Overload __str__ method for user-friendly message
Overload __str__
class MyClass(object):
def __init__(self, name):
self.name = name# w w w .j a va 2 s . co m
def __str__(self):
rep = "MyClass object\n"
rep += "name: " + self.name + "\n"
return rep
def __cmp__(self, other):
if self.name > other.name:
return 1
if self.name < other.name:
return -1
if self.name == other.name:
return 0
def talk(self):
print "Hi. I'm", self.name, "\n"
crit1 = MyClass("A")
crit1.talk()
crit2 = MyClass("B")
crit2.talk()
print crit1
print crit1.name
The code above generates the following result.
__str__ is tried first for user-friendly displays.
class Time60(object):
def __init__(self, hr, min):
self.hr = hr # w ww . ja va 2 s . com
self.min = min
def __str__(self):
return '%d:%d' % (self.hr, self.min)
mon = Time60(10, 30)
tue = Time60(11, 15)
print mon, tue
The code above generates the following result.
The following code uses __str__ to output message for an Employee class.
class Employee:# w ww . j a va2 s . c o m
def __init__( self, first, last ):
self.firstName = first
self.lastName = last
def __str__( self ):
return "%s %s" % ( self.firstName, self.lastName )
class HourlyWorker( Employee ):
def __init__( self, first, last, initHours, initWage ):
Employee.__init__( self, first, last )
self.hours = float( initHours )
self.wage = float( initWage )
def getPay( self ):
return self.hours * self.wage
def __str__( self ):
print "HourlyWorker.__str__ is executing"""
return "%s is an hourly worker with pay of $%.2f" % ( Employee.__str__( self ), self.getPay() )
hourly = HourlyWorker( "Bob", "Smith", 40.0, 10.00 )
print hourly
print hourly.__str__()
print HourlyWorker.__str__( hourly )
The code above generates the following result.
