Add show option

README.md

@@ -7,14 +7,16 @@ Python 2.7 is required.
 ## Usage
 
 ```console
-usage: pipdeps [-h] (-l | -u)
+$ pipdeps.py --help
+usage: pipdeps.py [-h] (-l | -u | -s SHOW [SHOW ...])
 
 Pipdeps shows/upgrades outdated packages with respect to existing
 dependencies.
 
 optional arguments:
   -h, --help            show this help message and exit
-  -l, --list     show upgradable packages and versions
-  -u, --upgrade  upgrade upgradable packages
-
+  -l, --list            show upgradeable packages and versions
+  -u, --upgrade         upgrade upgradeable packages
+  -s SHOW [SHOW ...], --show SHOW [SHOW ...]
+                        show detailed info about upgradeable packages
 ```

pipdeps/pipdeps.py

@@ -5,10 +5,11 @@ import argparse
 import json
 import distutils.version
 import os
-import urllib2
+import pprint
 import re
 import subprocess
 import sys
+import urllib2
 import tarfile
 import tempfile
 import zipfile
@@ -32,6 +33,9 @@ def arg_parse():
     group.add_argument('-u', '--upgrade',
                        action='store_true',
                        help="upgrade upgradeable packages")
+    group.add_argument('-s', '--show',
+                       nargs='+',
+                       help="show detailed info about upgradeable packages")
     return parser.parse_args()
 
 def get_pyver():
@@ -312,6 +316,23 @@ def select_pkgs(packages_data, rkey):
             result[pkg] = pkg_data
     return result
 
+def print_list(upgradeable_pkgs):
+    """
+    Provides list option
+    """
+    if upgradeable_pkgs:
+        data = []
+        for pkg, pkg_data in sorted(upgradeable_pkgs.iteritems(), key=lambda x: x[0].lower()):
+            data.append([pkg, pkg_data['installed_version'], pkg_data['upgradeable_version']])
+        print tabulate.tabulate(
+            data,
+            ['package', 'installed_version', 'upgradeable_version']
+        )
+        sys.exit(1)
+    else:
+        print "There is nothing to upgrade."
+        sys.exit(0)
+
 def main():
     """
     main function
@@ -339,17 +360,10 @@ def main():
     upgradeable_pkgs = select_pkgs(packages_data, 'upgradeable_version')
 
     if arguments.list:
-        if upgradeable_pkgs:
-            data = []
-            for pkg, pkg_data in sorted(upgradeable_pkgs.iteritems(), key=lambda x: x[0].lower()):
-                data.append([pkg, pkg_data['installed_version'], pkg_data['upgradeable_version']])
-            print tabulate.tabulate(
-                data,
-                ['package', 'installed_version', 'upgradeable_version']
-            )
-            sys.exit(1)
-        else:
-            print "There is nothing to upgrade."
+        print_list(upgradeable_pkgs)
+    if arguments.show:
+        for pkg in arguments.show:
+            pprint.pprint({pkg: packages_data[pkg]})
         sys.exit(0)
     if arguments.upgrade:
         if 'pip' in upgradeable_pkgs.keys():