return random values from a stack python
I am trying to return 5 values from a stack and displaying it out. May I ask how I can go about doing it?
Attached is my code on how to solve the problem.
import random
class Stack:
def __init__(self):
self.stack =
def isEmpty(self):
return self.size() == 0
def push(self, item):
self.stack.append(item)
def peek(self) :
if self.size()>0 :
return self.stack[-1]
else :
return None
def pop(self):
return self.stack.pop()
def size(self):
return len(self.stack)
def randomFive(self):
return self[random.randint(0,len(self)-1)]
list = Stack()
list.push("Tom")
list.push("John")
list.push("Peter")
list.push("Harry")
list.push("Jerry")
for i in range(0, list.size()):
five = list.randomFive()
The error shown is:
return self[random.randint(0,len(self)-1)]
TypeError: object of type 'Stack' has no len()
python python-3.x random stack
edited Nov 24 '18 at 12:13
Azat Ibrakov
4,10271530
asked Nov 24 '18 at 5:58
Wei LongWei Long
111
add a comment |
I am trying to return 5 values from a stack and displaying it out. May I ask how I can go about doing it?
Attached is my code on how to solve the problem.
import random
class Stack:
def __init__(self):
self.stack =
def isEmpty(self):
return self.size() == 0
def push(self, item):
self.stack.append(item)
def peek(self) :
if self.size()>0 :
return self.stack[-1]
else :
return None
def pop(self):
return self.stack.pop()
def size(self):
return len(self.stack)
def randomFive(self):
return self[random.randint(0,len(self)-1)]
list = Stack()
list.push("Tom")
list.push("John")
list.push("Peter")
list.push("Harry")
list.push("Jerry")
for i in range(0, list.size()):
five = list.randomFive()
The error shown is:
return self[random.randint(0,len(self)-1)]
TypeError: object of type 'Stack' has no len()
python python-3.x random stack
edited Nov 24 '18 at 12:13
Azat Ibrakov
4,10271530
asked Nov 24 '18 at 5:58
Wei LongWei Long
111
try to not overwrite names of built-in objects likelist
– Azat Ibrakov
Nov 24 '18 at 6:04
alsoself[random.randint(0,len(self)-1)]probably should beself[random.randint(0,len(self.stack)-1)]or you should define__len__method
– Azat Ibrakov
Nov 24 '18 at 6:05
I have tried both methods but there is still an error which saysreturn(self[random.randint(0,len(self.stack)-1)]) AttributeError: 'Stack' object has no attribute 'stack
– Wei Long
Nov 25 '18 at 3:20
add a comment |
I am trying to return 5 values from a stack and displaying it out. May I ask how I can go about doing it?
Attached is my code on how to solve the problem.
import random
class Stack:
def __init__(self):
self.stack =
def isEmpty(self):
return self.size() == 0
def push(self, item):
self.stack.append(item)
def peek(self) :
if self.size()>0 :
return self.stack[-1]
else :
return None
def pop(self):
return self.stack.pop()
def size(self):
return len(self.stack)
def randomFive(self):
return self[random.randint(0,len(self)-1)]
list = Stack()
list.push("Tom")
list.push("John")
list.push("Peter")
list.push("Harry")
list.push("Jerry")
for i in range(0, list.size()):
five = list.randomFive()
The error shown is:
return self[random.randint(0,len(self)-1)]
TypeError: object of type 'Stack' has no len()
python python-3.x random stack
edited Nov 24 '18 at 12:13
Azat Ibrakov
4,10271530
asked Nov 24 '18 at 5:58
Wei LongWei Long
111
I am trying to return 5 values from a stack and displaying it out. May I ask how I can go about doing it?
Attached is my code on how to solve the problem.
import random
class Stack:
def __init__(self):
self.stack =
def isEmpty(self):
return self.size() == 0
def push(self, item):
self.stack.append(item)
def peek(self) :
if self.size()>0 :
return self.stack[-1]
else :
return None
def pop(self):
return self.stack.pop()
def size(self):
return len(self.stack)
def randomFive(self):
return self[random.randint(0,len(self)-1)]
list = Stack()
list.push("Tom")
list.push("John")
list.push("Peter")
list.push("Harry")
list.push("Jerry")
for i in range(0, list.size()):
five = list.randomFive()
The error shown is:
return self[random.randint(0,len(self)-1)]
TypeError: object of type 'Stack' has no len()
python python-3.x random stack
python python-3.x random stack
edited Nov 24 '18 at 12:13
Azat Ibrakov
4,10271530
asked Nov 24 '18 at 5:58
Wei LongWei Long
111
edited Nov 24 '18 at 12:13
Azat Ibrakov
4,10271530
asked Nov 24 '18 at 5:58
Wei LongWei Long
111
edited Nov 24 '18 at 12:13
Azat Ibrakov
4,10271530
edited Nov 24 '18 at 12:13
Azat Ibrakov
4,10271530
edited Nov 24 '18 at 12:13
Azat Ibrakov
4,10271530
4,10271530
asked Nov 24 '18 at 5:58
Wei LongWei Long
111
asked Nov 24 '18 at 5:58
Wei LongWei Long
111
asked Nov 24 '18 at 5:58
Wei LongWei Long
111
111
try to not overwrite names of built-in objects likelist
– Azat Ibrakov
Nov 24 '18 at 6:04
alsoself[random.randint(0,len(self)-1)]probably should beself[random.randint(0,len(self.stack)-1)]or you should define__len__method
– Azat Ibrakov
Nov 24 '18 at 6:05
I have tried both methods but there is still an error which saysreturn(self[random.randint(0,len(self.stack)-1)]) AttributeError: 'Stack' object has no attribute 'stack
– Wei Long
Nov 25 '18 at 3:20
add a comment |
try to not overwrite names of built-in objects likelist
– Azat Ibrakov
Nov 24 '18 at 6:04
alsoself[random.randint(0,len(self)-1)]probably should beself[random.randint(0,len(self.stack)-1)]or you should define__len__method
– Azat Ibrakov
Nov 24 '18 at 6:05
I have tried both methods but there is still an error which saysreturn(self[random.randint(0,len(self.stack)-1)]) AttributeError: 'Stack' object has no attribute 'stack
– Wei Long
Nov 25 '18 at 3:20
try to not overwrite names of built-in objects like
list– Azat Ibrakov
Nov 24 '18 at 6:04
try to not overwrite names of built-in objects like
list– Azat Ibrakov
Nov 24 '18 at 6:04
also
self[random.randint(0,len(self)-1)] probably should be self[random.randint(0,len(self.stack)-1)] or you should define __len__ method– Azat Ibrakov
Nov 24 '18 at 6:05
also
self[random.randint(0,len(self)-1)] probably should be self[random.randint(0,len(self.stack)-1)] or you should define __len__ method– Azat Ibrakov
Nov 24 '18 at 6:05
I have tried both methods but there is still an error which says
return(self[random.randint(0,len(self.stack)-1)]) AttributeError: 'Stack' object has no attribute 'stack– Wei Long
Nov 25 '18 at 3:20
I have tried both methods but there is still an error which says
return(self[random.randint(0,len(self.stack)-1)]) AttributeError: 'Stack' object has no attribute 'stack– Wei Long
Nov 25 '18 at 3:20
add a comment |
1 Answer
1
active
oldest
votes
Error is caused by statement in randomFive method
self[random.randint(0,len(self)-1)]
because self is an instance of Stack which has no __len__ method available and for user-defined classes len built-in function tries to call it and raises an error if there is no any (more info at this thread).
Fast fix would be to change it to
self[random.randint(0,len(self.stack)-1)]
but in longer perspective it will be better to define your own __len__ method like
class Stack:
...
def __len__(self):
return len(self.stack)
after that your original randomFive method should work.
answered Nov 24 '18 at 6:09
Azat IbrakovAzat Ibrakov
4,10271530
add a comment |
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1 Answer
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active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Error is caused by statement in randomFive method
self[random.randint(0,len(self)-1)]
because self is an instance of Stack which has no __len__ method available and for user-defined classes len built-in function tries to call it and raises an error if there is no any (more info at this thread).
Fast fix would be to change it to
self[random.randint(0,len(self.stack)-1)]
but in longer perspective it will be better to define your own __len__ method like
class Stack:
...
def __len__(self):
return len(self.stack)
after that your original randomFive method should work.
answered Nov 24 '18 at 6:09
Azat IbrakovAzat Ibrakov
4,10271530
add a comment |
Error is caused by statement in randomFive method
self[random.randint(0,len(self)-1)]
because self is an instance of Stack which has no __len__ method available and for user-defined classes len built-in function tries to call it and raises an error if there is no any (more info at this thread).
Fast fix would be to change it to
self[random.randint(0,len(self.stack)-1)]
but in longer perspective it will be better to define your own __len__ method like
class Stack:
...
def __len__(self):
return len(self.stack)
after that your original randomFive method should work.
answered Nov 24 '18 at 6:09
Azat IbrakovAzat Ibrakov
4,10271530
add a comment |
Error is caused by statement in randomFive method
self[random.randint(0,len(self)-1)]
because self is an instance of Stack which has no __len__ method available and for user-defined classes len built-in function tries to call it and raises an error if there is no any (more info at this thread).
Fast fix would be to change it to
self[random.randint(0,len(self.stack)-1)]
but in longer perspective it will be better to define your own __len__ method like
class Stack:
...
def __len__(self):
return len(self.stack)
after that your original randomFive method should work.
answered Nov 24 '18 at 6:09
Azat IbrakovAzat Ibrakov
4,10271530
Error is caused by statement in randomFive method
self[random.randint(0,len(self)-1)]
because self is an instance of Stack which has no __len__ method available and for user-defined classes len built-in function tries to call it and raises an error if there is no any (more info at this thread).
Fast fix would be to change it to
self[random.randint(0,len(self.stack)-1)]
but in longer perspective it will be better to define your own __len__ method like
class Stack:
...
def __len__(self):
return len(self.stack)
after that your original randomFive method should work.
answered Nov 24 '18 at 6:09
Azat IbrakovAzat Ibrakov
4,10271530
edited Nov 24 '18 at 6:17
answered Nov 24 '18 at 6:09
Azat IbrakovAzat Ibrakov
4,10271530
answered Nov 24 '18 at 6:09
Azat IbrakovAzat Ibrakov
4,10271530
answered Nov 24 '18 at 6:09
Azat IbrakovAzat Ibrakov
4,10271530
4,10271530
add a comment |
add a comment |
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try to not overwrite names of built-in objects like
list– Azat Ibrakov
Nov 24 '18 at 6:04
also
self[random.randint(0,len(self)-1)]probably should beself[random.randint(0,len(self.stack)-1)]or you should define__len__method– Azat Ibrakov
Nov 24 '18 at 6:05
I have tried both methods but there is still an error which says
return(self[random.randint(0,len(self.stack)-1)]) AttributeError: 'Stack' object has no attribute 'stack– Wei Long
Nov 25 '18 at 3:20