课程 \
Python3 入门教程(新版)
3-6 Python中raw字符串与多行字符串
# Enter a code
print(r'''"To be,or not to be":that is the queston.
Whether it's nobler in the mind to suffer.''')
print(r'\(~_~)/')
print('\\(~_~)/')
2022-08-06
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3-7 Python的字符串format
templet='life is short,{2} {1} {0}'
result=templet.format('you','need','python')
print(result)
templet='life is short,{y} {n} {p}'
y="you"
n='need'
p='python'
result=templet.format(y=y,n=n,p=p)
print(result)
2022-07-24
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3-9 Python的字符串切片
# Enter a code
s='jkl'
print(s[1])
U='AABCDEFGHHIJ'
print(U[1:9])
2022-07-24
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4-2 Python之if-else语句
# Enter a code
if age>=18:
print('adult')
else:
print('teenager')
2022-07-24
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4-4 Python之for循环
# Enter a code
L = [75, 92, 59, 68, 99]
num=0.0
for ch in L:
num=num+ch
sum=num/5
print(sum)
2022-07-25
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4-5 Python之while循环
# Enter a code
sum=1
n=0
while n<=9:
n=n+1
sum=sum*n
print(sum)
2022-07-24
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4-6 Python之break跳出循环
# Enter a code
num=0
sum=0
while True:
if num>998:
break
num=num+2
sum=sum+num
print(sum)
num=0
sum=0
while True:
if num>1000:
break
if num%2==0:
sum=sum+num
num=num+1
print(sum)
2022-07-30
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4-7 Python之continue继续循环
num=0
sum=0
while num<=1000:
num=num+1
if num%2==1:
continue
sum=sum+num
print(sum)
2022-07-25
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4-8 Python之嵌套循环
# Enter a code
s1='ABC'
s2='123'
s3='xyz'
for a in s1:
for b in s2:
for c in s3:
print(a+b+c)
2022-07-25
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5-1 什么是容器、什么是list
# Enter a code
L=['Alice','chinese',92,'math',75,'English',99]
print(L)
2022-07-25
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5-2 Python按顺序访问list
# Enter a code
L=['Alice',66,'Bob',True,'False',100]
num=0
for item in L:
num=num+1
if num%2==1:
continue
print(item)
2022-07-30
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