so has expanded with the advent of python here will briefly describe the mechanics of one of the main interfaces strings with followed by one or more format characters is target for inserting value into that string (this is quite similar to the printf function in cas an exampleconsider this stringin [ ]template ' % are worth $%din this string% means to format an argument as string number with decimal placesand % an integer to substitute arguments for these format parametersuse the binary operator with tuple of valuesin [ ]template ( 'argentine pesos' out[ ]' argentine pesos are worth $ string formatting is broad topicthere are multiple methods and numerous options and tweaks available to control how values are formatted in the resulting string to learn morei recommend you seek out more information on the web discuss general string processing as it relates to data analysis in more detail in booleans the two boolean values in python are written as true and false comparisons and other conditional expressions evaluate to either true or false boolean values are combined with the and and or keywordsin [ ]true and true out[ ]true in [ ]false or true out[ ]true almost all built-in python tops and any class defining the __nonzero__ magic method have true or false interpretation in an if statementin [ ] [ if aprint ' found something! found somethingin [ ] [if not bprint 'empty!emptymost objects in python have notion of trueor falseness for exampleempty sequences (listsdictstuplesetc are treated as false if used in control flow (as above with the empty list byou can see exactly what boolean value an object coerces to by invoking bool on it appendixpython language essentials www it-ebooks info