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--- python_wiki:list_comprehensions [2018/08/03 00:46]
billdozor created
+++ python_wiki:list_comprehensions [2019/05/25 23:50] (current)
@@ Line 14: / Line 14: @@
 ====== Usage ======
-FIXME -> Fill out list comprehension example and code.
+Using the code snippet.
-Instructions here.
 <code bash>
-Execution code here
+chmod +x list-comp.py
+./list-comp.py
+# Example output
+('The tuple is: ', ('centos', 'ubuntu', 'fedora', 'windows', 'arch', 'freebsd'))
+('The nix os list is: ', ['centos', 'ubuntu', 'fedora', 'arch', 'freebsd'])
 </code>
@@ Line 25: / Line 28: @@
 ====== The Code ======
-<code python program-name.py>
+**List Comprehension Syntax**
-Program code here
+<code python>
+new_list = [x for x in iterable if filter]
+</code>
+\\
+**List Comprehension Example**
+<code python list-comp.py>
+#!/usr/bin/python
+# Tuple with a list of OS's
+my_tuple = ('centos', 'ubuntu', 'fedora', 'windows', 'arch', 'freebsd')
+# Create a new list based off of the tuple, exclude 'windows'
+nix_os = [entry for entry in my_tuple if entry != 'windows']
+print("The tuple is: ", my_tuple)
+print("The nix os list is: ", nix_os)
+</code>
+\\
+The long way **without list comprehensions** of the above code is
+<code python>
+#!/usr/bin/python
+# Tuple with a list of OS's
+my_tuple = ('centos', 'ubuntu', 'fedora', 'windows', 'arch', 'freebsd')
+# Create a new list based off of the tuple, exclude 'windows'
+# This time, do not use a list comprehension
+nix_os = []
+for entry in my_tuple:
+  if entry != 'windows':
+    nix_os.append(entry)
+print("The tuple is: ", my_tuple)
+print("The nix os list is: ", nix_os)
 </code>
 ----