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parallelpip demo
#! -*- Coding: utf-8 -*-
from gevent import monkey
monkey.patch_all()
import gevent
import time
from envoy import run
from sys import exit, argv
import subprocess
import pip
def syntax():
print "Usage:python core.py normal|parallel [libraries]"
def normal_download(lib = None):
try:
if lib:
start = time.time()
print "normal download started"
for l in lib:
print "Trying to install %s"%l
run("pip install %s"%l)
return time.time() - start
else:
syntax()
exit()
except:
print "Unhandled exception"
exit()
def parallel_download(lib = None):
try:
if lib:
print "spawning using gevent"
jobs = [gevent.spawn(pip.call_subprocess, ["pip","install",l]) \
for l in lib]
start = time.time()
print "joined all gevent, d/l started"
gevent.joinall(jobs)
for job in jobs:
print job.value
return time.time() - start
else:
syntax()
exit()
except Exception, e:
print "unhandled exception", e
exit()
if __name__ == "__main__":
if argv[1] == 'parallel':
print(parallel_download(argv[2:])," seconds for parallel d/l")
elif argv[1] == 'normal':
print(normal_download(argv[2:]), "seconds for normal d/l")
else:
syntax()
exit()
1. Create two virtualenv named normalpip and parallelpip.
2. Install envoy, gevent in both the env(pip install envoy gevent)
3. . normalpip/bin/activate
4.clone the code and name as core.py.
5.python core.py normal flask requests
6. . parallelpip/bin/activate
7.python core.py parallel flask requests
sample output
=============
(normalpip)kracekumar@python-lover:~/codes/python/asyncpip$ python core.py normal flask requests
normal download started
Trying to install flask
Trying to install requests
(146.34172201156616, 'seconds for normal d/l')
(testparallelpip)kracekumar@python-lover:~/codes/python/asyncpip$ python core.py parallel flask requests
spawning using gevent
joined all gevent, d/l started
Downloading/unpacking flask
Downloading Flask-0.8.tar.gz (494Kb): 494Kb downloaded
Running setup.py egg_info for package flask
warning: no files found matching '*' under directory 'tests'
warning: no previously-included files matching '*.pyc' found under directory 'docs'
warning: no previously-included files matching '*.pyo' found under directory 'docs'
warning: no previously-included files matching '*.pyc' found under directory 'tests'
warning: no previously-included files matching '*.pyo' found under directory 'tests'
warning: no previously-included files matching '*.pyc' found under directory 'examples'
warning: no previously-included files matching '*.pyo' found under directory 'examples'
no previously-included directories found matching 'docs/_build'
no previously-included directories found matching 'docs/_themes/.git'
Downloading/unpacking Werkzeug>=0.6.1 (from flask)
Downloading Werkzeug-0.8.3.tar.gz (1.1Mb): 1.1Mb downloaded
Running setup.py egg_info for package Werkzeug
warning: no files found matching '*' under directory 'werkzeug/debug/templates'
warning: no files found matching '*' under directory 'tests'
warning: no previously-included files matching '*.pyc' found under directory 'docs'
warning: no previously-included files matching '*.pyo' found under directory 'docs'
warning: no previously-included files matching '*.pyc' found under directory 'tests'
warning: no previously-included files matching '*.pyo' found under directory 'tests'
warning: no previously-included files matching '*.pyc' found under directory 'examples'
warning: no previously-included files matching '*.pyo' found under directory 'examples'
no previously-included directories found matching 'docs/_build'
Downloading/unpacking Jinja2>=2.4 (from flask)
Downloading Jinja2-2.6.tar.gz (389Kb): 389Kb downloaded
Running setup.py egg_info for package Jinja2
warning: no previously-included files matching '*' found under directory 'docs/_build'
warning: no previously-included files matching '*.pyc' found under directory 'jinja2'
warning: no previously-included files matching '*.pyc' found under directory 'docs'
warning: no previously-included files matching '*.pyo' found under directory 'jinja2'
warning: no previously-included files matching '*.pyo' found under directory 'docs'
Installing collected packages: flask, Werkzeug, Jinja2
Running setup.py install for flask
warning: no files found matching '*' under directory 'tests'
warning: no previously-included files matching '*.pyc' found under directory 'docs'
warning: no previously-included files matching '*.pyo' found under directory 'docs'
warning: no previously-included files matching '*.pyc' found under directory 'tests'
warning: no previously-included files matching '*.pyo' found under directory 'tests'
warning: no previously-included files matching '*.pyc' found under directory 'examples'
warning: no previously-included files matching '*.pyo' found under directory 'examples'
no previously-included directories found matching 'docs/_build'
no previously-included directories found matching 'docs/_themes/.git'
Running setup.py install for Werkzeug
warning: no files found matching '*' under directory 'werkzeug/debug/templates'
warning: no files found matching '*' under directory 'tests'
warning: no previously-included files matching '*.pyc' found under directory 'docs'
warning: no previously-included files matching '*.pyo' found under directory 'docs'
warning: no previously-included files matching '*.pyc' found under directory 'tests'
warning: no previously-included files matching '*.pyo' found under directory 'tests'
warning: no previously-included files matching '*.pyc' found under directory 'examples'
warning: no previously-included files matching '*.pyo' found under directory 'examples'
no previously-included directories found matching 'docs/_build'
Running setup.py install for Jinja2
warning: no previously-included files matching '*' found under directory 'docs/_build'
warning: no previously-included files matching '*.pyc' found under directory 'jinja2'
warning: no previously-included files matching '*.pyc' found under directory 'docs'
warning: no previously-included files matching '*.pyo' found under directory 'jinja2'
warning: no previously-included files matching '*.pyo' found under directory 'docs'
Successfully installed flask Werkzeug Jinja2
Cleaning up...
Downloading/unpacking requests
Downloading requests-0.10.6.tar.gz (61Kb): 61Kb downloaded
Running setup.py egg_info for package requests
warning: no files found matching 'test_requests.py'
Downloading/unpacking certifi>=0.0.7 (from requests)
Downloading certifi-0.0.8.tar.gz (118Kb): 118Kb downloaded
Running setup.py egg_info for package certifi
Downloading/unpacking chardet>=1.0.0 (from requests)
Downloading chardet-1.0.1.tar.gz (156Kb): 156Kb downloaded
Running setup.py egg_info for package chardet
Installing collected packages: requests, certifi, chardet
Running setup.py install for requests
warning: no files found matching 'test_requests.py'
Running setup.py install for certifi
Running setup.py install for chardet
Successfully installed requests certifi chardet
Cleaning up...
None
None
(83.12853598594666, ' seconds for parallel d/l')
@sholsapp

The parallel version gives me errors when I run with many dependencies that have a common set of transitive dependencies. The error pops up when multiple projects try to simultaneously installed a transitive dependency. Any ideas how to alleviate/fix that problem?

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