L = [75, 92, 59, 68, 99]
sum = 0
for cj in L:
sum += cj
print(sum / len(L))
sum = 0
for cj in L:
sum += cj
print(sum / len(L))
2021-04-08
age = 0 #python虽然不要先声明变量类型 但是必须要先有这个变量才能用于逻辑判断
if age < 18:
print('teenager')
else:
print('adult')
if age < 18:
print('teenager')
else:
print('adult')
2021-04-08
这个任务题目不严谨,可以理解为按List前后顺序的第一名第二名第三名,即依次打印出L[0]、L[1]、L[2];也可以理解为按成绩高低的第一名第二名第三名,即依次打印出L[0]、L[1]、L[4]
2021-04-07
# Enter a code
L = [[1, 2, 3], [5, 3, 2], [7, 3, 2]]
List = []
for i in L:
s = (i[0] * i[1] * 2) + (i[0] * i[2] * 2) + (i[1] * i[2] * 2)
List.append(s)
print(List)
L = [[1, 2, 3], [5, 3, 2], [7, 3, 2]]
List = []
for i in L:
s = (i[0] * i[1] * 2) + (i[0] * i[2] * 2) + (i[1] * i[2] * 2)
List.append(s)
print(List)
2021-04-07
s1 = set([1, 2, 3, 4, 5])
s2 = set([1, 2, 3, 4, 5, 6, 7, 8, 9])
s1.isdisjoint(s2)
print(s1)
s2 = set([1, 2, 3, 4, 5, 6, 7, 8, 9])
s1.isdisjoint(s2)
print(s1)
2021-04-07
# Enter a code
num = 1
mul = 1
while num <= 10:
mul = num * mul
num = num + 1
print(mul)#过程结果
print(mul)#最终结果
num = 1
mul = 1
while num <= 10:
mul = num * mul
num = num + 1
print(mul)#过程结果
print(mul)#最终结果
2021-04-06
a = 0
s = 0
while True:
if a > 1000:
break
s = s + a
a = a + 2
print(s)
s = 0
while True:
if a > 1000:
break
s = s + a
a = a + 2
print(s)
2021-04-06
d = {
'Alice': 45,
'Bob': 60,
'Candy': 75,
'David': 86,
'Ellena': 49
}
d['Alice'] = 60
print(d)
# ==> {'Alice': 60, 'Bob': 60, 'Candy': 75, 'David': 86, 'Ellena': 49}
'Alice': 45,
'Bob': 60,
'Candy': 75,
'David': 86,
'Ellena': 49
}
d['Alice'] = 60
print(d)
# ==> {'Alice': 60, 'Bob': 60, 'Candy': 75, 'David': 86, 'Ellena': 49}
2021-04-06
num=0
sum=0
while True:
if num>1000:
break
sum=sum+num
num+=2
print(sum)
#这样也可以
sum=0
while True:
if num>1000:
break
sum=sum+num
num+=2
print(sum)
#这样也可以
2021-04-04
a = r''''\"To be,or not to be\":that is the question.\n
Whether it\'s nobler in the mind to suffer.'
'''
print(a)
Whether it\'s nobler in the mind to suffer.'
'''
print(a)
2021-04-04
答案应该是:
s1 = 'ABC'
s2 = '123'
s3='xyz'
for z in s3:
for x in s1:
for y in s2:
print(x + y+ z);
print(x + z+ y);
print(y + x+ z);
print(y + z+ x);
print(z + x+ y);
print(z + y+ x);
s1 = 'ABC'
s2 = '123'
s3='xyz'
for z in s3:
for x in s1:
for y in s2:
print(x + y+ z);
print(x + z+ y);
print(y + x+ z);
print(y + z+ x);
print(z + x+ y);
print(z + y+ x);
2021-04-04
# Enter a code
L = [75, 92, 59, 68, 99]
sum = 0.0
for s in L:
sum = sum + s
ave = sum / len(L)
print(ave)
L = [75, 92, 59, 68, 99]
sum = 0.0
for s in L:
sum = sum + s
ave = sum / len(L)
print(ave)
2021-04-03