Python simple dictionary traversal and element deletion methods, python calendar dictionary elements

Python simple dictionary traversal and element deletion methods, python calendar dictionary elements

This document describes how to use Python to retrieve dictionaries and delete elements. We will share this with you for your reference. The details are as follows:

This method is problematic:

D = {'A': 1, 'B': 2, 'C': 3} for key in d: d. pop (key)

This error is reported: RuntimeError: dictionary changed size during iteration

This method is feasible for Python2. Python3 still reports the above error.

D = {'A': 1, 'B': 2, 'C': 3} for key in d. keys (): d. pop (key)

Python3 reports an error because the keys () function returns dict_keys instead of list. Python3 can be used as follows:

D = {'A': 1, 'B': 2, 'C': 3} for key in list (d): d. pop (key)