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annotate python/example/install_and_exec.py @ 808:48ea50d346de

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comment re dependency
author Jeff Hammel <k0scist@gmail.com>
date Fri, 28 Oct 2016 17:10:27 -0700
parents 9cb40c01c10a
children
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9cb40c01c10a illustrate downloading a package and rerunning via exec
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1 #!/usr/bin/env python
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2 # -*- coding: utf-8 -*-
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3
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4 """
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5 illustrates installation and execution following installation
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6 """
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7
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8 import os
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9 import subprocess
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10 import sys
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11
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12 here = os.path.dirname(os.path.realpath(__file__))
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13
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14 try:
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15 import gnupg
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16 print ("gnupg installed")
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17 except ImportError:
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18 print ("gnupg not installed")
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19 subprocess.check_call(['pip', 'install', 'gnupg'])
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20 args = [sys.executable] + sys.argv
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21 os.execl(sys.executable, *args)