@@ -10,23 +10,18 @@ Parse [Raspberry Pi revision codes][].

 `raspi-revcode --help`:

 ```

-usage:

-  raspi-revcode [<code>]

-  raspi-revcode -h|--help

-  raspi-revcode --version

+usage: raspi_revcode.py [-h] [--version] [<code>]

 Parse Raspberry Pi revision codes.

 positional arguments:

-  <code>

-    A hexadecimal revision code to parse. If not given, '/proc/cpuinfo' will be

-    used to get the revision code of the current device.

+  <code>      A hexadecimal revision code to parse. If not given,

+              '/proc/cpuinfo' will be used to get the revision code of the

+              current device.

 optional arguments:

-  -h, --help

-    Show this help message and exit.

-  --version

-    Show program's version number and exit.

+  -h, --help  show this help message and exit

+  --version   show program's version number and exit

 ```

 ## Examples

@@ -72,6 +67,14 @@ Overvoltage  : Overvoltage disallowed

 ## Install

+`raspi-revcode` depends only on the Python standard library which means that,

+if [Python is installed][Python download], it can run be as a standalone script

+without installation:

+

+```sh

+./raspi_revcode.py

+```

+

 ### Prerequisites

 Make sure [Python is installed][Python download], [`pip`][] is available and

@@ -1,32 +1,10 @@

 #!/usr/bin/env python3

-## Help

-

-"""

-usage:

-  raspi-revcode [<code>]

-  raspi-revcode -h|--help

-  raspi-revcode --version

-

-Parse Raspberry Pi revision codes.

-

-positional arguments:

-  <code>

-    A hexadecimal revision code to parse. If not given, '/proc/cpuinfo' will be

-    used to get the revision code of the current device.

-

-optional arguments:

-  -h, --help

-    Show this help message and exit.

-  --version

-    Show program's version number and exit.

-"""

-

 ## Imports

 import sys

 import re

-import docopt

+import argparse

 ## Constants

@@ -176,7 +154,15 @@ def parse(code):

 def main():

     # Parse arguments.

-    args = docopt.docopt(__doc__, version=VERSION)

+    parser = argparse.ArgumentParser(description="""

+        Parse Raspberry Pi revision codes.

+    """);

+    parser.add_argument('--version', action='version', version=VERSION)

+    parser.add_argument('<code>', nargs='?', help="""

+        A hexadecimal revision code to parse. If not given, '/proc/cpuinfo'

+        will be used to get the revision code of the current device.

+    """)

+    args = vars(parser.parse_args())

     # Get code string from argument.

     code = args['<code>']

     # Get code string from system.

@@ -19,7 +19,6 @@ setup(

     ],

     python_requires='>=3, <4',

     install_requires=[

-        'docopt',

     ],

     py_modules=['raspi_revcode'],

     entry_points={