同叔练级之路

摘要： pyton 程序内容的颠倒，运用 [](列表)def reverse_string(s): """Returns the reversal of the given string.""" result = "" for char in s: result = char... 阅读全文

摘要： import simpleguiimport math# global variablesball_pos = [50,50]ball_radius = 12ball_color = 'red'# help fuctions# classes# define event handlers # ... 阅读全文