Merge pull request #13 from the-code-experiments/develop

Develop

Author: hegdeashwin

codes/session_2/iterators.py

@@ -0,0 +1,23 @@
+# Open terminal > python3 iterators.py
+# Start typing below commands and see the output
+
+for element in [1, 2, 3]:
+  print(element)
+
+for element in (1, 2, 3):
+  print(element)
+
+for key in { 'one': 1, 'two': 2, 'three': 3}:
+  print(key)
+
+for char in '123':
+  print(char)
+
+print('\n\n')
+
+s = 'XYZ'
+it = iter(s)
+print(next(it))
+print(next(it))
+print(next(it))
+print(next(it)) # StopIteration Exception

codes/session_7/classEg1.py

@@ -0,0 +1,29 @@
+# Open terminal > python3 classEg1.py
+# Start typing below commands and see the output
+
+def scopeTesting():
+  def doLocal():
+    name = '(Do not change) -> LOCAL'
+    print(name)
+
+  def doNonLocal():
+    nonlocal name # Change the name binding to scopeTesting's level
+    name = '-> Changed to NON-LOCAL' 
+  
+  def doGlobal():
+    global name # Change the name binding to module level
+    name = '-> Changed to GLOBAL'
+
+  name = "-> (Do not Change) DEFAULT" # Default, DO NOT change the name binding to scopeTesting's level"
+
+  doLocal()
+  print('After local assignment: ', name)
+
+  doNonLocal()
+  print('After non-local assignment: ', name)
+
+  doGlobal()
+  print('After global assignment: ', name)
+
+scopeTesting()
+print('In global scope: ', name)

codes/session_7/classEg2.py

@@ -0,0 +1,12 @@
+# Open terminal > python3 classEg2.py
+# Start typing below commands and see the output
+
+class Person:
+  name = 'Mr. Unknown'
+
+  def __init__(self, email):
+    self.email = email
+
+p1 = Person('[email protected]')
+print(p1.name)
+print(p1.email)

codes/session_7/classEg3.py

@@ -0,0 +1,16 @@
+# Open terminal > python3 classEg3.py
+# Start typing below commands and see the output
+
+class Person:
+  actions = []
+
+  def addAction(self, action):
+    self.actions.append(action)
+
+p1 = Person()
+
+p1.addAction('Eating')
+p1.addAction('Walking')
+p1.addAction('Sleeping')
+
+print(p1.actions)

codes/session_7/classEg4.py

@@ -0,0 +1,16 @@
+# Open terminal > python3 classEg4.py
+# Start typing below commands and see the output
+
+class Person:
+  def __init__(self):
+    self.actions = []
+
+  def addActions(self, action):
+    self.actions.append(action)
+  
+p1 = Person()
+
+p1.addActions('Eating')
+p1.addActions('Sleeping')
+
+print(p1.actions)

codes/session_7/classEg5.py

@@ -0,0 +1,27 @@
+# Open terminal > python3 classEg5.py
+# Start typing below commands and see the output
+
+# Base class
+class Person:
+  actions = []
+  
+  # def __init__(self):
+  #   self.actions = []  # Cannot be accessed from Derived class instance
+
+  def addActions(self, action):
+    self.actions.append(action)
+
+# Derived class
+class Student(Person):
+  def __init__(self):
+    self.name = 'Ashwin'
+
+  def getName(self):
+    return 'My name is ' + self.name
+
+s1 = Student()
+print(s1.getName())
+
+s1.addActions('Eating')
+s1.addActions('Sleeping')
+print(s1.actions)

codes/session_7/classEg6.py

@@ -0,0 +1,18 @@
+# Open terminal > python3 classEg6.py
+# Start typing below commands and see the output
+
+class A:
+  name = 'A'
+
+  def getName(self):
+    return self.name
+
+class B(A):
+  name = 'B' # Override class A's name
+
+  def getName(self):
+    return self.name
+
+b = B()
+
+print(b.getName())

codes/session_7/classEg7.py

@@ -0,0 +1,24 @@
+# Open terminal > python3 classEg7.py
+# Start typing below commands and see the output
+
+class A:
+  name = 'A'
+
+  def getName(self):
+    return self.name
+
+class B:
+  name = 'B'
+
+  def getName(self):
+    return self.name
+
+class C(A, B):
+  name = 'C' # C Override A Override B
+
+  def getName(self):
+    return self.name
+
+c = C()
+
+print(c.getName())

codes/session_7/classEg8.py

@@ -0,0 +1,21 @@
+# Open terminal > python3 classEg8.py
+# Start typing below commands and see the output
+
+class Reverse:
+  def __init__(self, data):
+    self.data = data
+    self.index = len(data)
+  
+  def __iter__(self):
+    return self
+  
+  def __next__(self):
+    if self.index == 0:
+      raise StopIteration
+    self.index = self.index - 1
+    return self.data[self.index]
+
+r = Reverse('XYZ')
+
+for char in r:
+  print(char)