why i can't get the result of appending list in python-CodePudding

d={}
for i in range (5):
    d['key']=i
    lst.append(d)
print(lst) 
>>>[{'key': 4}, {'key': 4}, {'key': 4}, {'key': 4}, {'key': 4}]

Why i didn't got this result plz :>>>[{'key': 0}, {'key': 1}, {'key': 2}, {'key': 3}, {'key': 4}] ?

CodePudding user response：

This code will work:

lst = []
for i in range(1, 6):
    lst.append({"key", i})
print(lst)

The problem was that you are appending the variable d to lst. the value of lst is now [d, d, d, d, d]. When printing, this evaluates to d's current value, which happens to be {'key', 4}. My code appends the value of d to the list without creating d. This is at least my interpretation of this. Could be wrong.