Okay so first things first, I haven't tried any other library installs on my Mac (running Yosemite V10.10) so that might be why I'm having trouble, but regardless I'm having difficulties running Scrapy. I've already figured out a few things, such as you need Python 2.7 to install it, which I have and when I type:
$ python -c 'import scrapy; print("%s.%s.%s" % scrapy.version_info)'
It returns 0.24.0 which seems like it's installed however I cannot use any commands. I was following a tutorial and the next line of code it asks for is to create this class:
import scrapy
class MinimalSpider(scrapy.Spider):
"""The smallest Scrapy-Spider in the world!"""
name = 'minimal'
Which I do then to run this piece of code:
scrapy runspider minimal.py
Name of file is minimal.py and this returns a
scrapy: command not found error.
Now after a little bit of debugging, I switched tutorials to this one: http://doc.scrapy.org/en/latest/intro/tutorial.html#intro-tutorial , however when I get to the first real piece of code and run:
scrapy startproject tutorial
it says the same thing.
My suspected resolution:
Now I've already checked and there is nothing in my "username"/Library/Python/2.7/lib/python/site-packages folder - as this is where scrapy was supposed to have been downloaded, actually there's not even a Library folder, as I downloaded scrappy with the line pip install --user Scrapy==0.24 , so it saved it to my user folder, if I move one folder up and go to the main Library/Python/2.7 folder there's no lib file so I'm not really sure where Scrapy downloaded to. I'm not sure if this is causing my error, as I do think I have Scrapy installed.
Related
the problem:
as part of my studies, i have tried to download PyGame for my own independent project. I've currently downloaded 1.9.6, as well as currently owning IDLE version 3.8. i have imported it many times:
folder.
on one occasion , i placed it in its own separate folder with the coding file in another internal folder
when importing it into a new python script, the result was that there was "no module named Pygame", even though it was in a file containing the recent edition (this method was used successfully to download Tkinter).
I also tried making a python script outside the contained folder like this
this,too had the same result.
Any idea what exactly to do?
any more important information
The computer type is a MAC 10.13.6 and the IDE is IDLE. As previously mentioned, the downloaded version is version 1.9.6 and i have not a clue what how many bits my computer manages. Apologies that this is probably one of MILLIONS of the exact same question answered.I've tried at least 2 of these solutions.
First you need to make sure that you have pip installed. Type pip in your cmd (command prompt) and if you get no errors you are fine. If you have errors follow this link to get it. If you are stuck on that link - basically all you need to do is uninstall python and then when you are installing it again tick the box that says:
Add Python 3.5 to PATH
Now just finish installing python.
Next you need to install pygame with pip install pygame in your cmd - run it as administrator just to be safe. If you receive errors try updating pip with python -m pip install --upgrade pip. Now create and save a new python file. Import pygame in that file by using the code import pygame. The output should be:
pygame 1.9.6
Hello from the pygame community. https://www.pygame.org/contribute.html
Now you are free to code in pygame! I hope this helped.
I recently installed the opencv package using pip install and I wrote a small code to test it (cvtest.py). The code runs through the python idle shell but running it though the command prompt gives the error
Error while finding module specification for 'cvtest.py' (ModuleNotFoundError: __path__ attribute not found on 'cvtest' while trying to find 'cvtest.py')
I tried uninstalling and reinstalling both python and the package. looking up the system path using python -m site gives these results. I am the only user of my laptop.
sys.path = [
'C:\\Users\\Kareem Mostafa\\Desktop\\Assignments\\computer vision',
'G:\\Python37\\python37.zip',
'G:\\Python37\\DLLs',
'G:\\Python37\\lib',
'G:\\Python37',
'G:\\Python37\\lib\\site-packages',
This is the code I am using
import cv2
x=cv2.imread('backpack for sale.jpg',0)
cv2.imshow('x',x)
update: the problem is happening with all the py files I am having whether they require imports or not. apparently python is looking for _init_.py for all the files as if they are packages. Any idea what is going on?
For anyone else that had this problem (assuming kareemostafa has fixed it now!)
Removing the .py suffix on the python -m command fixes this problem, it appears -m only requires module names whereas running it directly as a python file (no -m option) requires the .py suffix
In your case python -m cvtest should be sufficient.
Okay, so, I'm actually a beginner in programming Python, and I only found out yesterday how you were supposed to encode pip install ModuleName in the Python command line and not in the interactive shell. I'm trying to download a lot of modules, such as the Send2Trash module, Pyperclip, Requests, Beautiful Soup, and Selenium.
Before I checked the forums about installing modules, I found out how we needed to have the pip tool. I'm a Windows user, but for some reason, I didn't have the 'Scripts' folder installed when I downloaded Python. I didn't know we needed it, so I used raw scripts from GitHub, setup.py, and copy pasted the script into the File Editor in Python, ran it in the interactive shell, and tried to import the module I needed. It worked for the Pyperclip and the Requests module; no errors popped up after I imported them using import pyperclip or import requests, but when I tried the same procedure for the rest of the modules I needed, there were some errors.
Also, when I tried to download the modules on pypi.python.org, I tried to open it using the interactive shell, but then something pops up, 'The file's encoding is invalid for Python3.x...', and when I click 'OK', it's going to say 'Failed to Decode', and close everything.
So, after reading forum after forum, I found out how to download pip, and was also able to download setuptools and wheel. I'm not sure if it's really already downloaded, but I was able to get the 'Scripts' folder that wasn't there before, so I guess so. I also already went into my PATH using the edit environment for your account thing, and I edited the Path variable so its value would lead to my 'Scripts' folder. Please do tell me if I did the right thing here.
So, following the advice of the forums, I tried to install the modules I needed by typing pip install ModuleName in the Python command line instead of the interactive shell, but it still gave me a Syntax Error. I also tried it in Command Prompt, typing the same code pip install ModuleName, but when I clicked Enter, nothing happens; no errors or anything. It seemed like my install was accepted, but when I tried importing the module in the interactive shell, it still gave an Import Error.
Please tell me what I did wrong throughout my process, and how to properly install the modules I need. I would include pictures into this, but it seems I can only add two before my reputation becomes 10, and I'm pretty new here, so... If there's anything I need to elaborate on about my problem, don't hesitate to ask, and I'll try my best.
You say you use windows so you need to understand pip.
pip is a program that installs python modules. You can even use easy_install instead of pip.
some pip commands
pip list -- lists out already installed modules.
pip search <module name> -- searches new modules.
pip -h -- more pip commands you want.
pip installs modules from CMD prompt not from python shell.
Even after installing modules some modules doesn't run as import module
they need to be imported as from module import function.
refer the pip help command and install modules.
DO NOT SAVE SCRIPT FILES IN PYTHON ROOT FOLDER YOU MAY FACE SOME PROBLEMS
Happy Programming!!!
After a whole lot of searching and trying out, I found the solution to my problem. For future Python users who encounter the same thing: always install your modules in the root folder.
In my case, my Command Prompt was automatically inside the C:\Users folder, which caused some problems because I couldn't download my module in there. Once I typed in cd C:\Python34, which was my root folder, I could successfully download the modules I needed using pip install ModuleName.
I would like to use scheduler in my python program however I haven't been able to install it.
I tried with Easy_Install and PIP (neither of which I've used before) and I can't find a link for another method. I'm using Python 2.7 on Windows Vista
Since I've never used PIP before I had to install that first. After installing pip I went to command prompt, changed to the directory with pip and typed:
C:\Python27\Scripts>pip install apscheduler
It didn't come up with an error so I assumed it installed, however when I run my python program, which includes the line: from apscheduler.scheduler import Scheduler
it states:
ImportError: No module named apscheduler.scheduler
and when I look at the list of installed modules in Idle it's not there.
It's probably something obvious since I don't have a lot of experience in programming yet.
Help would be much appreciated!
sm
Hi again,
I got it working finally, in the end I didn't use PIP, in case other people need help this is what I did:
Downloaded the apscheduler tar.gz file
Downloaded 7-zip, since this can extract tar.gz files on Windows.
Extracted the tar.gz file using 7-zip, I had to do this twice since the first time I clicked extract it extracted to a .tar file (APScheduler-2.1.2.tar), it was necessary to extract this file as well.
Added C:python27\ to the windows path (this is in control panel->system & maintenance->system->advanced system settings->environment variables)
(I also added C:python27\scripts\ to the path, but not sure whether this makes a difference.
Opened command prompt and moved to the folder containing the extracted APScheduler files including the file named setup.py
In my case this was- C:\Python27\APScheduler\APScheduler-2.1.2\APScheduler-2.1.2\
In command prompt typed> python setup.py install
Hopefully this was everything, perhaps one day I'll delete everything and try again to check, but it took quite sometime to get it going so right now I think I'll leave it as is.
I'm currently doing the exercise in "Learn python the hard way".
In this exercise i have to install the lpthw.web frame work.
Having installed pip in windows, i open my terminal and hit
pip install lpthw.web
Everything then ends succesfully.
But when i browse C:\Python27\Lib\site-packages\lpthw.web-1.1-py2.7.egg-info and check the installed-files text i can't see the web.py.
Consequently when i try to import it in a simple script i get ImportError.
I don't have python 3 installed as book suggested for possible cause, so i don't know how to work around it.
Any suggestion?
I checked my path
import sys
sys.path
and saw that every single line was using the panda3d path.
As i was not really using it, unistalling it fixed my problem.
For me it was python version control on raspberry pi
(linux) 2.7 is default and does not work.
follow:
https://learn.sparkfun.com/tutorials/python-programming-tutorial-getting-started-with-the-raspberry-pi/configure-your-pi
have other errors now but the import web loads in python.
cheers!