Linked Questions

3362 votes

44 answers

2.2m views

I wrote this class for testing: class PassByReference: def __init__(self): self.variable = 'Original' self.change(self.variable) print(self.variable) def change(self, ...

0 votes

1 answer

6k views

I thought I understood python's pass-by-reference and pass-by-value processing... can anyone explain what is the difference between pass-by-reference and pass-by-value in python

0 votes

3 answers

667 views

Consider the Python code below: def change_list(in_list): in_list = [1,2,3] def change_list_append(in_list): in_list.append(7) my_list = [1,2,3,4,5,6] change_list(my_list) print(my_list) ...

0 votes

0 answers

413 views

Scenario 1 : Mutable object like list def a(l): l[0] = 1 print("\nValue of l = {0} in a()".format(l)) def b(l): l = l + [9] print("\nValue of l = {0} in b()".format(l)) l = [0] a(l)...

0 votes

1 answer

94 views

I try this simple code: def chage_value(dict, key): dict[key] = 123 return dict my_dict = {'a': 1, 'b': 2} print(my_dict) chage_value(my_dict, 'a') print(my_dict) This gives me output: {'a'...

1 vote

0 answers

103 views

I'm trying to understand a weird behavior when using datetime inside python's dictionary. Code below is written to explain. I expected that the example of variable a and b will act the same as self.x ...

1 vote

0 answers

61 views

I try to create the list of object with some attributes like this. info.py import numpy as np class MapInfo(object): """docstring forInfomation.""" def __init__(self, arg): super(...

0 votes

0 answers

60 views

def y(v0,t): g=9.81 return v0*t - 0.5*g*t**2 v0 = 5 time = 0.6 print(y(v0,time)) in this code how does the computer understand the time variable even though the t variable is used in the code? I ...

0 votes

0 answers

36 views

def isCyclicUtil(graph,v,visit,parent): visit[v]= True for i in graph[v]: if visit[i]==False : if(isCyclicUtil(graph,i,visit,v)): return True ...

10 votes

5 answers

8k views

I sent a reference to a bool object, and I modified it within a method. After the method finished its execution, the value of the bool outside the method was unchanged. This leads me to believe that ...

4 votes

5 answers

5k views

What are the main differences, if any, of Python's argument passing rules vs C#'s argument passing rules? I'm very familiar with Python and only starting to learn C#. I was wondering if I could think ...

6 votes

4 answers

804 views

For a project I'm working on, I'm implementing a linked-list data-structure, which is based on the idea of a pair, which I define as: class Pair: def __init__(self, name, prefs, score): ...

2 votes

5 answers

496 views

A variable is set. Another variable is set to the first. The first changes value. The second does not. This has been the nature of programming since the dawn of time. >>> a = 1 >>&...

2 votes

6 answers

347 views

Well I'm just learning Python and I'm experiencing some strange behavior. I guess that garbage collector is responsible for that but I'm not sure. SORRY LADS I MESSED UP THE QUESTION I wanted ...

0 votes

1 answer

5k views

I'm trying to toggle a boolean with the help of a seperate function. If my research is correct, there are no pointers in Python (I'm starting to learn it right now) so I'm unsure how to fix this issue....