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'ModuleNotFoundError' after installing the packages

I am using a module for a work called cryptography and tried to install it via:
C:\Users\Administrator\Desktop>python -m pip install cryptography
Here is a copy of the cmd window:
Collecting cryptography
Using cached cryptography-3.2-cp38-cp38-win32.whl (1.3 MB)
Requirement already satisfied: six>=1.4.1 in c:\users\administrator\appdata\roaming\python\python38\site-packages (from cryptography) (1.15.0)
Requirement already satisfied: cffi!=1.11.3,>=1.8 in c:\program files (x86)\python38\lib\site-packages (from cryptography) (1.14.3)
Requirement already satisfied: pycparser in c:\program files (x86)\python38\lib\site-packages (from cffi!=1.11.3,>=1.8->cryptography) (2.20)
Installing collected packages: cryptography
Successfully installed cryptography-3.2
Then when I tried using the program it just did not work:
C:\Users\Administrator\Desktop>main.py
Traceback (most recent call last):
File "C:\Users\Administrator\Desktop\ape esse\main.py", line 3, in <module>
from cryptography.fernet import Fernet
ModuleNotFoundError: No module named 'cryptography'
It gives the same error, as if not installed, and I don't know what to do.
One of my friends said it was a problem with my python installation but I've already repaired and reinstalled it and it still gives the same error.

I installed it now using
pip install cryptography --no-cache-dir and it worked perfectly fine on python 3.8.5.
so you might want to try it.

Import error on Google colab after pip install and restarting runtime

I want to use a package (resreg) on Google Colab. I install it in my first cell
!pip install resreg
I get the following output:
Collecting resreg
Downloading https://files.pythonhosted.org/packages/61/74/0b664a8507e15507da5031fd92877d57551a7d362edc8089aa369c340e84/resreg-0.1-py3-none-any.whl
Collecting scikit-learn==0.21.0
Downloading https://files.pythonhosted.org/packages/b7/6c/ec121123c671d980c6969dfc69d0f09e1d7f88d80d373f511e61d773b85c/scikit_learn-0.21.0-cp36-cp36m-manylinux1_x86_64.whl (6.6MB)
|████████████████████████████████| 6.6MB 3.8MB/s
Requirement already satisfied: scipy>=1.0.0 in /usr/local/lib/python3.6/dist-packages (from resreg) (1.4.1)
Requirement already satisfied: pandas>=0.24.0 in /usr/local/lib/python3.6/dist-packages (from resreg) (1.0.5)
Requirement already satisfied: numpy>=1.14.0 in /usr/local/lib/python3.6/dist-packages (from resreg) (1.18.5)
Requirement already satisfied: joblib>=0.11 in /usr/local/lib/python3.6/dist-packages (from scikit-learn==0.21.0->resreg) (0.15.1)
Requirement already satisfied: python-dateutil>=2.6.1 in /usr/local/lib/python3.6/dist-packages (from pandas>=0.24.0->resreg) (2.8.1)
Requirement already satisfied: pytz>=2017.2 in /usr/local/lib/python3.6/dist-packages (from pandas>=0.24.0->resreg) (2018.9)
Requirement already satisfied: six>=1.5 in /usr/local/lib/python3.6/dist-packages (from python-dateutil>=2.6.1->pandas>=0.24.0->resreg) (1.12.0)
Installing collected packages: scikit-learn, resreg
Found existing installation: scikit-learn 0.22.2.post1
Uninstalling scikit-learn-0.22.2.post1:
Successfully uninstalled scikit-learn-0.22.2.post1
Successfully installed resreg-0.1 scikit-learn-0.21.0
Then I restart the runtime using
">Runtime >Restart Runtime"
When I try to import the package, I get the following error
from sklearn.linear_models import ElasticNet
import resreg
ModuleNotFoundError Traceback (most recent call last)
<ipython-input-1-be63596e9fde> in <module>()
1 from sklearn.linear_model import ElasticNet
---> 2 import resreg
ModuleNotFoundError: No module named 'resreg'
What could be wrong?

Try the following in different code cells:
[1]
!git clone https://github.com/jafetgado/resreg.git
!cd resreg
[2]
!pip install -e resreg
[3]
import resreg
# ... Rest of your code goes here.
If it doesn't work on the first time try to restart the kernel (go to Runtime -> Restart runtime) before running [3].
One particular thing that's worth noticing when installing resreg is that as it is noted on the stacktrace it is dependent of scikit-learn-0.21.0, and therefore you won't be able to use the new features available on the newest stable release (currently 23.0) and it's new features.
Installing collected packages: scikit-learn, resreg
Found existing installation: scikit-learn 0.22.2.post1
Uninstalling scikit-learn-0.22.2.post1:
Successfully uninstalled scikit-learn-0.22.2.post1
Running setup.py develop for resreg
Successfully installed resreg scikit-learn-0.21.0

Cannot get Twisted to work on a Mac

I am attempting to run the source code associated with the article at https://pawelmhm.github.io/python/websockets/2016/01/02/playing-with-websockets.html, but cannot get Twisted to work. I am using macOS High Sierra 10.13.5 and Python 3.6.4 (in a virtual environment).
To create the virtual environment I used:
python3 -m venv venv
. venv/bin/activate
where python3 is my system installed python 3.6.4:
$ which python3
/Library/Frameworks/Python.framework/Versions/3.6/bin/python3
I tried installing twisted using pip:
$ pip install twisted
Collecting twisted
Downloading https://files.pythonhosted.org/packages/12/2a/e9e4fb2e6b2f7a75577e0614926819a472934b0b85f205ba5d5d2add54d0/Twisted-18.4.0.tar.bz2 (3.0MB)
100% |████████████████████████████████| 3.0MB 1.9MB/s
Collecting zope.interface>=4.4.2 (from twisted)
Downloading https://files.pythonhosted.org/packages/ac/8a/657532df378c2cd2a1fe6b12be3b4097521570769d4852ec02c24bd3594e/zope.interface-4.5.0.tar.gz (151kB)
100% |████████████████████████████████| 153kB 281kB/s
Collecting constantly>=15.1 (from twisted)
Downloading https://files.pythonhosted.org/packages/b9/65/48c1909d0c0aeae6c10213340ce682db01b48ea900a7d9fce7a7910ff318/constantly-15.1.0-py2.py3-none-any.whl
Collecting incremental>=16.10.1 (from twisted)
Downloading https://files.pythonhosted.org/packages/f5/1d/c98a587dc06e107115cf4a58b49de20b19222c83d75335a192052af4c4b7/incremental-17.5.0-py2.py3-none-any.whl
Collecting Automat>=0.3.0 (from twisted)
Downloading https://files.pythonhosted.org/packages/a3/86/14c16bb98a5a3542ed8fed5d74fb064a902de3bdd98d6584b34553353c45/Automat-0.7.0-py2.py3-none-any.whl
Collecting hyperlink>=17.1.1 (from twisted)
Downloading https://files.pythonhosted.org/packages/a7/b6/84d0c863ff81e8e7de87cff3bd8fd8f1054c227ce09af1b679a8b17a9274/hyperlink-18.0.0-py2.py3-none-any.whl
Requirement already satisfied: setuptools in /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages (from zope.interface>=4.4.2->twisted) (28.8.0)
Collecting attrs>=16.1.0 (from Automat>=0.3.0->twisted)
Downloading https://files.pythonhosted.org/packages/41/59/cedf87e91ed541be7957c501a92102f9cc6363c623a7666d69d51c78ac5b/attrs-18.1.0-py2.py3-none-any.whl
Requirement already satisfied: six in /Users/sumit/Library/Python/3.6/lib/python/site-packages (from Automat>=0.3.0->twisted) (1.11.0)
Collecting idna>=2.5 (from hyperlink>=17.1.1->twisted)
Downloading https://files.pythonhosted.org/packages/4b/2a/0276479a4b3caeb8a8c1af2f8e4355746a97fab05a372e4a2c6a6b876165/idna-2.7-py2.py3-none-any.whl (58kB)
100% |████████████████████████████████| 61kB 2.8MB/s
Installing collected packages: zope.interface, constantly, incremental, attrs, Automat, idna, hyperlink, twisted
Running setup.py install for zope.interface ... done
Running setup.py install for twisted ... done
Successfully installed Automat-0.7.0 attrs-18.1.0 constantly-15.1.0 hyperlink-18.0.0 idna-2.7 incremental-17.5.0 twisted-18.4.0 zope.interface-4.5.0
But I keep getting the error:
$ python server.py
Traceback (most recent call last):
File "server.py", line 4, in <module>
from twisted.web.static import File
ModuleNotFoundError: No module named 'twisted'
Search on the web resulted in no useful resolution and attempts to use either easy_install or brew did not work too. Any suggestions are appreciated.

Thank you #9769953, that resolved the issue!
If anyone else searches for this issue (and for my future reference!), use:
python -m pip install twisted
I did have a virtual environment but apparently the python and pip combination was messing this up. Using python -m pip resolved the dependency issue.

How to install tensorflow on ubuntu (python is installed with linuxbrew)?

I got the following error when I try to install tensorflow in linux.
I'd like to install tensorflow on linux. I prefer not to use virtualenv.
https://www.tensorflow.org/install/install_linux
Does anybody know what the correct sequence of commends is to install tensorflow? Thanks.
$ pip install --upgrade tensorflow
Requirement already up-to-date: tensorflow in /home/py/.linuxbrew/lib/python2.7/site-packages
Requirement already up-to-date: mock>=2.0.0 in /home/py/.linuxbrew/lib/python2.7/site-packages (from tensorflow)
Requirement already up-to-date: tensorflow-tensorboard<0.5.0,>=0.4.0rc1 in /home/py/.linuxbrew/lib/python2.7/site-packages (from tensorflow)
Requirement already up-to-date: backports.weakref>=1.0rc1 in /home/py/.linuxbrew/lib/python2.7/site-packages (from tensorflow)
Requirement already up-to-date: wheel in /home/py/.linuxbrew/lib/python2.7/site-packages (from tensorflow)
Requirement already up-to-date: numpy>=1.12.1 in /home/py/.linuxbrew/lib/python2.7/site-packages (from tensorflow)
Collecting protobuf>=3.3.0 (from tensorflow)
Using cached protobuf-3.5.1-py2.py3-none-any.whl
Requirement already up-to-date: six>=1.10.0 in /home/py/.linuxbrew/lib/python2.7/site-packages (from tensorflow)
Requirement already up-to-date: enum34>=1.1.6 in /home/py/.linuxbrew/lib/python2.7/site-packages (from tensorflow)
Requirement already up-to-date: funcsigs>=1; python_version < "3.3" in /home/py/.linuxbrew/lib/python2.7/site-packages (from mock>=2.0.0->tensorflow)
Requirement already up-to-date: pbr>=0.11 in /home/py/.linuxbrew/lib/python2.7/site-packages (from mock>=2.0.0->tensorflow)
Requirement already up-to-date: bleach==1.5.0 in /home/py/.linuxbrew/lib/python2.7/site-packages (from tensorflow-tensorboard<0.5.0,>=0.4.0rc1->tensorflow)
Requirement already up-to-date: futures>=3.1.1; python_version < "3.2" in /home/py/.linuxbrew/lib/python2.7/site-packages (from tensorflow-tensorboard<0.5.0,>=0.4.0rc1->tensorflow)
Collecting markdown>=2.6.8 (from tensorflow-tensorboard<0.5.0,>=0.4.0rc1->tensorflow)
Requirement already up-to-date: html5lib==0.9999999 in /home/py/.linuxbrew/lib/python2.7/site-packages (from tensorflow-tensorboard<0.5.0,>=0.4.0rc1->tensorflow)
Collecting werkzeug>=0.11.10 (from tensorflow-tensorboard<0.5.0,>=0.4.0rc1->tensorflow)
Using cached Werkzeug-0.13-py2.py3-none-any.whl
Collecting setuptools (from protobuf>=3.3.0->tensorflow)
Using cached setuptools-38.2.5-py2.py3-none-any.whl
Installing collected packages: setuptools, protobuf, markdown, werkzeug
Found existing installation: setuptools 38.2.4
Uninstalling setuptools-38.2.4:
Successfully uninstalled setuptools-38.2.4
Found existing installation: protobuf 3.5.0.post1
Uninstalling protobuf-3.5.0.post1:
Successfully uninstalled protobuf-3.5.0.post1
Found existing installation: Markdown 2.6.9
Uninstalling Markdown-2.6.9:
Successfully uninstalled Markdown-2.6.9
Found existing installation: Werkzeug 0.12.2
Uninstalling Werkzeug-0.12.2:
Successfully uninstalled Werkzeug-0.12.2
Successfully installed markdown-2.6.10 protobuf-3.5.1 setuptools-38.2.5 werkzeug-0.13
$ python
Python 2.7.12 (default, Feb 3 2017, 09:33:51)
[GCC 4.8.4] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import tensorflow as tf
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/py/.linuxbrew/Cellar/python/2.7.12_3/lib/python2.7/site-packages/tensorflow/__init__.py", line 24, in <module>
from tensorflow.python import *
File "/home/py/.linuxbrew/Cellar/python/2.7.12_3/lib/python2.7/site-packages/tensorflow/python/__init__.py", line 49, in <module>
from tensorflow.python import pywrap_tensorflow
File "/home/py/.linuxbrew/Cellar/python/2.7.12_3/lib/python2.7/site-packages/tensorflow/python/pywrap_tensorflow.py", line 72, in <module>
raise ImportError(msg)
ImportError: Traceback (most recent call last):
File "/home/py/.linuxbrew/Cellar/python/2.7.12_3/lib/python2.7/site-packages/tensorflow/python/pywrap_tensorflow.py", line 58, in <module>
from tensorflow.python.pywrap_tensorflow_internal import *
File "/home/py/.linuxbrew/Cellar/python/2.7.12_3/lib/python2.7/site-packages/tensorflow/python/pywrap_tensorflow_internal.py", line 28, in <module>
_pywrap_tensorflow_internal = swig_import_helper()
File "/home/py/.linuxbrew/Cellar/python/2.7.12_3/lib/python2.7/site-packages/tensorflow/python/pywrap_tensorflow_internal.py", line 24, in swig_import_helper
_mod = imp.load_module('_pywrap_tensorflow_internal', fp, pathname, description)
ImportError: /home/py/.linuxbrew/Cellar/python/2.7.12_3/lib/python2.7/site-packages/tensorflow/python/_pywrap_tensorflow_internal.so: invalid ELF header
Failed to load the native TensorFlow runtime.
See https://www.tensorflow.org/install/install_sources#common_installation_problems
for some common reasons and solutions. Include the entire stack trace
above this error message when asking for help.
>>>

upgrade tensorflow on windows

How do I upgrade the tensoflow library on my windows machine? Tensorflow is installed currently and runs fine. I am using anaconda distribution.
import tensorflow as tf
tf.VERSION
Out[37]: '1.2.1'
My python version is below
>python -V
Python 3.5.3 :: Anaconda custom (64-bit)
---------------update 1 ------------------------------------------
Tried first answer and got below message
>pip install tensorflow --upgrade
Collecting tensorflow
Downloading tensorflow-1.3.0-cp35-cp35m-win_amd64.whl (25.5MB)
100% |################################| 25.5MB 47kB/s
Collecting protobuf>=3.3.0 (from tensorflow)
Downloading protobuf-3.4.0-py2.py3-none-any.whl (375kB)
100% |################################| 378kB 1.4MB/s
Requirement already up-to-date: numpy>=1.11.0 in c:\users\johndoe\appdata\local\conda\conda\envs\tensorflowspyder\lib\site-packages (from tensorflow)
Collecting tensorflow-tensorboard<0.2.0,>=0.1.0 (from tensorflow)
Downloading tensorflow_tensorboard-0.1.8-py3-none-any.whl (1.6MB)
100% |################################| 1.6MB 591kB/s
Requirement already up-to-date: six>=1.10.0 in c:\users\johndoe\appdata\local\conda\conda\envs\tensorflowspyder\lib\site-packages (from tensorflow)
Collecting wheel>=0.26 (from tensorflow)
Downloading wheel-0.30.0-py2.py3-none-any.whl (49kB)
100% |################################| 51kB 1.2MB/s
Collecting setuptools (from protobuf>=3.3.0->tensorflow)
Downloading setuptools-36.6.0-py2.py3-none-any.whl (481kB)
100% |################################| 481kB 1.1MB/s
Requirement already up-to-date: werkzeug>=0.11.10 in c:\users\johndoe\appdata\local\conda\conda\envs\tensorflowspyder\lib\site-packages (from tensorflow-tensorboard<0.2.0,>=0.1.0->tensorflow)
Requirement already up-to-date: bleach==1.5.0 in c:\users\johndoe\appdata\local\conda\conda\envs\tensorflowspyder\lib\site-packages (from tensorflow-tensorboard<0.2.0,>=0.1.0->tensorflow)
Collecting markdown>=2.6.8 (from tensorflow-tensorboard<0.2.0,>=0.1.0->tensorflow)
Downloading Markdown-2.6.9.tar.gz (271kB)
100% |################################| 276kB 1.5MB/s
Requirement already up-to-date: html5lib==0.9999999 in c:\users\johndoe\appdata\local\conda\conda\envs\tensorflowspyder\lib\site-packages (from tensorflow-tensorboard<0.2.0,>=0.1.0->tensorflow)
Building wheels for collected packages: markdown
Running setup.py bdist_wheel for markdown ... done
Stored in directory: C:\Users\johndoe\AppData\Local\pip\Cache\wheels\bf\46\10\c93e17ae86ae3b3a919c7b39dad3b5ccf09aeb066419e5c1e5
Successfully built markdown
Installing collected packages: setuptools, protobuf, markdown, wheel, tensorflow-tensorboard, tensorflow
Found existing installation: setuptools 36.2.0
Uninstalling setuptools-36.2.0:
Successfully uninstalled setuptools-36.2.0
Rolling back uninstall of setuptools
Exception:
Traceback (most recent call last):
File "C:\Users\johndoe\AppData\Local\conda\conda\envs\tensorflowspyder\lib\site-packages\pip\basecommand.py", line 215, in main
status = self.run(options, args)
File "C:\Users\johndoe\AppData\Local\conda\conda\envs\tensorflowspyder\lib\site-packages\pip\commands\install.py", line 342, in run
prefix=options.prefix_path,
File "C:\Users\johndoe\AppData\Local\conda\conda\envs\tensorflowspyder\lib\site-packages\pip\req\req_set.py", line 784, in install
**kwargs
File "C:\Users\johndoe\AppData\Local\conda\conda\envs\tensorflowspyder\lib\site-packages\pip\req\req_install.py", line 851, in install
self.move_wheel_files(self.source_dir, root=root, prefix=prefix)
File "C:\Users\johndoe\AppData\Local\conda\conda\envs\tensorflowspyder\lib\site-packages\pip\req\req_install.py", line 1064, in move_wheel_files
isolated=self.isolated,
File "C:\Users\johndoe\AppData\Local\conda\conda\envs\tensorflowspyder\lib\site-packages\pip\wheel.py", line 247, in move_wheel_files
prefix=prefix,
File "C:\Users\johndoe\AppData\Local\conda\conda\envs\tensorflowspyder\lib\site-packages\pip\locations.py", line 140, in distutils_scheme
d = Distribution(dist_args)
File "C:\Users\johndoe\AppData\Local\conda\conda\envs\tensorflowspyder\lib\site-packages\setuptools\dist.py", line 365, in __init__
self._finalize_requires()
File "C:\Users\johndoe\AppData\Local\conda\conda\envs\tensorflowspyder\lib\site-packages\setuptools\dist.py", line 372, in _finalize_requires
if not self.install_requires:
AttributeError: 'Distribution' object has no attribute 'install_requires'
my version is still the same
----------------update2----------------------------------
I ran the same command again and got below message
>pip install tensorflow --upgrade
Collecting tensorflow
Using cached tensorflow-1.3.0-cp35-cp35m-win_amd64.whl
Collecting tensorflow-tensorboard<0.2.0,>=0.1.0 (from tensorflow)
Using cached tensorflow_tensorboard-0.1.8-py3-none-any.whl
Requirement already up-to-date: numpy>=1.11.0 in c:\users\johndoe\appdata\local\conda\conda\envs\tensorflowspyder\lib\site-packages (from tensorflow)
Collecting protobuf>=3.3.0 (from tensorflow)
Using cached protobuf-3.4.0-py2.py3-none-any.whl
Requirement already up-to-date: six>=1.10.0 in c:\users\johndoe\appdata\local\conda\conda\envs\tensorflowspyder\lib\site-packages (from tensorflow)
Collecting wheel>=0.26 (from tensorflow)
Using cached wheel-0.30.0-py2.py3-none-any.whl
Requirement already up-to-date: html5lib==0.9999999 in c:\users\johndoe\appdata\local\conda\conda\envs\tensorflowspyder\lib\site-packages (from tensorflow-tensorboard<0.2.0,>=0.1.0->tensorflow)
Collecting markdown>=2.6.8 (from tensorflow-tensorboard<0.2.0,>=0.1.0->tensorflow)
Requirement already up-to-date: bleach==1.5.0 in c:\users\johndoe\appdata\local\conda\conda\envs\tensorflowspyder\lib\site-packages (from tensorflow-tensorboard<0.2.0,>=0.1.0->tensorflow)
Requirement already up-to-date: werkzeug>=0.11.10 in c:\users\johndoe\appdata\local\conda\conda\envs\tensorflowspyder\lib\site-packages (from tensorflow-tensorboard<0.2.0,>=0.1.0->tensorflow)
Collecting setuptools (from protobuf>=3.3.0->tensorflow)
Using cached setuptools-36.6.0-py2.py3-none-any.whl
Installing collected packages: setuptools, protobuf, markdown, wheel, tensorflow-tensorboard, tensorflow
Found existing installation: setuptools 36.2.0
Uninstalling setuptools-36.2.0:
Successfully uninstalled setuptools-36.2.0
Found existing installation: protobuf 3.3.0
Uninstalling protobuf-3.3.0:
Successfully uninstalled protobuf-3.3.0
Found existing installation: Markdown 2.6.8
Uninstalling Markdown-2.6.8:
Successfully uninstalled Markdown-2.6.8
Found existing installation: wheel 0.29.0
Uninstalling wheel-0.29.0:
Successfully uninstalled wheel-0.29.0
Found existing installation: tensorflow 1.2.1
Uninstalling tensorflow-1.2.1:
Successfully uninstalled tensorflow-1.2.1
Successfully installed markdown-2.6.9 protobuf-3.4.0 setuptools-36.6.0 tensorflow-1.3.0 tensorflow-tensorboard-0.1.8 wheel-0.30.0
i checked and it seems that tensorflow version was upgraded
tf.VERSION
Out[2]: '1.3.0'

Upgrade it like a normal package:
If tensorflow is installed in a conda environment
activate your-conda-environment
then:
pip install pip --upgrade
pip install tensorflow --upgrade
This just worked for me.

I am not allowed to post comments, so I write this as an answer.
The following worked for me:
pip install --user tensorflow --upgrade
Without "user" I got the error below, even when I run the prompt as Administrator:
ERROR: Could not install packages due to an EnvironmentError: [WinError 5] Access is denied:
Consider using the `--user` option or check the permissions.