Tag Archives: python
While loop in Python
#The while loop in Python uses a counter variable as a #condition. The counter is incremented by 1 at the end of #each iteration of the loop and the condition (counter < 5) #is checked at the beginning of each iteration of the loop. #The while loop will keep looping as long as the condition …
List Comprehensions
#define a list named “numbers” with 7 values numbers = [34.6, -203.4, 44.9, 68.3, -12.2, 44.6, 12.7] #create a newlist using list comprehensions: newlist = [int(x) for x in numbers if x > 0] #printing newlist will only have positive numbers print(newlist)
Classes and Objects in Python
#define the Vehicle class class Vehicle: name = “” kind = “car” color = “” value = 100.00 #class function named description #we define a variable named desc_str and use #string formatting inside the string def description(self): desc_str = “%s is a %s %s worth $%.2f.” % (self.name, self.color, self.kind, self.value) return desc_str #instantiate two …
Conditions in Python
#Conditions x = 2 print(x==2) #prints out True print(x==3) #prints out False print(x<3) #prints out True #Using “and” + “or” keywords name = “John” age = 23 if name == “John” and age == 23: print(“Your name is John, and you are also 23 years old.”) if name == “John” or name == “Rick”: print(“Your …
Basic String Operations in Python
#Basic_String_Operations # <<—this is a comment #can use double or single quotes” astring = “Hello world!” astring2 = ‘Hello world!’ #enclose single quotes inside double quotes print(“single quotes are ‘ ‘”) #print the length of a string print(len(astring)) #print index of string w/ first occurrence of the letter #”o” print(astring.index(“o”)) #count the number of “ls” …
Python String Formatting
data = (“John”, “Doe”, 53.44) format_string = “Hello %s %s. Your current balance is $%s.” print(format_string % data)
Python print statement functionality
The print() statement in Python 3 allows you to specify the result of an if-else statement before the test condition syntax. The example code below has an output of 1.
Object Oriented Analysis
The Person class includes Instructor and Student Objects. Notice the Inherited properties (Name, Address and Date of Birth). Other properties are specific to each object like Office Location for the Instructor object and GPA for the Student object.
How to define a main function in Python
#Defining a main function in Python def main(): print (“Hello World!”) if __name__ == “__main__”: main()
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