0/lib/python3.8/tkinter/__init__.py", line 36, in <module>
is coming up.
It's because I created the virtual environment when my version management was still pyenv. If I eliminate that version management, then I do not get the file pyenv.cfg but instead get the file: pip selfcheck.json which is located in the virtual environment directory together which lib, bin and include.
I installed anaconda and below is the code which runs perfect in jupyter notebook.
from bs4 import BeautifulSoup as bs
xml = '<head><body></body></head>'
s = bs(xml,'xml')
print(s)
Output:
<?xml version="1.0" encoding="utf-8"?>
<Head><body/></Head>
But the same code if I try to run with windows command prompt throws the error below:
F:\ProgramData\Anaconda3>python testcode.py Traceback (most recent
call last): File "testcode.py", line 4, in
s = bs(xml,'xml') File "F:\ProgramData\Anaconda3\lib\site-packages\bs4__init__.py", line
198, i n init
% ",".join(features)) bs4.FeatureNotFound: Couldn't find a tree builder with the features you requeste d: xml. Do you need to install
a parser library?
I even tried to copy the script in "F:\ProgramData\Anaconda3" folder and run command prompt from here. But same error.
Note: F: is the OS drive.
How can I resolve this?
What should be the root directory (on anaconda windows) to run the python script from so that it can locate the conda packages?
Few observations on running python console from that location:
F:\ProgramData\Anaconda3>python
Python 3.7.0 (default, Jun 28 2018, 08:04:48) [MSC v.1912 64 bit (AMD64)] :: Ana
conda, Inc. on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import xml
>>> from bs4 import BeautifulSoup as bs
>>> s = bs("<head></head>","xml")
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "F:\ProgramData\Anaconda3\lib\site-packages\bs4\__init__.py", line 198, i
n __init__
% ",".join(features))
bs4.FeatureNotFound: Couldn't find a tree builder with the features you requeste
d: xml. Do you need to install a parser library?
>>> import lxml
>>> s = bs("<head></head>","lxml")
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "F:\ProgramData\Anaconda3\lib\site-packages\bs4\__init__.py", line 198, i
n __init__
% ",".join(features))
bs4.FeatureNotFound: Couldn't find a tree builder with the features you requeste
d: lxml. Do you need to install a parser library?
>>>
Update:
I installed 3.7.3 64-bit Python on fresh Windows OS from Python exe Installer, added python path to environment variables, installed bs4,lxml with pip. And now it works.
But I'd still like to know how to make the anaconda installation sufficient and enough for the python scripts running anywhere in the system.
What is missing after Anaconda installation, just the path variables or there are other things as well??
Anaconda supports multiple environments. The default environment is "base (root)". Open terminal from there and you are good to go.
If you open terminal from other environments that haven't installed the lxml library, you'll encounter the problem as mentioned in your description.
I installed Python 3.6.1. And then installed pybrain using git (See Screen Shot). Then when I useimport pybrainit works but afterwards when I usefrom pybrain.tools.shortcuts import buildNetworkit gives me error that: Python 3.6.1 (v3.6.1:69c0db5, Mar 21 2017, 17:54:52) [MSC v.1900 32 bit (Intel)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> import pybrain
>>> from pybrain.tools.shortcuts import buildNetwork
Traceback (most recent call last):
File "<pyshell#1>", line 1, in <module>
from pybrain.tools.shortcuts import buildNetwork
File "C:\Users\davm5\AppData\Local\Programs\Python\Python36-32\lib\site-packages\pybrain\tools\shortcuts.py", line 14
except ImportError, e:
SyntaxError: invalid syntax.
>>> from pybrain.structure import TanhLayer
Traceback (most recent call last):
File "<pyshell#2>", line 1, in <module>
from pybrain.structure import TanhLayer
File "C:\Users\davm5\AppData\Local\Programs\Python\Python36-32\lib\site-packages\pybrain\structure\__init__.py", line 1, in <module>
from connections.__init__ import *
ModuleNotFoundError: No module named 'connections'
Why is it doing like this? Kindly help me out here. Thanks
EDIT: Excluded screen shots. Added everything in post as per request.
except ImportError, e is Python 2 syntax and you've tried to run the code with Python 3. Install the latest version — the code seems to be fixed in git (it's except ImportError as e now, so it's suitable for both Python 2.7 and Python 3).
Just an update: I was able to resolve the issue by un-installing python, then installing python 3.6.2 (64 bit), using pip3 (pip3 install pybrain) I was able to install the latest version of pybrain which worked flawlessly. Thanks to everyone who tried to help me out when I was fairly new to python. Love this community!!
I can't seem to get WeasyPrint to work on Windows with Python 3.4 or 3.5. Has anyone been able to do this? There aren't forums at weasyprint.org and the IRC channel is dead.
I've been able to install using both Python 3.4.3 and 3.5.1. I've followed the guideline found here [1]. I've also made note that WeasyPrint's site claims it should work with Python 2.6+ or 3.1+.
When I install for Python 3.4.3 and open the Python shell and simply 'import weasyprint' I get this:
C:\Python34>python
Python 3.4.3 (v3.4.3:9b73f1c3e601, Feb 24 2015, 22:43:06) [MSC v.1600 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import weasyprint
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Python34\lib\site-packages\weasyprint\__init__.py", line 337, in <module>
from .html import find_base_url, HTML5_UA_STYLESHEET, get_html_metadata # noqa
File "C:\Python34\lib\site-packages\weasyprint\html.py", line 41, in <module>
HTML5_UA_STYLESHEET = CSS(filename=os.path.join(root, 'css', 'html5_ua.css'))
File "C:\Python34\lib\site-packages\weasyprint\__init__.py", line 224, in __init__
with result as (source_type, source, base_url, protocol_encoding):
File "C:\Python34\lib\contextlib.py", line 59, in __enter__
return next(self.gen)
File "C:\Python34\lib\site-packages\weasyprint\__init__.py", line 294, in _select_source
base_url = path2url(filename)
File "C:\Python34\lib\site-packages\weasyprint\urls.py", line 87, in path2url
path = pathname2url(path)
File "C:\Python34\lib\nturl2path.py", line 46, in pathname2url
if not ':' in p:
TypeError: 'str' does not support the buffer interface
>>>
I get a similar traceback when importing in Python 3.5.1, with the exception of the final TypeError being:
TypeError: a bytes-like object is required, not 'str'
[1] https://gist.github.com/doobeh/3188318
I had looked through the issues list at weasyprint.org and didn't find anyone else complaining about Python 3.x compatibility with WeasyPrint. Then I happened upon a pull request that did complain about just that and mirrors my difficulties exactly. So off the shelf it does not work with Python 3.x, but with a small hack it does, see [1]. I'll add some comments to the pull request and hopefully this incompatibility will get looked at.
[1] https://github.com/Kozea/WeasyPrint/pull/132