this syntax is roughly equivalent to the following codes [for item in iterable if condition for item in iterable if condition for itemn in iterablenif conditionns append(expressionto illustratehere are some more examplesa [- , , ,- , , 'abcc [ * for in ad [ for in if > [( ,yfor in for in if [( , )( , )( , ) [math sqrt( * + *yfor , in fc [- , , ,- , , [ , , , [( ,' '),( ,' '),( ,' ')( ,' '),( ,' '),( ,' ')( ,' '),( ,' '),( ,' ')( ,' '),( ,' '),( ,' ') [ the sequences supplied to list comprehension don' have to be the same length because they're iterated over their contents using nested set of for loopsas previously shown the resulting list contains successive values of expressions the if clause is optionalhoweverif it' usedexpression is evaluated and added to the result only if condition is true if list comprehension is used to construct list of tuplesthe tuple values must be enclosed in parentheses for example[( ,yfor in for in bis legal syntaxwhereas [ , for in for in bis not finallyit is important to note that in python the iteration variables defined within list comprehension are evaluated within the current scope and remain defined after the list comprehension has executed for examplein [ for in ]the iteration variable overwrites any previously defined value of and is set to the value of the last item in after the resulting list is created fortunatelythis is not the case in python where the iteration variable remains private generator expressions generator expression is an object that carries out the same computation as list comprehensionbut which iteratively produces the result the syntax is the same as for list comprehensions except that you use parentheses instead of square brackets here' an example(expression for item in iterable if condition for item in iterable if condition for itemn in iterablen if conditionnf lib fl ff