How to use 'conda create environment' in Python

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def create_env(self, py, args):
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    if py:
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        args = ["--python=%s" % py] + args
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    subprocess.check_call(
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        [sys.executable, '-m', 'virtualenv', str(self.root)] + args,
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    )

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def create_virtualenv(self, no_site_packages=True):
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    """Creates the virtual environment and installs PIP.
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    Creates the virtual environment and installs PIP only into the
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    virtual environment.
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    """
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    if not os.path.isdir(self.venv):
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        print 'Creating venv...',
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        if no_site_packages:
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            self.run_command(['virtualenv', '-q', '--no-site-packages',
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                             self.venv])
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        else:
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            self.run_command(['virtualenv', '-q', self.venv])
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        print 'done.'
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        print 'Installing pip in venv...',
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        if not self.run_command(['tools/with_venv.sh', 'easy_install',
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                                'pip>1.0']).strip():
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            self.die("Failed to install pip.")
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        print 'done.'
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    else:
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        print "venv already exists..."
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        pass