Adding more folders to chapter 2

Chapter2/module_reusable/main_panda.py

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+
+import mypanda
+
+def my_main():
+
+    dict = {"country": ["Brazil", "Russia", "India", "China", "South Africa"],
+            "capital": ["Brasilia", "Moscow", "New Dehli", "Beijing", "Pretoria"],
+            "area": [8.516, 17.10, 3.286, 9.597, 1.221],
+            "population": [200.4, 143.5, 1252, 1357, 52.98]}
+
+    mypanda.print_dataframe (dict)
+
+""" This is executed only if the special variable '__name__' is set as main"""
+if __name__ == "__main__":
+    my_main()

Chapter2/module_reusable/mypanda.py

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+# mypanda.py with default and custom random functions
+import pandas
+
+def print_dataframe(dict):
+   """This function output a dictionary as a data frame """
+
+   brics = pandas.tDataFrame(dict)
+   print(brics)
+

Chapter2/module_reusable/myrandomv2.py

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+# myrandomv2.py with default and custom random functions
+import random
+
+#random = __import__('random')
+
+#random = importlib.import_module('random')
+print (globals())
+
+def random_1d():
+   """This function get a random number between 0 and 9"""
+   return random.randint(0,9)
+
+def random_2d():
+   """This function get a random number between 10 and 99"""
+   return random.randint(10,99)

Chapter2/modules_import/calcmain1.py

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+# calcmain1.py with a main function
+import mycalculator
+import myrandom
+
+def my_main( ):
+    """ This is a main function which generates two random numbers      and then apply calculator functions on them """
+    x = myrandom.random_2d( )
+    y = myrandom.random_1d( )
+    sum = mycalculator.add(x, y)
+    diff = mycalculator.subtract(x, y)
+
+    print("x = { }, y = { }".format(x, y))
+    print("sum is { }".format(sum))
+    print("diff is { }".format(diff))
+
+""" This is executed only if the special variable '__name__' is set as main"""
+if __name__ == "__main__":
+    my_main()

Chapter2/modules_import/calcmain2.py

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+# calcmain2.py with  alias for modules
+import mycalculator as calc
+import myrandom as rand
+
+
+def my_main():
+    """ This is a main function which generates two random numbers and then apply calculator functions on them """
+    x = rand.random_2d()
+    y = rand.random_1d()
+
+    sum = calc.add(x,y)
+    diff = calc.subtract(x,y)
+
+    print("x = {}, y = {}".format(x,y))
+    print("sum is {}".format(sum))
+    print("diff is {}".format(diff))
+
+    print (globals())
+
+""" This is executed only if the special variable '__name__' is set as main"""
+if __name__ == "__main__":
+    my_main()

Chapter2/modules_import/calcmain3.py

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+# calcmain3.py with from and alias combined
+from mycalculator import add as my_add
+from mycalculator import subtract as my_subtract
+from myrandom import random_2d, random_1d
+
+def my_main():
+    """ This is a main function which generates two random numbers and then apply calculator functions on them """
+    x = random_2d()
+    y = random_1d()
+
+    sum =  my_add(x,y)
+    diff = my_subtract(x,y)
+
+    print("x = {}, y = {}".format(x,y))
+    print("sum is {}".format(sum))
+    print("diff is {}".format(diff))
+
+    print (globals())
+
+""" This is executed only if the special variable '__name__' is set as main"""
+if __name__ == "__main__":
+    my_main()

Chapter2/modules_import/globalmain.py

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+# globalmain.py with globals function
+
+def print_globals():
+    print (globals())
+
+def hello():
+    print ("Hello")
+
+if __name__ == "__main__":
+    print_globals()

Chapter2/modules_import/mycalculator.py

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+# mycalculator.py with add and subtract functions
+def add(x, y):
+    """This function adds two numbers"""
+    return x + y
+
+
+def subtract(x, y):
+    """This function subtracts two numbers"""
+    return x - y
+

Chapter2/modules_import/myrandom.py

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+# myrandom.py with default and custom random functions
+import random
+
+#random = __import__('random')
+
+#random = importlib.import_module('random')
+print (globals())
+
+def random_1d():
+   """This function get a random number between 0 and 9"""
+   return random.randint(0,9)
+
+def random_2d():
+   """This function get a random number between 10 and 99"""
+   return random.randint(10,99)
+
+def get_random(lower, upper):
+   """This function get a random number between lower and upper"""
+   return random.randint(lower,upper)