Printing in a class python

Question

I'm having trouble with trying to print the stats of the player in a class function. When I run it, it doesn't print.

class Player(object):
    def __init__(self, name, hp, dmg, lvl, inventory, speed):
       self.name = name
       self.hp = hp
       self.dmg = dmg
       self.lvl = lvl
       self.inventory = inventory
       self.speed = speed

    def printStats(self):
       return("Health: " + self.hp + ", Attack Damage: " + self.dmg + ", Level: " + self.lvl + ", Speed: " + self.speed)

link = Player("Link", 10, 3, 1, {}, 3)
link.printStats

You don't call the function...

kindall
– kindall

2015-12-18 20:10:43 +00:00
Commented Dec 18, 2015 at 20:10 — kindall
– kindall, Commented Dec 18, 2015 at 20:10

Bryan Oakley · Accepted Answer · 2015-12-18 20:16:45Z

If you want to print stats, you must print the stats.

def printStats(self):
    print("Health: " + ...)

You also need to actually call the function (notice the trailing parenthesis):

link.printStats()

A somewhat more pythonic solution would be to modify what gets printed when you print the object. You can do that by defining the method __str__. Then, just pass your object to the print command.

class Player(object):
    def __init__(self, name, hp, dmg, lvl, inventory, speed):
       self.name = name
       self.hp = hp
       self.dmg = dmg
       self.lvl = lvl
       self.inventory = inventory
       self.speed = speed

    def __str__(self):
        return "Health: %s Attack Damage: %s Level: %s Speed: %s" % (self.hp, self.dmg, self.lvl, self.speed)

link = Player("Link", 10, 3, 1, {}, 3)
print(link)

Ali Nikneshan · Accepted Answer · 2015-12-18 20:14:42Z

Instead you can use __repr__(self) function:

class Player(object):
    def __init__(self, name, hp, dmg, lvl, inventory, speed):
        self.name = name
        self.hp = hp
        self.dmg = dmg
        self.lvl = lvl
        self.inventory = inventory
        self.speed = speed

    def __repr__(self):
         return("Health: " + self.hp + ", Attack Damage: " + self.dmg + ", Level: " + self.lvl + ", Speed: " + self.speed)


link = Player("Link", 10, 3, 1, {}, 3)
print link

noɥʇʎԀʎzɐɹƆ · Accepted Answer · 2015-12-18 20:25:17Z

When you run a program in IDLE or the REPL, python automatically prints the return value of the function. So replace this:

def printStats(self):
    return("Health: " + ...)

with this:

def printStats(self):
    print("Health: " + ...)

You also failed to actually call the function (i.e. run).

link.printStats

simply says "Ok, find me the printStats function from link."

You didn't run it, you simply retrieved it.

Try this instead:

link.printStats()

BTW, python convention says that you should not use CamelCase lettering for functions. Use name_with_underscores instead.

0xtvarun · Accepted Answer · 2015-12-18 20:30:14Z

0

depending on what version of python you are running in you'll need to do this

for python 2.7

    print link.printStats()

for python 3.x

    print(link.printStats())

edited Dec 18, 2015 at 20:30

answered Dec 18, 2015 at 20:12

0xtvarun

6986 silver badges19 bronze badges

2 Comments

Bryan Oakley Over a year ago

unless you actually call the function, nothing is going to get printed or returned.

Morgan Thrapp Over a year ago

@VarunTewari Yes, but that's not what you have.

Collectives™ on Stack Overflow

Printing in a class python

4 Answers 4

Comments

Comments

Comments

2 Comments

Hot Network Questions

Collectives™ on Stack Overflow

4 Answers 4

Comments

Comments

Comments

2 Comments

Related