Python Help with 2d Array Error

[newb75]

I am trying to create a 2d array consisting of various attributes from an object, then sorting the array to find a specific min and its related values. I keep getting the error: list assignment index out of range

Here is some sample code:

_

while c < len(cool_stuff):
if cool_stuff[c].coolest_stuff = 0:
a_list = []
b_list = []
c_list = []
d_list = []
a_list.extend([cool_stuff[c].a_1,cool_stuff[c].a_2,cool_stuff.a_3,cool_stuff.a_4])

b_list.extend([cool_stuff[c].b_1,cool_stuff[c].b_2,cool_stuff[c].b_3,cool_stuff.b_4)


and so forth. Just assume proper indents.
Next is
col = int(len(d_list))
silly_array = [[0] * col for j in range(4)]
for d in range(len(d_list)):
silly_array[0][d] = int(a_list[d])

_

I keep getting an error message doing this. What is the problem.

 

[ratwolf]

I am trying to create a 2d array consisting of various attributes from an object, then sorting the array to find a specific min and its related values. I keep getting the error: list assignment index out of range

Here is some sample code:

while c < len(cool_stuff):
if cool_stuff[c].coolest_stuff = 0:
a_list = []
b_list = []
c_list = []
d_list = []
a_list.extend([cool_stuff[c].a_1,cool_stuff[c].a_2,cool_stuff.a_3,cool_stuff.a_4])

b_list.extend([cool_stuff[c].b_1,cool_stuff[c].b_2,cool_stuff[c].b_3,cool_stuff.b_4)


and so forth. Just assume proper indents.
Next is
col = int(len(d_list))
silly_array = [[0] * col for j in range(4)]
for d in range(len(d_list)):
silly_array[0][d] = int(a_list[d])


I keep getting an error message doing this. What is the problem.

import random
    
# dummy data
class Thing:
    def __init__(self, id_val):
        self.coolest_stuff = 0 # Set to 0 so the if-statement passes
        # Random values to simulate data
        self.a_1 = random.randint(1, 100)
        self.a_2 = random.randint(1, 100)
        self.b_1 = random.randint(1, 100)
        self.b_2 = random.randint(1, 100)

# simulating 'cool_stuff'
cool_stuff = [Thing(i) for i in range(5)]

# Initialize the main 2D array
silly_array = []

# Iterate through objects
for obj in cool_stuff:
    # Use '==' for comparison, not '='
    if obj.coolest_stuff == 0:
        
        # Build the row directly.         
        # This keeps related data together (a_1 belongs with b_1)
        # and ensures the list index never goes out of range.
        row = [
            obj.a_1,
            obj.a_2,
            obj.b_1,
            obj.b_2
        ]
        
        # Add the completed row to the main array
        silly_array.append(row)

# Output the raw array
print("--- The 2D Array ---")
for row in silly_array:
    print(row)

# --- SORTING & FINDING MIN ---

# For example sort by the first item in the row (Index 0, representing a_1)
# lambda x: x[0] tells Python to look at the first number in each row
silly_array.sort(key=lambda x: x[0])

print("\n--- Sorted by First Column (Min to Max) ---")
for row in silly_array:
    print(row)

# The row with the minimum value in the first column is now at index 0
min_row = silly_array[0]
print(f"\nMin Value: {min_row[0]}")
print(f"Related Values: {min_row[1:]}")

 

[newb75]

Thanks!