d = {
'Alice':45,
'Bob':60,
'Candy':75,
'David':86,
'Ellena':49,
}
print(d.get('Alice'))
print(d.get('Bob'))
print(d.get('Candy'))
print(d.get('David'))
print(d.get('Ellena'))
print(d.get('WGX'))
'Alice':45,
'Bob':60,
'Candy':75,
'David':86,
'Ellena':49,
}
print(d.get('Alice'))
print(d.get('Bob'))
print(d.get('Candy'))
print(d.get('David'))
print(d.get('Ellena'))
print(d.get('WGX'))
2020-11-28
已采纳回答 / 慕运维0295976
进入死循环了，True进入判断，0取余2得到0不等于1，所以sum_num=0，num=2，又进入判断，1取余2得到1，continue跳过下面，还判断True，还是1取余2得到1，一直循环，就没有结果
2020-11-27
def my_abs(x):
if not isinstance(x, int) and not isinstance(x, float):
print('param type error.')
return None
if x >= 0:
return x
else:
return -x
print(my_abs(-55))
if not isinstance(x, int) and not isinstance(x, float):
print('param type error.')
return None
if x >= 0:
return x
else:
return -x
print(my_abs(-55))
2020-11-27
def qs(x):
sum=0
num=1
while num<=x:
sum+=num
num+=1
return sum
print(qs(100))
def fact(n):
if n==1:
return 1
return n+fact(n-1)
print(fact(100))
sum=0
num=1
while num<=x:
sum+=num
num+=1
return sum
print(qs(100))
def fact(n):
if n==1:
return 1
return n+fact(n-1)
print(fact(100))
2020-11-27
def sub_sum(L):
sum_ji=0
sum_ou=0
num=1
for x in L:
if num % 2 != 0:
sum_ji+=x
num+=1
else:
sum_ou+=x
num+=1
return sum_ji,sum_ou
print(sub_sum([1,3,2,4,3,5]))
sum_ji=0
sum_ou=0
num=1
for x in L:
if num % 2 != 0:
sum_ji+=x
num+=1
else:
sum_ou+=x
num+=1
return sum_ji,sum_ou
print(sub_sum([1,3,2,4,3,5]))
2020-11-27
L = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
S = set([1, 3, 5, 7, 9, 11])
for a in L:
if a in S:
S.remove(a)
else:
S.add(a)
print(S)
S = set([1, 3, 5, 7, 9, 11])
for a in L:
if a in S:
S.remove(a)
else:
S.add(a)
print(S)
2020-11-26
d = {
'Alice': 45,
'Bob': 60,
'Candy': 75,
'David': 86,
'Ellena': 49
}
if 'Alice' in d:
result="Alice's old grade is "+str(d['Alice'])
print(result)
d['Alice']=60
print(d)
'Alice': 45,
'Bob': 60,
'Candy': 75,
'David': 86,
'Ellena': 49
}
if 'Alice' in d:
result="Alice's old grade is "+str(d['Alice'])
print(result)
d['Alice']=60
print(d)
2020-11-26
最新回答 / 慕运维0295976
python是一门解释型语言，就是我们的计算机不能直接识别我们编写的python语言，需要把python代码翻译成计算机它能识别的格式。解释器由一个编译器和一个虚拟机构成，编译器负责将源代码转换成字节码文件，而虚拟机负责执行字节码。
2020-11-26
T = (100, 69, 29, 100, 72, 99, 98, 100, 75, 100, 100, 42, 88, 100)
print(T.count(100))
print(T.count(100))
2020-11-26
L = ['Alice', 'Bob', 'Candy', 'David', 'Ellena']
N = [89,72,88,79,99]
dictA=dict(zip(L,N))
dictB=sorted(dictA, key=dictA.get, reverse = True)
print(dictB)
N = [89,72,88,79,99]
dictA=dict(zip(L,N))
dictB=sorted(dictA, key=dictA.get, reverse = True)
print(dictB)
2020-11-26