写一个函数,统计字符串中的出现最高次数的字符,输出该字符,以及次数
def str_num(str1: str):
num = 0
num_i = ''
for i in str1:
if num < str1.count(i):
num = str1.count(i)
num_i = i
return num, num_i
print(str_num('strrinnnnngggg'))
声明一个类Point具有x,y坐标.功能是计算两点之间的距离
声明一个线段Line 具有start点end点,功能有计算线段长度,判断一个点是否在这个线段上
class Point:
def __init__(self, x, y):
self.x = x
self.y = y
def distance(self, other):
return ((self.x - other.x) ** 2 + (self.y - other.y) ** 2) ** 0.5
p1 = Point(1, 1)
p2 = Point(3, 3)
class Line:
def __init__(self, start, end):
self.start = start
self.end = end
def length(self):
return ((self.start.x - self.end.x) ** 2 + (self.end.y - self.end.y) ** 2) ** 0.5
# （y-y1）/(y2-y1)＝(x-x1)/(x2-x1) y = kx +b 斜率 = (y1-y2)/(x1-x2)
def in_line(self, other: Point):
if (other.y - self.start.y) / (self.end.y - self.start.y) == (other.x - self.start.x) / (
self.end.x - self.start.x):
if (self.start.y - self.end.y) / (self.start.x - self.end.x) > 0:
if self.end.y > other.y > self.start.y and self.end.x > other.x > self.start.x:
print('点在线段上')
else:
print('点不在线段上')
else:
if self.start.y > other.y > self.end.y and self.end.x > other.x > self.start.x:
print('点在线段上')
else:
print('点不在线段上')
print('点在直线上')
else:
print('点不在直线上')
l1 = Line(p1, p2)
p3 = Point(5, 5)
l1.in_line(p3)
