Questions[pipenv](ubuntu)

Note

If you’d like a requirements.txt output of the lockfile, run $ pipenv lock -r. This will include all hashes, however (which is great!). To get a requirements.txt without hashes, use $ pipenv run pip freeze.

According to the above pipenv notice, if you’d like a requirements.txt output of the lockfile, you should run $ pipenv lock -r. However, the -r options does not exist:

$ pipenv lock -r
Usage: pipenv lock [OPTIONS]
Try 'pipenv lock -h' for help.
$ pipenv lock -h
Usage: pipenv lock [OPTIONS]

  Generates Pipfile.lock.

Options:
  --categories TEXT
  --dev-only             Emit development dependencies *only* (overrides
                         --dev)
  -d, --dev              Generate both develop and default requirements  [env
                         var: PIPENV_DEV]
  --extra-pip-args TEXT
  --pre                  Allow pre-releases.
  --python TEXT          Specify which version of Python virtualenv should
                         use.
  --clear                Clears caches (pipenv, pip).  [env var: PIPENV_CLEAR]
  -q, --quiet            Quiet mode.
  -v, --verbose          Verbose mode.
  --pypi-mirror TEXT     Specify a PyPI mirror.
  -h, --help             Show this message and exit.

May I know the command to get the requirements.txt output of the pipenv lockfile?

I am getting following error while creating executing pipenv shell command:

⠋/usr/bin/python3: No module named pipenv.pew

Virtualenv location: 
Creating a Pipfile for this project…
Traceback (most recent call last):
  File "/usr/bin/pipenv", line 11, in <module>
    load_entry_point('pipenv==11.9.0', 'console_scripts', 'pipenv')()
  File "/usr/lib/python3/dist-packages/pipenv/vendor/click/core.py", line 722, in __call__
    return self.main(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/pipenv/vendor/click/core.py", line 697, in main
    rv = self.invoke(ctx)
  File "/usr/lib/python3/dist-packages/pipenv/vendor/click/core.py", line 1066, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/usr/lib/python3/dist-packages/pipenv/vendor/click/core.py", line 895, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/usr/lib/python3/dist-packages/pipenv/vendor/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/pipenv/cli.py", line 571, in shell
    core.do_shell(
  File "/usr/lib/python3/dist-packages/pipenv/core.py", line 2093, in do_shell
    ensure_project(three=three, python=python, validate=False)
  File "/usr/lib/python3/dist-packages/pipenv/core.py", line 636, in ensure_project
    ensure_pipfile(validate=validate, skip_requirements=skip_requirements)
  File "/usr/lib/python3/dist-packages/pipenv/core.py", line 289, in ensure_pipfile
    project.create_pipfile(python=python)
  File "/usr/lib/python3/dist-packages/pipenv/project.py", line 518, in create_pipfile
    'python_version': python_version(required_python)[: len('2.7')]

TypeError: 'NoneType' object is not subscriptable

For hosting on heroku I require pipenv shell.

I had a program (using module pyttsx3) written in Windows which I used to run on python3.7, and it used to run well.
But,when I try to run it on Ubuntu 20.04, it doesn't run.
I have both python3.8.2 and python3.7.7 installed on my Ubuntu 20.04 PC, running the program with python3.8.2 interpreter gives the following errors:

Traceback (most recent call last):
  File "/usr/local/lib/python3.8/dist-packages/pyttsx3/__init__.py", line 20, in init
    eng = _activeEngines[driverName]
  File "/usr/lib/python3.8/weakref.py", line 131, in __getitem__
    o = self.data[key]()
KeyError: None

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/aakash/ax-net/home/a/ax-thrusters/axon/proice.py", line 19, in <module>
    core("I am ready", "a", "b")
  File "/home/aakash/ax-net/home/a/ax-thrusters/axon/proice.py", line 17, in core
    voice.core(x, id)
  File "/home/aakash/ax-net/home/a/ax-thrusters/axon/voice.py", line 15, in core
    engine = pyttsx3.init()
  File "/usr/local/lib/python3.8/dist-packages/pyttsx3/__init__.py", line 22, in init
    eng = Engine(driverName, debug)
  File "/usr/local/lib/python3.8/dist-packages/pyttsx3/engine.py", line 30, in __init__
    self.proxy = driver.DriverProxy(weakref.proxy(self), driverName, debug)
  File "/usr/local/lib/python3.8/dist-packages/pyttsx3/driver.py", line 50, in __init__
    self._module = importlib.import_module(name)
  File "/usr/lib/python3.8/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 783, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/usr/local/lib/python3.8/dist-packages/pyttsx3/drivers/espeak.py", line 9, in <module>
    from . import _espeak, toUtf8, fromUtf8
  File "/usr/local/lib/python3.8/dist-packages/pyttsx3/drivers/_espeak.py", line 18, in <module>
    dll = cdll.LoadLibrary('libespeak.so.1')
  File "/usr/lib/python3.8/ctypes/__init__.py", line 451, in LoadLibrary
    return self._dlltype(name)
  File "/usr/lib/python3.8/ctypes/__init__.py", line 373, in __init__
    self._handle = _dlopen(self._name, mode)
OSError: libespeak.so.1: cannot open shared object file: No such file or directory

On the other hand, running it with python3.7 interpreter gives the following ModuleNotFoundError:

.
.
.
import pyttsx3
ModuleNotFoundError: No module named 'pyttsx3'

...but, when I check the installed modules using the command pip3 list, pyttsx3 shows up in the list with version: 2.87

Now, I am clueless!...dunno what to do.

UPDATE-1 (pipenv)

I tried running it with pipenv using the following commands as suggested in the answer by @ivan-borshchov :

pipenv --three
pipenv install pyttsx3
pipenv run python3 MyPythonFile.py

...but this gives the following errors which are somewhat similar to the errors I get when using python3.8.2 interpreter.

Traceback (most recent call last):
  File "/home/aakash/.local/share/virtualenvs/axon-aTooHeXl/lib/python3.8/site-packages/pyttsx3/__init__.py", line 20, in init
    eng = _activeEngines[driverName]
  File "/usr/lib/python3.8/weakref.py", line 131, in __getitem__
    o = self.data[key]()
KeyError: None

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "axon.py", line 6, in <module>
    import proice
  File "/home/aakash/ax-net/home/a/ax-thrusters/axon/proice.py", line 19, in <module>
    core("I am ready", "a", "b")
  File "/home/aakash/ax-net/home/a/ax-thrusters/axon/proice.py", line 17, in core
    voice.core(x, id)
  File "/home/aakash/ax-net/home/a/ax-thrusters/axon/voice.py", line 15, in core
    engine = pyttsx3.init()
  File "/home/aakash/.local/share/virtualenvs/axon-aTooHeXl/lib/python3.8/site-packages/pyttsx3/__init__.py", line 22, in init
    eng = Engine(driverName, debug)
  File "/home/aakash/.local/share/virtualenvs/axon-aTooHeXl/lib/python3.8/site-packages/pyttsx3/engine.py", line 30, in __init__
    self.proxy = driver.DriverProxy(weakref.proxy(self), driverName, debug)
  File "/home/aakash/.local/share/virtualenvs/axon-aTooHeXl/lib/python3.8/site-packages/pyttsx3/driver.py", line 50, in __init__
    self._module = importlib.import_module(name)
  File "/usr/lib/python3.8/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "/home/aakash/.local/share/virtualenvs/axon-aTooHeXl/lib/python3.8/site-packages/pyttsx3/drivers/espeak.py", line 9, in <module>
    from . import _espeak, toUtf8, fromUtf8
  File "/home/aakash/.local/share/virtualenvs/axon-aTooHeXl/lib/python3.8/site-packages/pyttsx3/drivers/_espeak.py", line 18, in <module>
    dll = cdll.LoadLibrary('libespeak.so.1')
  File "/usr/lib/python3.8/ctypes/__init__.py", line 451, in LoadLibrary
    return self._dlltype(name)
  File "/usr/lib/python3.8/ctypes/__init__.py", line 373, in __init__
    self._handle = _dlopen(self._name, mode)
OSError: libespeak.so.1: cannot open shared object file: No such file or directory

UPDATE-2 (pipenv run python3.7 ...)

Okay while fiddling with pipenv, I found that running python3.7 in pipenv is again giving the ModuleNotFoundError, the same as I get when running my program in python3.7 without pipenv (Even though, I have installed pyttsx3 in pipenv as mentioned in UPDATE-1 section).

So, then I am curious whether it is possible to install pyttsx3 in python3.7 in pipenv(rather than in python3, in pipenv).

I am trying to run a Pipenv python instance as root. When not run as root:

(myenv) $ python script.py

the Pipenv python is correctly used. However, when run as root with sudo:

(myenv) $ sudo python script.py

the system default python at /usr/bin/python is used instead. After some searching, I found the -E option for sudo. However, with

(myenv) $ sudo -E python script.py

it still uses /usr/bin/python, even though sudo -E echo $PATH gives the same as echo $PATH, so the -E option works fine; however, sudo -E which python continues to give /usr/bin/python! It is not a permissions or access problem because the full path to the Pipenv python works fine. Why is the wrong binary being used even though $PATH is set correctly?

I am running python 3.6 in a pipenv shell. I want to set the value of this python environment variable PYTHONASYNCIODEBUG to 1 without affecting my user environment variables that are outside of the pipenv shell. How do I make this setting?