a='python'
print('hello,',a or 'world')
b=''
print('hello,',b or 'world')
# b为False,b or 'world'输出‘world’
print('hello,',a or 'world')
b=''
print('hello,',b or 'world')
# b为False,b or 'world'输出‘world’
2021-04-13
longs=3.14
wide=1.57
area=longs*wide
result=round(area,2)
print('长方形面积是：%s',result)
wide=1.57
area=longs*wide
result=round(area,2)
print('长方形面积是：%s',result)
2021-04-13
# Enter a code
a='h'
a1='e'
a2='ll'
a3='o'
b='Wo'
b1='rld'
# print(a+a1+a2+a3,b+b1)
c=(a+a1+a2+a3,b+b1)
print(c)
a='h'
a1='e'
a2='ll'
a3='o'
b='Wo'
b1='rld'
# print(a+a1+a2+a3,b+b1)
c=(a+a1+a2+a3,b+b1)
print(c)
2021-04-13
num=list()
x=1
while x<101:
num.append(x*x)
x=x+1
print(x)
print(sum(num))
x=1
while x<101:
num.append(x*x)
x=x+1
print(x)
print(sum(num))
s1 = set([1, 2, 3, 4, 5])
s2 = set([1, 2, 3, 4, 5, 6, 7, 8, 9])
if s1.isdisjoint(s2)==False:
for x in s1:
if x in s2:
print(x)
s2 = set([1, 2, 3, 4, 5, 6, 7, 8, 9])
if s1.isdisjoint(s2)==False:
for x in s1:
if x in s2:
print(x)
2021-04-12
num = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
number = set([1, 3, 5, 7, 9, 11])
for t1 in num:
if t1 in number:
number.remove(t1)
else:
number.add(t1)
print(number)
number = set([1, 3, 5, 7, 9, 11])
for t1 in num:
if t1 in number:
number.remove(t1)
else:
number.add(t1)
print(number)
2021-04-12
# coding=utf-8
names=['Jenny', 'Ellena', 'Alice', 'Candy', 'David', 'Hally', 'Bob', 'Isen', 'Karl']
s_1=set()
s_2=set()
for name in names:
s_1.add(name)
s_2.update(names)
print(s_1)
print(s_2)
names=['Jenny', 'Ellena', 'Alice', 'Candy', 'David', 'Hally', 'Bob', 'Isen', 'Karl']
s_1=set()
s_2=set()
for name in names:
s_1.add(name)
s_2.update(names)
print(s_1)
print(s_2)
2021-04-12
d = {'Alice': [50, 61, 66], 'Bob': [80, 61, 66], 'Candy': [88, 75, 90]}
num=0
for name in d:
num=num+1
print(num)
num=0
for name in d:
num=num+1
print(num)
2021-04-11
d = {'Alice': [50, 61, 66], 'Bob': [80, 61, 66], 'Candy': [88, 75, 90]}
for name in d:
print(name)
for score in d[name]:
print(score)
for name in d:
print(name)
for score in d[name]:
print(score)
2021-04-11
d = {
'Alice': 45,
'Bob': 60,
'Candy': 75,
'David': 86,
'Ellena': 49
}
print(d.keys())
'Alice': 45,
'Bob': 60,
'Candy': 75,
'David': 86,
'Ellena': 49
}
print(d.keys())
2021-04-11