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pythonpipmultiprocessing
Massyanya
Massyanya

Reputation: 2934

Python multiprocessing installation: Command "python setup.py egg_info" failed with error code 1

Trying to install:

     pip install multiprocessing

Getting an error:

Collecting multiprocessing
Using cached multiprocessing-2.6.2.1.tar.gz
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/private/var/folders/7s/sswmssj51p73hky4mkqs4_zc0000gn/T/pip-build-8c0dk6ai/multiprocessing/setup.py", line 94
    print 'Macros:'
                  ^
SyntaxError: Missing parentheses in call to 'print'

----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /private/var/folders/7s/sswmssj51p73hky4mkqs4_zc0000gn/T/pip-build-8c0dk6ai/multiprocessing/

Anyone knows the way to fix this?

Upvotes: 42

Views: 33631

Answers (6)

Massyanya
Massyanya

Reputation: 2934

In short: Multiprocessing is already pre-installed in python 3, no need to install it.

I found an answer to my question and it's a silly one - multiprocessing is already pre-installed in my version of Python (3.5.2) by default.

It won't show up in the list of packages in Anaconda >> Environments >> root, as it's not a third party package but an internal one.

If anyone is not sure whether this applies to you, just check from multiprocessing import Pool in your Python console.

This is true of all currently supported versions of Python (2.7 and 3.x) and according to a Python maintainer/contributor multiprocessing has been part of the standard library (batteries included) since Python 2.6. https://bugs.python.org/msg326646

You won't need to do a pip install multiprocessing anymore and do NOT include it in your requirements.txt unless you are maintaining a Python 2.4/2.5 application (please migrate!). On most versions you can just import multiprocessing and you should be fine.

Upvotes: 59

jhd
jhd

Reputation: 1253

python -m pip install multiprocessing

Use python2.7 to install multiprocessing instead of using python3.5+

Upvotes: -1

ZICO
ZICO

Reputation: 11

Instead of pip install multiprocessing type instead:

pip install multiprocess

Upvotes: 15

Arun t
Arun t

Reputation: 1

pip3.5 install multiprocessing-utils

https://pypi.org/project/multiprocessing-utils/

Upvotes: -1

Arashsyh
Arashsyh

Reputation: 657

Of course you are trying to install multiprocessing library on python3 while this library is installed on python3 by default and doesn't need to install again. Be Lucky

Upvotes: 1

Daniel Dobalian
Daniel Dobalian

Reputation: 3237

Python 2.7 to 3 changed from print "Hello World" to print('Hello World') making print a function now. Judging from the error message, it looks like pip or multiprocessing is expecting python 3.

You can check your Python version using this command: 

python --version

You update pip if you already have python 3 on linux:

sudo apt-get install python3-pip

For mac, you can use the equivalent homebrew command. This should allow you to use a: 

pip3 install multiprocessing

Upvotes: -2

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