Create les14_modules.py

Modules

Author: alva922

les14_modules.py

@@ -0,0 +1,86 @@
+#https://newdigitals.org/2024/01/23/basic-python-programming/#modules
+#Modules
+'''
+Python Module is a file that contains built-in functions, classes and variables.
+Consider a module to be the same as a code library. Let’s create a simple calc.py in which we define two functions, one add and another subtract.
+
+'''
+# A simple module, calc.py
+def add(x, y):
+ return (x+y)
+ 
+def subtract(x, y):
+ return (x-y)
+'''
+Save this code in a file named calc.py within the working directory.
+Now, we are importing the calc that we created earlier to perform add operation.
+'''
+# importing module calc.py
+import calc
+ 
+print(calc.add(10, 2))
+ 
+Output:
+12
+
+#The * symbol used with the import statement is used to import all the names from a module to a current namespace.
+# importing sqrt() and factorial from the
+# module math
+from math import *
+ 
+# if we simply do "import math", then
+# math.sqrt(16) and math.factorial()
+# are required.
+print(sqrt(16))
+print(factorial(6))
+Output:
+4.0
+720
+
+#Directories List for Modules: sys.path is a built-in variable within the sys module. It contains a list of directories that the interpreter will search for the required module.
+
+# importing sys module
+import sys
+ 
+# importing sys.path
+print(sys.path)
+
+#We can rename the module while importing it using the keyword.
+# importing sqrt() and factorial from the
+# module math
+import math as mt
+ 
+# if we simply do "import math", then
+# math.sqrt(16) and math.factorial()
+# are required.
+print(mt.sqrt(16))
+print(mt.factorial(6))
+Output:
+4.0
+720
+#We can import specific names from a module without importing the module as a whole
+# import only pi from math module
+from math import pi
+ 
+print(pi)
+ 
+Output:
+3.141592653589793
+
+#The module can contain functions, as already described, but also variables of all types (arrays, dictionaries, objects etc.):
+#Let’s the dictionary person1 in calc.py
+person1 = {
+ "name": "John",
+ "age": 36,
+ "country": "Norway"
+}
+#Running the code snippet
+import calc as mymod
+ 
+a = mymod.person1["age"]
+print(a)
+ 
+Output:
+36
+
+