No module named serial - python

and I got a question when I run my Python code.
I installed Python 2.7 on Windows 7, bit 64.
I got an error "No module named serial" when I compiled my code:
import serial
ser = serial.Serial("COM5", 9600)
ser.write("Hello world")
x = ser.readline()
print(x)
I tried many ways to crack this problem, such as installed Canopy to setup virtual environment, make sure 'pip' is there, no Python v 3.x installed.
But still cannot get it out.
Any advice would be appreciated.

Serial is not included with Python. It is a package that you'll need to install separately.
Since you have pip installed you can install serial from the command line with:
pip install pyserial
Or, you can use a Windows installer from here. It looks like you're using Python 3 so click the installer for Python 3.
Then you should be able to import serial as you tried before.

You must pip install pyserial first.

First use command
pip uninstall pyserial
Then run again
pip install pyserial
The above commands will index it with system interpreter.

You must have the pyserial library installed. You do not need the serial library.Therefore, if the serial library is pre-installed, uninstall it. Install the pyserial libray. There are many methods of installing:-
pip install pyserial
Download zip from pyserial and save extracted library in Lib>>site-packages folder of Python.
Download wheel and install wheel using command: pip install <wheelname>
Link: https://github.com/pyserial/pyserial/releases
After installing Pyserial, Navigate to the location where pyserial is installed. You will see a "setup.py" file. Open Power Shell or CMD in the same directory and run command "python setup.py install".
Now you can use all functionalities of pyserial library without any error.

In my case the command below did the job
pip3 install pyserial

sudo apt install python-serial python3-serial
Solved it, using it for esp32

Download this file :- (https://pypi.python.org/packages/1f/3b/ee6f354bcb1e28a7cd735be98f39ecf80554948284b41e9f7965951befa6/pyserial-3.2.1.tar.gz#md5=7142a421c8b35d2dac6c47c254db023d):
cd /opt
sudo tar -xvf ~/Downloads/pyserial-3.2.1.tar.gz -C .
cd /opt/pyserial-3.2.1
sudo python setup.py install

Firstly uninstall pyserial using the command pip uninstall pyserial
Then go to https://www.lfd.uci.edu/~gohlke/pythonlibs/
download the suitable pyserial version and then go to the
directory where the file is downloaded and open cmd there
then type pip install "filename"(without quotes)

I had this same problem multiple times but finally found solution.
I had multiple Python versions installed. Like in Raspberry Pi there was Python3.5 installed and I installed also 3.9.2 without uninstalling 3.5. Then I installed pyserial with pip and tried my program. No module... But the reason was that the linux symbolic link in python3 pointed to python3.9.2 version but pip3 pointed to python3.5. So pyserial was installed in python3.5 and understandably was not found when run python3.9.2. Then I changed symbolic link in pip3 to right version and voila, everything works fine!

Happened to me. Something was broken. All the solutions presented didn't work.
sudo pip install serial
Requirement already satisfied: serial in /usr/local/lib/python3.8/dist-packages (0.0.97)
sudo pip3 install serial
Requirement already satisfied: serial in /usr/local/lib/python3.8/dist-packages (0.0.97)
Same for pyserial, it was already installed.
Solution: I replaced the symbolic link /usr/bin/python to use python3 instead of python2.

Usually what can happen as was in my case is installing a newer version manually can change the placement of the pyserial from minimal to the upgraded version.
For example, I had just installed Python 3.10 before installing Arduino IDE and that just caused a heck of problems.
I uninstalled pyserial by trying pip uninstall and then
I uninstalled python3.10,
sudo apt purge python3.10
Which after a reboot later, I installed pip install pyserial again, and that did the trick.

Related

Unable to install pandas or other packages in linux virtual environment

I am unable to install module pandas in my linux vm. I tried all ways to install it, but it says it has version 1.1.5 requirement already satistied. But when I try running the code, it says, no module found. The latest version of python in it is 2.7.3, but I want to install 3.8 or 3.7, but I'm unable to. Where am I going wrong?
Did you try installing python3 from your package manager? You can install python 3.9 from apt using the below command
apt install python3 pip -y
You can also install the below package to use python in the terminal instead of python3 every time
apt install python-is-python3 -y
I cant comment yet so using the answer section, kindly give me an upvote so I can start using the comment feature, sorry for the trouble

pip doesn't work for me (I have python 3.9.7 installed) (Windows)

So, I have python 3.9.7 installed.
When I installed it, pip had also been installed.
I checked if python is installed (Windows) using "python --version".
The Problem: When I try the same with pip; "pip --version",
an error occurs saying that the program can't be executed (command prompt)
Does anyone know why?
You can try to reinstall pip. This my solve the issue. Use can either install it over command window with 'py -m ensurepip --upgrade' oder download the 'get-pip.py' file (check https://pip.pypa.io/en/stable/installation/).
Try this first
Did you added python to PATH? This is also important. Check https://datatofish.com/add-python-to-windows-path/ to do so
Make sure that the python version is the version of your intent.
Windows python installer sometimes defaults to py for newer python installations.
python --version
Then try to install for example openpyxl package, with admin access, if required
python -m pip install openpyxl
Have you already tried pip3?
pip3 install openpyxl

Python pip not working with egg_info error [duplicate]

I'm trying to install some packages with pip.
But pip install unroll gives me
Command "python setup.py egg_info" failed with error code 1 in
C:\Users\MARKAN~1\AppData\Local\Temp\pip-build-wa7uco0k\unroll\
How can I solve this?
About the error code
According to the Python documentation:
This module makes available standard errno system symbols. The value of each symbol is the corresponding integer value. The names and descriptions are borrowed from linux/include/errno.h, which should be pretty all-inclusive.
Error code 1 is defined in errno.h and means Operation not permitted.
About your error
Your setuptools do not appear to be installed. Just follow the Installation Instructions from the PyPI website.
If it's already installed, try
pip install --upgrade setuptools
If it's already up to date, check that the module ez_setup is not missing. If it is, then
pip install ez_setup
Then try again
pip install unroll
If it's still not working, maybe pip didn't install/upgrade setup_tools properly so you might want to try
easy_install -U setuptools
And again
pip install unroll
Here's a little guide explaining a little bit how I usually install new packages on Python + Windows. It seems you're using Windows paths, so this answer will stick to that particular SO:
I never use a system-wide Python installation. I only use virtualenvs, and usually I try to have the latest version of 2.x & 3.x.
My first attempt is always doing pip install package_i_want in some of my Visual Studio command prompts. What Visual Studio command prompt? Well, ideally the Visual Studio which matches the one which was used to build Python. For instance, let's say your Python installation says Python 2.7.11 (v2.7.11:6d1b6a68f775, Dec 5 2015, 20:40:30) [MSC v.1500 64 bit (AMD64)] on win32. The version of Visual Studio used to compile Python can be found here, so v1500 means I'd be using vs2008 x64 command prompt
If the previous step failed for some reason I just try using easy_install package_i_want
If the previous step failed for some reason I go to gohlke website and I check whether my package is available over there. If it's so, I'm lucky, I just download it into my virtualenv and then I just go to that location using a command prompt and I do pip install package_i_want.whl
If the previous step didn't succeed I'll just try to build the wheel myself and once it's generated I'll try to install it with pip install package_i_want.whl
Now, if we focus in your specific problem, where you're having a hard time installing the unroll package. It seems the fastest way to install it is doing something like this:
git clone https://github.com/Zulko/unroll
cd unroll && python setup.py bdist_wheel
Copy the generated unroll-0.1.0-py2-none-any.whl file from the created dist folder into your virtualenv.
pip install unroll-0.1.0-py2-none-any.whl
That way it will install without any problems. To check it really works, just login into the Python installation and try import unroll, it shouldn't complain.
One last note: This method works almost 99% of the time, and sometimes you'll find some pip packages which are specific to Unix or Mac OS X, in that case, when that happens I'm afraid the best way to get a Windows version is either posting some issues to the main developers or having some fun by yourself porting to Windows (typically a few hours if you're not lucky) :)
It was resolved after upgrading pip:
python -m pip install --upgrade pip
pip install "package-name"
I got stuck exactly with the same error with psycopg2. It looks like I skipped a few steps while installing Python and related packages.
sudo apt-get install python-dev libpq-dev
Go to your virtual env
pip install psycopg2
(In your case you need to replace psycopg2 with the package you have an issue with.)
It worked seamlessly.
I got this same error while installing mitmproxy using pip3. The below command fixed this:
pip3 install --upgrade setuptools
Download and install the Microsoft Visual C++ Compiler for Python 2.7 from https://www.microsoft.com/en-in/download/details.aspx?id=44266 - this package contains the compiler and set of system headers necessary for producing binary wheels for Python 2.7 packages.
Open a command prompt in elevated mode (run as administrator)
Firstly do pip install ez_setup
Then do pip install unroll (It will start installing numpy, music21, decorator, imageio, tqdm, moviepy, unroll) # Please be patient for music21 installation
Python 2.7.11 64 bit used
Other way:
sudo apt-get install python-psycopg2 python-mysqldb
I had the same issue when installing the "Twisted" library and solved it by running the following command on Ubuntu 16.04 (Xenial Xerus):
sudo apt-get install python-setuptools python-dev build-essential
It's a dependency issue.
I tried running the following commands helped me sorting out the dependencies, in my case the dependency was
grpcio
pip3 install --upgrade pip
python3 -m pip install --upgrade setuptools
pip3 install --no-cache-dir --force-reinstall -Iv grpcio==1.36.1
pip3 install pulsar-client==2.7.0
remember you must have python3 installed in your system.
First try:
pip install unroll
For sure not work :)
Then Try:
pip2 install unroll
Still get error Try:
pip3 install unroll
If pip3 Worked then suggest to change configuration to use pip3 as pip because you will get a lot of issues as the modern now is Python3 = pip3 if you execute a script files.
I had the same problem.
The problem was:
pyparsing 2.2 was already installed and my requirements.txt was trying to install pyparsing 2.0.1 which throw this error
Context: I was using virtualenv, and it seems the 2.2 came from my global OS Python site-packages, but even with --no-site-packages flag (now by default in last virtualenv) the 2.2 was still present. Surely because I installed Python from their website and it added Python libraries to my $PATH.
Maybe a pip install --ignore-installed would have worked.
Solution: as I needed to move forwards, I just removed the pyparsing==2.0.1 from my requirements.txt.
I ran into the same error code when trying to install a Python module with pip.
#Hackndo noted that the documentation indicate a security issue.
Based on that answer, my problem was solved by running the pip install command with sudo prefixed:
sudo pip install python-mpd2
For me this worked
python3 -m pip3 install -U pip
you can also try
python -m pip install -U pip
pip3 install --upgrade setuptools
WARNING: pip is being invoked by an old script wrapper. This will fail in a future version of pip.
Please see https://github.com/pypa/pip/issues/5599 for advice on fixing the underlying issue.
To avoid this problem you can invoke Python with -m pip instead of running pip directly.
Use python3 -m pip "command", eg:
python3 -m pip install --user pyqt5
I tried all of the above with no success. I then updated my Python version from 2.7.10 to 2.7.13, and it resolved the problems that I was experiencing.
That means some packages in pip are old or not correctly installed.
Try checking version and then upgrading pip.Use auto remove if that works.
If the pip command shows an error all the time for any command or it freezes, etc.
The best solution is to uninstall it or remove it completely.
Install a fresh pip and then update and upgrade your system.
I have given a solution to installing pip fresh here - python: can't open file get-pip.py error 2] no such file or directory
next installation helps me:
pip3 install cython
This worked for me:
sudo xcodebuild -license
Upgrading Python to version 3 fixed my problem. Nothing else did.
I downloaded the .whl file from http://www.lfd.uci.edu/~gohlke/pythonlibs/ and then did:
pip install scipy-0.19.1-cp27-cp27m-win32.whl
Note that the version you need to use (win32/win_amd-64) depends on the version of Python and not that of Windows.
I had this problem using virtualenvs (with pipenv) on my new development setup.
I could only solve it by upgrading the psycopg2 version from 2.6.2 to 2.7.3.
More information is at https://github.com/psycopg/psycopg2/issues/594
I faced the same problem with the same error message but on Ubuntu 16.04 LTS (Xenial Xerus) instead:
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-install-w71uo1rg/poster/
I tested all the solutions provided above and none of them worked for me. I read the full TraceBack and found out I had to create the virtual environment with Python version 2.7 instead (the default one uses Python 3.5 instead):
virtualenv --python=/usr/bin/python2.7 my_venv
Once I activated it, I run pip install unirest successfully.
try on linux:
sudo apt install python-pip python-bluez libbluetooth-dev libboost-python-dev libboost-thread-dev libglib2.0-dev bluez bluez-hcidump
Had the same problem on my Win10 PC with different packages and tried everything mentioned so far.
Finally solved it by disabling Comodo Auto-Containment.
Since nobody has mentioned it yet, I hope it helps someone.
I had the same problem and was able to fix by doing the following.
Windows Python needs Visual C++ libraries installed via the SDK to build code, such as via setuptools.extension.Extension or numpy.distutils.core.Extension. For example, building f2py modules in Windows with Python requires Visual C++ SDK as installed above. On Linux and Mac, the C++ libraries are installed with the compiler.
https://www.scivision.co/python-windows-visual-c++-14-required/
Following below command worked for me
[root#sandbox ~]# pip install google-api-python-client==1.6.4
Methods to solve setup.pu egg_info issue when updating setuptools or not other methods doesnot works.
If CONDA version of the library is available to install use conda instead of pip.
Clone the library repo and then try installation by pip install -e . or by python setup.py install
upgrading python's version did the work for me.
I have just encountered the same problem when trying to pip install -e . a new repo. I did not notice that the contents of setup.py haven't been saved properly and I was effectively running the command with an empty setup.py.
Hence you may experience the same error message if the setup.py of the target package is either empty or malformed.
I solved it on Centos 7 by using:
sudo yum install libcurl-devel

Install confluent-kafka avro with pip

I'm trying to install the avro package for confluent-kafka with python3 on macOs Sierra.
Installing the confluent-kafka package works fine, no issues. The problem is when I try to install the avro package:
pip install confluent-kafka[avro]
I just get an error message from the bash, saying:
no matches found: confluent-kafka[avro]
How can I install this package? Anyone else that have managed to do it on mac?
Assuming you are not using bash (in my case it was zsh), the [] might mess with your shell. The following should solve this:
pip install "confluent-kafka[avro]"
For me this worked with the default install from pypi, no need for the github URL.
Try installing directly from github
pip install git+git://github.com/confluentinc/confluent-kafka-python.git
Solved! In my case it was python version
I was using python 3.10.1 version
Uninstall python 3.10.1 and python Launcher from add or remove programs
Download python 3.7.0 for x64 bit using this link or download from here Link
Now you can: pip install confluent-kafka[avro]

Installing MoviePy for Python 3.2 with pip

I am trying to install the Python module MoviePy onto my Raspberry Pi for use with Python 3.2.3 which came ready installed with the OS. I have tried every command line command that I can find and lots of possible permutations of certain words.
Following are the download instructions.
https://zulko.github.io/moviepy/install.html
After much effort, I eventually managed to download pip and installed moviepy, but it was the Python 2.7 version. 😡
I found a separate thing called pip3 and installed it using:
sudo apt-get install python3-pip --fix-missing
It appeared to be successful.
Eventually I found a command that should work with Python 3.2:
pip-3.2 install moviepy
But it gave the error:
Cannot fetch index base URL http://pypi.python.org/simple/
Could not find any downloads that satisfy the requirement moviepy
No distributions at all found for moviepy
Storing complete log in /home/Pi/.pip/pip.log
What do I do?
I have no knowledge of CLI at all...
Do
sudo pip install ez_setup
sudo pip install moviepy
If it says like pip not found type
sudo apt-get install python
Python 3 is a little harder to setup so doing that command will give you 2.7
But there syntax is basicly the same.

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