Merge pull request #8 from Code-by-practice/develop

Develop

Author: hegdeashwin

codes/session_2/condition.py

@@ -0,0 +1,11 @@
+# Open terminal > python3 condition.py
+# Start typing below commands and see the output
+
+x = int(input('Please enter an integer: '))
+
+if x < 0:
+  print(str(x) + ' is a negative number')
+elif x == 0:
+  print(str(x) + ' is zero')
+else:
+  print(str(x) + ' is a positive number')

codes/session_2/default.py

@@ -0,0 +1,31 @@
+# Open terminal > python3 default.py
+# Start typing below commands and see the output
+
+# Function with default values for arguments, and while loop examples
+# Note: The default value is evaluated only once.
+
+def askme(prompt, retries=3, reminder='Invalid response, please try again!'):
+  while True:
+    ok = input(prompt)
+
+    if ok in ('y', 'yes'):
+      return True
+    
+    if ok in ('n', 'no'):
+      return False
+    
+    retries = retries - 1
+
+    if retries < 0:
+      raise ValueError('System is auto locked!')
+
+    print(reminder)
+
+askme('Are you sure you want to quit? ')
+
+
+# Annotations example
+def hello(name: str) -> str:
+  print('Annotations: ', hello.__annotations__)
+
+hello('Ashwin')

codes/session_2/loop.py

@@ -0,0 +1,35 @@
+# Open terminal > python3 loop.py
+# Start typing below commands and see the output
+
+animals = ['cat', 'dog', 'racoon']
+for a in animals:
+  print(a, len(a))
+
+print('\n')
+
+for i in range(5):
+  print(i)
+
+print('\n')
+
+for i in range(5, 10):
+  print(i)
+
+print('\n')
+
+# (range start, range end, step) 
+for i in range(0, 10, 3):
+  print(i)
+
+print('\n')
+
+for i in range(-10, -100, -30):
+  print(i)
+
+print('\n')
+
+a = ['My', 'name', 'is', 'Ashwin']
+for i in range(len(a)):
+  print(i, a[i])
+
+print('\n')