def average(*args):
sum = 0
if len(args)==0:
return sum
for item in args:
sum += item
avg = sum / len(args)
return avg
average()
sum = 0
if len(args)==0:
return sum
for item in args:
sum += item
avg = sum / len(args)
return avg
average()
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def greet(n='world'):
print('hello'+str(n))
greet()
greet(12)
print('hello'+str(n))
greet()
greet(12)
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# coding=utf-8
def sub_sum(L):
num = 1
sum2 = 0
sum1 = 0
for item in L:
if num % 2 == 0:
sum2 += item
num += 1
else:
sum1 += item
num += 1
return sum1,sum2
L = [1,2,3,4,5,6]
print(sub_sum(L))
def sub_sum(L):
num = 1
sum2 = 0
sum1 = 0
for item in L:
if num % 2 == 0:
sum2 += item
num += 1
else:
sum1 += item
num += 1
return sum1,sum2
L = [1,2,3,4,5,6]
print(sub_sum(L))
2021-03-26
# Enter a code
def square_of_sum(L):
result = 0
for num in L:
result += num*num
return result
L2 = [1,2,3]
print(square_of_sum(L2))
def square_of_sum(L):
result = 0
for num in L:
result += num*num
return result
L2 = [1,2,3]
print(square_of_sum(L2))
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# Enter a code
s1 = set([1, 2, 3, 4, 5])
s2 = set([1, 2, 3, 4, 5, 6, 7, 8, 9])
if s1.isdisjoint(s2):
print('没有重复元素')
if s1.isdisjoint(s2) == False:
for item in s1:
if item in s2:
print(item)
s1 = set([1, 2, 3, 4, 5])
s2 = set([1, 2, 3, 4, 5, 6, 7, 8, 9])
if s1.isdisjoint(s2):
print('没有重复元素')
if s1.isdisjoint(s2) == False:
for item in s1:
if item in s2:
print(item)
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L = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
S = set([1, 3, 5, 7, 9, 11])
for item in L:
if item in S:
S.remove(item)
else :
S.add(item)
print(S)
S = set([1, 3, 5, 7, 9, 11])
for item in L:
if item in S:
S.remove(item)
else :
S.add(item)
print(S)
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# Enter a code
s = set(['Alice', 'Bob', 'Candy', 'David', 'Ellena'])
print(s)
s = set(['Alice', 'Bob', 'Candy', 'David', 'Ellena'])
print(s)
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num = 0
d = {'Alice': [50, 61, 66], 'Bob': [80, 61, 66], 'Candy': [88, 75, 90]}
for key in d.values():
num += 1
print(num)
d = {'Alice': [50, 61, 66], 'Bob': [80, 61, 66], 'Candy': [88, 75, 90]}
for key in d.values():
num += 1
print(num)
2021-03-26
# coding=utf-8
def my_sum(n):
sum=0
for v in range(1, n+1):
sum=sum+v
return sum
print(my_sum(100))
def digui(a):
if a==1:
return 1
return a+digui(a-1)
print(digui(100))
def my_sum(n):
sum=0
for v in range(1, n+1):
sum=sum+v
return sum
print(my_sum(100))
def digui(a):
if a==1:
return 1
return a+digui(a-1)
print(digui(100))
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d = {
'Alice': 45,
'Bob': 60,
'Candy': 75,
'David': 86,
'Ellena': 49
}
print(d)
if 'Alice' in d.keys(): #用 if 'Alice' in d: 也一样
d.pop('Alice')
print(d)
'Alice': 45,
'Bob': 60,
'Candy': 75,
'David': 86,
'Ellena': 49
}
print(d)
if 'Alice' in d.keys(): #用 if 'Alice' in d: 也一样
d.pop('Alice')
print(d)
2021-03-26
d = {
'Alice': 45,
'Bob': 60,
'Candy': 75,
'David': 86,
'Ellena': 49
}
if 'Alice' in d:
template = d['Alice']
d['Alice'] = [template,60]
print(d)
'Alice': 45,
'Bob': 60,
'Candy': 75,
'David': 86,
'Ellena': 49
}
if 'Alice' in d:
template = d['Alice']
d['Alice'] = [template,60]
print(d)
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d = {
'Alice': 45,
'Bob': 60,
'Candy': 75,
'David': 86,
'Ellena': 49
}
L = ['Alice', 'Bob', 'Candy', 'Mimi', 'David']
for i in L:
print(d.get(i))
'Alice': 45,
'Bob': 60,
'Candy': 75,
'David': 86,
'Ellena': 49
}
L = ['Alice', 'Bob', 'Candy', 'Mimi', 'David']
for i in L:
print(d.get(i))
2021-03-26
def sub_sum(L):
global sum1,sum2
n=1
sum1=0
sum2=0
for v in L:
if n%2==0:
sum1=sum1+v
else:
sum2=sum2+v
n+=1
return sum1,sum2
l=[1,2,3,4,5,6,7,8]
print(sub_sum(l))
print('奇数的和='+str(sum2))
print('偶数的和='+str(sum1))
global sum1,sum2
n=1
sum1=0
sum2=0
for v in L:
if n%2==0:
sum1=sum1+v
else:
sum2=sum2+v
n+=1
return sum1,sum2
l=[1,2,3,4,5,6,7,8]
print(sub_sum(l))
print('奇数的和='+str(sum2))
print('偶数的和='+str(sum1))
2021-03-26