I followed the instructions in this link about Kivy installation "Using Homebrew with pip".
However, when I tried to run the code given below:
from kivy.app import App
from kivy.uix.button import Button
class TestApp(App):
def build(self):
return Button(text='Hello World')
TestApp().run()
It gave me an error:
bash: kivy: command not found
if you installed kivy with pip, you don't need a kivy command, you can use python directly.
python main.py
Because I created a virtual environment to isolate all the things that needs to be installed like kivy, and I installed cython and kivy first before the homebrew, it caused the problem. Even if I use:
python main.py
instead of
kivy main.py
What I did to solve it are the following:
1. Created a new virtual environment
2. Followed the instruction in kivy in right order: (1) homebrew, (2) Cython, then (3) Kivy.
3. Used "python" command instead of "kivy" command because I installed it using pip (refer to the commenr above). For example:
python name_of_your_file.py
Kivy documentation must be confusing that's why.
Related
I've been trying to install matplotlib and textblob on my system using
pip3 install matplotlib
or
pip3 install textblob
It says it's installed successfully. However, when I try to import in in Sublime Text it says
ModuleNotFoundError: No module named 'matplotlib'
or
ModuleNotFoundError: No module named 'textblob'
I've set up the build system in sublime text for python 3. A lot of modules that I've installed and are using the same way works fine (BeautifulSoup, requests and tweepy for example). I do not understand why some modules work and others do not. I've been trying to find the solution to this problem but after hours of research without results, I see this question as my last resort. Very thankful for all help.
shell_cmd: /usr/bin/env python3
I've installed this package via pip27 on macports. My OS is OSX El Capitan 10.11.6. My python install is 2.7.10.
I'm trying to run an example script that imports googlemaps module, but I keep getting that ImportError. I have a feeling that it's how pip installed it and the reason why python can't find it, but I'm relatively new to pip so I don't know where to start investigating.
I also tried googling for a fix but no dice. Any idea what's happening here?
Here's my code:
import googlemaps # can't import
import argparse
from datetime import datetime
# collect args for lat, long, # of addresses, radius of search
parser = argparse.ArgumentParser(description='Randomize addresses on Google Maps')
parser.add_argument('-lt', '--latitude')
parser.add_argument('-lng', '--longitude')
parser.add_argument('-n', '--count')
parser.add_argument('-r', '--radius')
args = parser.parse_args()
print('Results: ', vars(args))
Error message:
Traceback (most recent call last):
File "randomize_addresses.py", line 1, in <module>
import googlemaps
ImportError: No module named googlemaps
Found a fix. I uninstalled googlemaps via pip and then reinstalled using easy_install. Apparently OSX doesn't like pip.
Looks like you used pre-installed python since you mentioned version 2.7.10 (default version shipped with macOS) which is located at /usr/bin/.
MacPorts installs binaries and libraries under /opt/local. Try to install python via MacPorts and run the program again. Python and pip should both be linked so that packages installed via pip is available to python.
In this case packages installed using pip27 would be available to python27 installed via MacPorts and not /usr/bin/python.
Another way would be to download get-pip.py and install it against /usr/bin/python (pip installation guide).
Note: Make sure you are using python installed via MacPorts. To check this run which python, it should show something like /opt/local/bin/python2.7
I have python2.7.8 on mac, things I did:
sudo easy_install pip - worked.
pip install numpy:
Requirement already satisfied (use --upgrade to upgrade): numpy in /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python
I also did "pip upgrade numpy" - no luck. What's wrong?
Your problem is a conflict of different Python versions.
I would recommend installing Python and all the packages, such as numpy, scipy, matplotlib, pandas, etc via Brew
See this tutorial: https://github.com/Homebrew/homebrew/blob/master/share/doc/homebrew/Homebrew-and-Python.md
You can verify which Python you're running with which python or which python3 in Terminal.
This solution is more flexible and cleaner in my opinion than using Conda/Miniconda. However it is also a bit more lengthy to install, as you need to have Xcode, devtools installed to build everything
Could it be that you have multiple versions of python installed? What happens if you run python using the full path like this:
$ /System/Library/Frameworks/Python.framework/Versions/2.7/bin/python2
instead of just python2?
In my experience on Mac (and other OS too) it is best to go with Anaconda / Miniconda. This is especially true for packages like NumPy and others from scientific stack.
While Anaconda is a full-blown distribution with about 200 packages, Miniconda is just Python with a few basic libraries. The big advantage is that all packages install as binary. Further, it makes it very simple and stable to install multiple Python versions side by side. For example:
conda create -n py27 python=2.7
creates a new environment with Python 2.7. Activate with:
source activate py27
Now:
conda install numpy
installs NumPy cleanly.
You can do the same for Python 3.5 and switch between environments with source activate.
After jumping from one stackoverflow answer to another I found the solution!
my problems were:
numpy at different location( actually at right, expected-to-be location). It was the IDLE that looks for its own default folder where python2.7 installed.
I checked that my numpy is working like this, run this script to check it is working:
import os
import sys
import pygame
sys.path.insert(0, '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python')
import numpy
pygame.init()
print "( using __version__): " + numpy.__version__
print numpy.version.version
user_paths = os.environ['PYTHONPATH']
print(user_paths)
sys.path insertion adds additional path to IDLE, so it knows where to look for numpy.
Then I check if numpy truly imported - i just print its version. Right now it is 1.8.0rc.
I want to find a way to avoid using this syspath insertion all the time.
So far so good - for now.
I had a similiar problem with numpy. However, it was resolved by choosing the right environment. If you are using VScode, open the command palette (ctrl+shift+p) and type
Python: Select Interpreter.
From there, try choosing the right virtual environment/Interpreter.
I am using Python 2.7 through Anaconda 2.7.8 and need Kapteyn 2.2 to perform Non-linear Least Squares fitting easily (it is probably an alternative to Scipy.optimize.leastsq() for dummies like me!).
After copy-pasting this from a previous post here on Stack Overflow:
conda install -c https://conda.binstar.org/dhirschfeld pyodbc
and then running on my cmd (as I did not have pyodbc installed I think, because of which maybe the command prompt on my Windows 7 64-bit system was not responding well to python setup.py install inside the Anaconda directory where I unzipped the Kapteyn .zip file downloaded from University of Groningen website.
But, after the installing pyodbc properly and running python setup.py install, the cmd gave me an error saying error: command 'C:\Users\windows 7\Anaconda\Scripts\gcc.bat' failed with exit status 1. Later, when I tried to import kmpfit module (needed for Non-linear least square fitting with Kapteyn), here is the problem:
import kapteyn
help(kapteyn)
Help on package kapteyn:
NAME
kapteyn - Kapteyn package.
FILE
c:\users\windows 7\anaconda\kapteyn\__init__.py
PACKAGE CONTENTS
_ni_support
celestial
doccer
filters
interpolation
maputils
mplutil
positions
rulers
shapes
tabarray
wcsgrat
DATA
__all__ = ['celestial', 'wcs', 'wcsgrat', 'tabarray', 'maputils', 'mpl...
__version__ = '2.2'
VERSION
2.2
As you can see, there is no module named kmpfit (or even wcs) here. But according to http://www.astro.rug.nl/software/kapteyn/intro.html, these two should be there.
Kindly help. I have never imported any module before.
Thanks in advance...:-)
I just managed to get this working (on Mac OSX, so you may have to adjust this). My steps were:
$ conda install pyodbc (didn't need to go through binstar)
Download & unarchive the kapteyn package, then navigate to its directory
$ python setup.py install, which used my OS's C compiler and Anaconda's python, and installed kapteyn to my anaconda distro's site-packages, as it should.
Check that kmpfit.so is in the kapteyn folder in site-packages, showing that kmpfit installed correctly.
>> from kapteyn import kmpfit failed, ImportError: cannot import name kmpfit. I did some digging and discovered that it was still importing kapteyn from the folder that I downloaded, not from site-packages.
Delete the downloaded kapteyn folder, then try again. It worked!
I'm a total newbie concerning Python and I have trouble installing Scrapy on Mac OS X 10.7. I've tried a lot of different things, but in summary, when I run:
scrapy startproject tutorial
I've got these errors :
ImportError: dlopen(/Library/Python/2.7/site-packages/lxml/etree.so, 2): Symbol not found: ___xmlStructuredErrorContext
Referenced from: /Library/Python/2.7/site-packages/lxml/etree.so
Expected in: flat namespace
in /Library/Python/2.7/site-packages/lxml/etree.so
After a lot of googling, I've followed this post and tried:
python setup.py build --static-deps --libxml2-version=2.7.8 && pip install lxml
but it tells me:
RuntimeError: ERROR: Trying to build without Cython, but pre-generated 'src/lxml/lxml.etree.c' is not available (pass --without-cython to ignore this error).
And if I run the same command with the —without-cython option, I get:
error: command 'llvm-gcc-4.2' failed with exit status 1
(though I've installed XCode command line tools)
Thanks in advance for your help !
(fyi, I am using MacPorts and pip install…)
You mention Macports at the end and also pip. I think you are mixing up packaging and installation methods.
The first import error should not be seen using a macports python as it puts its libraries under /opt/
As you have started on macports I would use the easy way
port install py27-scrapy
This will install all the needed packages (including python and lxml) to get scrapyto work.
To run scrapy you would need to use the macports python in /opt/local/bin/python2.7. This can be set as the default python if /opt/local/bin is on your path and you run port select to choose this as the python found. The scrapy executable script is /opt/local/bin/scrapy-2.7 Version numbers are used because you can have multiple versions of python working at once.