L = 'Alice', 'Bob', 'Candy', 'Mimi', 'David'
d = {
'Alice': 45,
'Bob': 60,
'Candy': 75,
'David': 86,
'Ellena': 49
}
for LL in L:
if LL in d:
print(d.get(LL))
else:
print('None')
d = {
'Alice': 45,
'Bob': 60,
'Candy': 75,
'David': 86,
'Ellena': 49
}
for LL in L:
if LL in d:
print(d.get(LL))
else:
print('None')
2023-10-22
d = {
'Alice': 45,
'Bob': 60,
'Candy': 75,
'David': 86,
'Ellena': 49
}
d['Gaven'] = 86
print(d)
'Alice': 45,
'Bob': 60,
'Candy': 75,
'David': 86,
'Ellena': 49
}
d['Gaven'] = 86
print(d)
2023-10-22
i = 0
j = 0
while i <= 1000:
if i%2 != 0:
continue
j = i+j
i += 1
print(j)
j = 0
while i <= 1000:
if i%2 != 0:
continue
j = i+j
i += 1
print(j)
2023-10-21
T = (1,'CH', [3,4])
t = list(T)
t[2] = tuple(T[2])
t = tuple(t)
print(t)
t = list(T)
t[2] = tuple(T[2])
t = tuple(t)
print(t)
2023-10-21
num = 0
T = ((1+2), ((1+2),), ('a'+'b'), (1, ), (1,2,3,4,5))
for T1 in T:
if isinstance(T1, tuple):
num = num + 1
else:
num = num + 0
print(num)
T = ((1+2), ((1+2),), ('a'+'b'), (1, ), (1,2,3,4,5))
for T1 in T:
if isinstance(T1, tuple):
num = num + 1
else:
num = num + 0
print(num)
2023-10-21
num = (100, 69, 29, 100, 72, 99, 98, 100, 75, 100, 100, 42, 88, 100)
print(num.count(100))
print(num.count(100))
2023-10-21
num = (0, 1, 2, 3, 4, 5, 6, 7, 8, 9)
num1 = list(num)
print(num1)
num1 = list(num)
print(num1)
2023-10-19
num = (0, 1, 2, 3, 4, 5, 6, 7, 8, 9)
num1 = list(num)
print(num1)
num1 = list(num)
print(num1)
2023-10-19
C1 = [1,2,3]
C2 = [5,3,2]
C3 = [7,3,2]
CC = [C1,C2,C3]
for C in CC:
area = (C[0]+C[1]+C[2])*2
print(area)
C2 = [5,3,2]
C3 = [7,3,2]
CC = [C1,C2,C3]
for C in CC:
area = (C[0]+C[1]+C[2])*2
print(area)
2023-10-19
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)
2023-10-19
name = ['Alice', 'Bob', 'Candy', 'David', 'Ellena']
name.insert(0,name.pop())
name.insert(2,name.pop(3))
name.insert(3,name.pop())
print(name)
name.insert(0,name.pop())
name.insert(2,name.pop(3))
name.insert(3,name.pop())
print(name)
2023-10-19
def sum(list):
sum=0
for item in list:
sum=sum+item*item
return sum
list=[]
for i in range(1,101):
list.append(i)
print(sum(list))
sum=0
for item in list:
sum=sum+item*item
return sum
list=[]
for i in range(1,101):
list.append(i)
print(sum(list))
2023-10-19
L = ['Alice', 'Bob', 'Candy', 'David', 'Ellena']
name1 = L.pop(2)
print(name1)
name2 = L.pop(2)
print(name2)
print(L)
name1 = L.pop(2)
print(name1)
name2 = L.pop(2)
print(name2)
print(L)
2023-10-18
names = ['Alice', 'Bob','Candy', 'David', 'Ellena']
names.append('gen')
names.append('Phoebe')
names.insert(7,'zero')
print(names)
names.append('gen')
names.append('Phoebe')
names.insert(7,'zero')
print(names)
2023-10-17
最贊回答 / 慕運(yùn)維0462457
不是所有情況都可以從0開始取數(shù)的，這個(gè)形式的代碼只有在從0開始取數(shù)時(shí)看著更簡(jiǎn)便，并且也沒有從代碼邏輯上體現(xiàn)出要“偶數(shù)”
2023-10-17
最新回答 / 慕粉1858098231
因?yàn)槭且斜碓仄椒胶停员仨氁靡粋€(gè)‘容器’存儲(chǔ)每個(gè)元素平方和的累加值，所以需要‘sum’;其次關(guān)于為什么sum=0，python是解釋型語(yǔ)言，變量不需要聲明，但需要進(jìn)行初始化。如果不進(jìn)行初始化（即給sum賦值），系統(tǒng)只是為sum分配了一個(gè)內(nèi)存空間，sum就如同一個(gè)只有軀殼，沒有靈魂的‘行尸走肉’，就沒有辦法和其他數(shù)據(jù)進(jìn)行運(yùn)算，即sum=sum+x*x,就會(huì)出現(xiàn)報(bào)錯(cuò)。個(gè)人拙見，希望對(duì)你有用
2023-10-17