How to copy a dictionary and only edit the copy

Question

Can someone please explain this to me? This doesn\'t make any sense to me.

I copy a dictionary into another and edit the second and both are changed. Why is this hap

Answer 1

Copying by using a for loop:

orig = {"X2": 674.5, "X3": 245.0}

copy = {}
for key in orig:
    copy[key] = orig[key]

print(orig) # {'X2': 674.5, 'X3': 245.0}
print(copy) # {'X2': 674.5, 'X3': 245.0}
copy["X2"] = 808
print(orig) # {'X2': 674.5, 'X3': 245.0}
print(copy) # {'X2': 808, 'X3': 245.0}