WF={"Angel Falls":3211.7, "Tugela Falls":3110.2, "Three Sisters Fall":2998.5, "Olo'supena Falls":2953.3, "Yumbilla Falls":2940}
Referring to above, when I have delete the "Angel Falls" using code below:
Waterfall = dict(WF)
del Waterfall["Angel Falls"]
print(len(WF))
It will give me an answer of 5. Why it is not 4 instead since I have deleted one item in the dict?
CodePudding user response：
It's because Waterfall = dict(WF) create a copy of WF dictionary.
So you have 2 objects :
- WF
- Waterfall
Your remove operation is on Waterfall dict object.
Then you print the WF dict object which has not changed.
Print Waterfall to view change.