classes liz olsson balance howeverthere is nothing to prevent user from changing the attributes of the account directlya first_name 'some other namea balance number ' although it can be tempting to adjust bank account balance when neededit is not the intended use of the class directly manipulating attributes in this way will very often lead to errors in large software systemsand is considered bad programming style insteadattributes should always be changed by calling methodsin this casewithdraw and deposit many programming languages have constructions that can limit the access to attributes from outside the classso that any attempt to access them will lead to an error message when compiling or running the code python has no technical way to limit attribute accessbut it is common to mark attributes as protected by prefixing the name with an underscore ( _namethis convention tells other programmers that given attribute or method is not supposed to be accessed from outside the classeven though it is still technically possible to do so an account class with protected attributes can look like the followingclass bankaccountpdef __init__(selffirst_namelast_namenumberbalance)self _first_name first_name self _last_name name self _number number self _balance balance def deposit(selfamount)self _balance +amount def withdraw(selfamount)self _balance -amount def get_balance(self)return self _balance new read balance value def print_info(self)first self first_namelast self last_name number self numberbal self balance '{first{last}{number}balance{balance}print(swhen using this classit will still be technically possible to access the attributes directlyas in bankaccountp('john''olsson'' ' _number ' howeverall experienced python programmers will know that the second line is serious violation of good coding practice and will look for better