根据如下dict,打印出Alice, Bob, Candy, Mimi, David的成绩,当同学不存在时,打印None。
d = {
'Alice': 45,
'Bob': 60,
'Candy': 75,
'David': 86,
'Ellena': 49
}
d = {
'Alice': 45,
'Bob': 60,
'Candy': 75,
'David': 86,
'Ellena': 49
}
2022-09-21
num1=0
sum1=0
for num in L:
sum1 = sum1 + num
num1=num1 + 1
print(sum1/num1)
sum1=0
for num in L:
sum1 = sum1 + num
num1=num1 + 1
print(sum1/num1)
2022-09-20
def info(**kwargs):
names_list=kwargs['names']
gender_list=kwargs['gender']
age_list=kwargs['age']
n=0
for name in names_list:
gender=gender_list[n]
age=age_list[n]
print('name:{},gender:{},age:{}'.format(name,gender,age))
n+=1
names_list=kwargs['names']
gender_list=kwargs['gender']
age_list=kwargs['age']
n=0
for name in names_list:
gender=gender_list[n]
age=age_list[n]
print('name:{},gender:{},age:{}'.format(name,gender,age))
n+=1
2022-09-18
def greet(name='world'):
print('hello,'+name+'.')
return
greet('everyone')
print('hello,'+name+'.')
return
greet('everyone')
2022-09-17
def func(l):
if isinstance(l,list):
sum=0
for n in l:
sum+=n
return sum
elif isinstance(l,tuple):
sum=1
for n in l:
sum*=n
return sum
else:
print('wrong')
l1=[1,2]
l2=(1,2)
print(func(l1))
print(func(l2))
if isinstance(l,list):
sum=0
for n in l:
sum+=n
return sum
elif isinstance(l,tuple):
sum=1
for n in l:
sum*=n
return sum
else:
print('wrong')
l1=[1,2]
l2=(1,2)
print(func(l1))
print(func(l2))
2022-09-17
def sumofnum(m):
n=1
sum=0
while n <= m:
sum+=n
n+=1
return sum
print(sumofnum(10))
def sum_of_num(m):
if m == 1:
return 1
return m+sum_of_num(m-1)
print(sum_of_num(100))
n=1
sum=0
while n <= m:
sum+=n
n+=1
return sum
print(sumofnum(10))
def sum_of_num(m):
if m == 1:
return 1
return m+sum_of_num(m-1)
print(sum_of_num(100))
2022-09-17
def sub_sum(list):
n=0
sum1=0
sum2=0
L=list[n]
for L in list:
if n%2==0:
sum1+=L
else:
sum2+=L
n=n+1
return sum1,sum2
list=[1,2,3,4]
print(sub_sum(list))
n=0
sum1=0
sum2=0
L=list[n]
for L in list:
if n%2==0:
sum1+=L
else:
sum2+=L
n=n+1
return sum1,sum2
list=[1,2,3,4]
print(sub_sum(list))
2022-09-16
s1 = set([1, 2, 3, 4, 5])
s2 = set([1, 2, 3, 4, 5, 6, 7, 8, 9])
s3=set()
for num in s1:
if num in s2:
s3.add(num)
for num in s2:
if num in s1:
s3.add(num)
print(s3)
s2 = set([1, 2, 3, 4, 5, 6, 7, 8, 9])
s3=set()
for num in s1:
if num in s2:
s3.add(num)
for num in s2:
if num in s1:
s3.add(num)
print(s3)
2022-09-16
L = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
S = set([1, 3, 5, 7, 9, 11])
for num in L:
if num in S:
S.remove(num)
else:
S.add(num)
print(S)
S = set([1, 3, 5, 7, 9, 11])
for num in L:
if num in S:
S.remove(num)
else:
S.add(num)
print(S)
2022-09-16
names=[]
name_set=set(names)
new_names=['Jenny', 'Ellena', 'Alice', 'Candy', 'David', 'Hally', 'Bob', 'Isen', 'Karl']
for name in new_names:
name_set.add(name)
print(name_set)
name_set=set(names)
new_names=['Jenny', 'Ellena', 'Alice', 'Candy', 'David', 'Hally', 'Bob', 'Isen', 'Karl']
for name in new_names:
name_set.add(name)
print(name_set)
2022-09-16
d = {
'Alice': 45,
'Bob': 60,
'Candy': 75,
'David': 86,
'Ellena': 49
}
for key in d:
print(d.get(key))
'Alice': 45,
'Bob': 60,
'Candy': 75,
'David': 86,
'Ellena': 49
}
for key in d:
print(d.get(key))
2022-09-14
L=[[1,2,3],[5,3,2],[7,3,2]]
for c in L:
l=c[0]
w=c[1]
h=c[2]
V=l*w*h
print(V)
for c in L:
l=c[0]
w=c[1]
h=c[2]
V=l*w*h
print(V)
2022-09-12
L=['Alice', 'Bob', 'Candy', 'David', 'Ellena']
L[0]='Ellena'
L[1]='Alice'
L[2]='Candy'
L[3]='David'
L[4]='Bob'
print(L)
L[0]='Ellena'
L[1]='Alice'
L[2]='Candy'
L[3]='David'
L[4]='Bob'
print(L)
2022-09-12