Python For Loops. A for loop is used for iterating over a sequence (that is either a list, a tuple, a dictionary, a set, or a string). This is less like the for keyword in other programming languages, …

Python Conditions and If statements. Python supports the usual logical conditions from mathematics: Equals: a == b; Not Equals: a != b; Less than: a < b; Less than or equal to: a <= …

Python Conditions and If statements. Python supports the usual logical conditions from mathematics: Equals: a == b; Not Equals: a != b; Less than: a < b; Less than or equal to: a <= …

Write to an Existing File. To write to an existing file, you must add a parameter to the open() function: "a" - Append - will append to the end of the file "w" - Write - will overwrite any existing …

f.write("Lorum Ipsum") except: print("Something went wrong when writing to the file") finally: f.close() except: print("Something went wrong when opening the file")

Python also accepts function recursion, which means a defined function can call itself. Recursion is a common mathematical and programming concept. It means that a function calls itself. This …

Loop Through a Dictionary. You can loop through a dictionary by using a for loop. When looping through a dictionary, the return value are the keys of the dictionary, but there are methods to …

The for loop actually creates an iterator object and executes the next() method for each loop. Create an Iterator To create an object/class as an iterator you have to implement the methods …

You can evaluate any expression in Python, and get one of two answers, True or False. When you compare two values, the expression is evaluated and Python returns the Boolean answer:

Create a slice that starts at the end of the string, and moves backwards. In this particular example, the slice statement [::-1] means start at the end of the string and end at position 0, …