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--- python [2012/07/30 02:44] – created memeruiz
+++ python [2021/02/01 05:55] (current) – external edit 127.0.0.1
@@ Line 4: / Line 4: @@
 ===== How to read command line arguments =====
+==== Simple approach ====
   import sys
   print sys.argv # this is an array containing all command line arguments inclusive the program name
+==== OptParse ====
+  from optparse import OptionParser
+  parser = OptionParser()
+  parser.add_option("-f", "--file", dest="filename",
+                    help="write report to FILE", metavar="FILE")
+  parser.add_option("-q", "--quiet",
+                    action="store_false", dest="verbose", default=True,
+                    help="don't print status messages to stdout")
+  (options, args) = parser.parse_args()
+===== How to make a python source code file executable =====
+Code example:
+  #!/usr/bin/env python # this finds the default python executable defined by the current environment (PATH).
+  print "test"
+In the console don't forget to give executable permissions:
+  chmod +x example.py
+===== Important functions =====
+  os.walk("dir")
+  os.*
+  sys.argv
+===== Important modules =====
+  optparse
+  multiprocessing
+  numpy