By Swaroop C H
‘A Byte of Python’ is a unfastened publication on programming utilizing the Python language. It serves as an academic or advisor to the Python language for a newbie viewers. If all you recognize approximately desktops is tips on how to shop textual content records, then this can be the ebook for you. This publication is written for the most recent Python three, even supposing Python 2 is the widely discovered model of Python at the present time (read extra approximately it in Python 2 as opposed to three section).
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Additional resources for A Byte of Python
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. Short-circuit evaluation applies here as well. x = False; y = True; x and y returns False since x is False. In this case, Python will not evaluate y since it knows that the value of the expression will has to be false (since x is False).
Therefore the %s is replaced by the value of the variable name and so on. This usage of the print statement makes writing output extremely easy and avoids lot of string manipulation to achieve the same. It also avoids using commas everywhere as we have done till now. Most of the time, you can just use the %s specification and let Python take care of the rest for you. This works even for numbers. However, you may want to give the correct specifications since this adds one level of checking that your program is correct.
In the second usage of say, we supply both the string and an argument 5 stating that we want to say the string message 5 times. e. you cannot have a parameter with a default argument value before a parameter without a default argument value in the order of parameters declared in the function parameter list. This is because the values are assigned to the parameters by position. For example, def func(a, b=5) is valid, but def func(a=5, b) is not valid. Keyword Arguments If you have some functions with many parameters and you want to specify only some of them, then you can give values for such parameters by naming them - this is called keyword arguments - we use the name (keyword) instead of the position (which we have been using all along) to specify the arguments to the function.
A Byte of Python by Swaroop C H