By Swaroop C H
‘A Byte of Python’ is a loose ebook on programming utilizing the Python language. It serves as an educational or consultant to the Python language for a newbie viewers. If all you recognize approximately desktops is the right way to store textual content records, then this is often the ebook for you. This booklet is written for the newest Python three, although Python 2 is the generally came across model of Python this present day (read extra approximately it in Python 2 as opposed to three section).
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Extra info for A Byte of Python
E. e. True). Comparisons can be chained arbitrarily: 3 < 5 < 7 gives True. Compares if the objects x = 2; y = 2; x are equal == y returns True. x = 'str'; y = 'stR'; x == y returns False. x = 'str'; y = 'str'; x == y re20 Operators and Expressions Operator Name Explanation Examples turns True. = y returns True. not Boolean NOT If x is True, it returns x = True; not y False. If x is False, returns False. it returns True. and Boolean AND x and y returns False if x is False, else it returns evaluation of y or Boolean OR If x is True, it returns x = True; y = True, else it returns eval- False; x or y reuation of y turns True.
Next, we assign the value 2 to x. The name x is local to our function. So, when we change the value of x in the function, the x defined in the main block remains unaffected. In the last print statement, we confirm that the value of x in the main block is actually unaffected. Using the global statement If you want to assign a value to a name defined outside the function, then you have to tell Python that the name is not local, but it is global. We do this using the global statement. It is impossible to assign a value to a variable defined outside a function without the global statement.
Once you have created a list, you can add, remove or search for items in the list. e. this type can be altered. Quick introduction to Objects and Classes Although, I've been generally delaying the discussion of objects and classes till now, a little explanation is needed right now so that you can understand lists better. We will still explore this topic in detail in its own chapter. A list is an example of usage of objects and classes. When you use a variable i and assign a value to it, say integer 5 to it, you can think of it as creating an object (instance) i of class (type) int.