1.%s,%d
举例1：name='egon'
age=20
print("my name is %s my age is %s" %(name,age))#%s既能接受字符串，也能接受数字
print(‘my name is %s my age is %d’ %(name,age))#%d只能接受数字
举例2：用户信息的显示
1 while True:
2 name=input("name:")
3 age=input("age:")
4 sex=input("sex:")
5 height=input("height:")
6 msg='''
7 ------------%s info-----------
8 name:%s
9 age:%s
10 sex:%s
11 height:%s
12 ------------------------------
13 '''%(name,name,age,sex,heigth)
14 print(msg)
运行结果如下：
2.字符串方法
|
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# name='egon' #name=str('egon')
# print(type(name))
#优先掌握
#1.移除空白strip
# msg=' hello '
# print(msg)
# print(msg.strip())
# 移除‘*’
# msg='***hello*********'
# msg=msg.strip('*')
# print(msg)
#移除左边的
# print(msg.lstrip('*'))
#移除右边的
# print(msg.rstrip('*'))
#用处
while
True
:
name
=
input
(
'user: '
).strip()
password
=
input
(
'password: '
).strip()
if
name
=
=
'egon'
and
password
=
=
'123'
:
print
(
'login successfull'
)
#切分split
# info='root:x:0:0::/root:/bin/bash'
# print(info[0]+info[1]+info[2]+info[3])
# user_l=info.split(':')
# print(user_l[0])
# msg='hello world egon say hahah'
# print(msg.split()) #默认以空格作为分隔符
#cmd='download|xhp.mov|3000'
# cmd_l=cmd.split('|')
# print(cmd_l[1])
# print(cmd_l[0])
# print(cmd.split('|',1))
#用处
while
True
:
cmd
=
input
(
'>>: '
).strip()
if
len
(cmd)
=
=
0
:
continue
cmd_l
=
cmd.split()
print
(
'命令是:%s 命令的参数是:%s'
%
(cmd_l[
0
],cmd_l[
1
]))
#长度len
# print(len('hell 123'))
#索引
# 切片:切出子字符串
# msg='hello world'
# print(msg[1:3]) #1 2
# print(msg[1:4]) #1 2 3
# 掌握部分
oldboy_age
=
84
while
True
:
age
=
input
(
'>>: '
).strip()
if
len
(age)
=
=
0
:
continue
if
age.isdigit():
age
=
int
(age)
else
:
print
(
'must be int'
)
#startswith,endswith
# name='alex_SB'
# print(name.endswith('SB'))
# print(name.startswith('alex'))
#replace
# name='alex say :i have one tesla,my name is alex'
# print(name.replace('alex','SB',1))
# print('my name is %s my age is %s my sex is %s' %('egon',18,'male'))
# print('my name is {} my age is {} my sex is {}'.format('egon',18,'male'))
# print('my name is {0} my age is {1} my sex is {0}:
{
2
}
'.format('
egon
',18,'
male'))
# print('my name is {name} my age is {age} my sex is {sex}'.format(
# sex='male',
# age=18,
# name='egon'))
# name='goee say hello'
# # print(name.find('S',1,3)) #顾头不顾尾,找不到则返回-1不会报错,找到了则显示索引
# # print(name.index('S')) #同上,但是找不到会报错
#
# print(name.count('S',1,5)) #顾头不顾尾,如果不指定范围则查找所有
#join
# info='root:x:0:0::/root:/bin/bash'
# print(info.split(':'))
# l=['root', 'x', '0', '0', '', '/root', '/bin/bash']
# print(':'.join(l))
#lower,upper
# name='eGon'
# print(name.lower())
# print(name.upper())
#了解部分
#expandtabs
# name='egon\thello'
# print(name)
# print(name.expandtabs(1))
#center,ljust,rjust,zfill
# name='egon'
# # print(name.center(30,'-'))
# print(name.ljust(30,'*'))
# print(name.rjust(30,'*'))
# print(name.zfill(50)) #用0填充
#captalize,swapcase,title
# name='eGon'
# print(name.capitalize()) #首字母大写,其余部分小写
# print(name.swapcase()) #大小写翻转
# msg='egon say hi'
# print(msg.title()) #每个单词的首字母大写
#在python3中
num0
=
'4'
num1
=
b
'4'
#bytes
num2
=
u
'4'
#unicode,python3中无需加u就是unicode
num3
=
'四'
#中文数字
num4
=
'Ⅳ'
#罗马数字
#isdigt:str,bytes,unicode
# print(num0.isdigit())
# print(num1.isdigit())
# print(num2.isdigit())
# print(num3.isdigit())
# print(num4.isdigit())
#isdecimal:str,unicode
# num0='4'
# num1=b'4' #bytes
# num2=u'4' #unicode,python3中无需加u就是unicode
# num3='四' #中文数字
# num4='Ⅳ' #罗马数字
# print(num0.isdecimal())
# # print(num1.)
# print(num2.isdecimal())
# print(num3.isdecimal())
# print(num4.isdecimal())
#isnumeric:str,unicode,中文，罗马
# num0='4'
# num1=b'4' #bytes
# num2=u'4' #unicode,python3中无需加u就是unicode
# num3='四' #中文数字
# num4='Ⅳ' #罗马数字
#
# print(num0.isnumeric())
# # print(num1)
# print(num2.isnumeric())
# print(num3.isnumeric())
# print(num4.isnumeric())
#is其他
# name='egon123'
# print(name.isalnum()) #字符串由字母和数字组成
# name='asdfasdfa sdf'
# print(name.isalpha()) #字符串只由字母组成
#
# name='asdfor123'
# print(name.isidentifier())
name
=
'egGon'
print
(name.islower())
# print(name.isupper())
# print(name.isspace())
name
=
'Egon say'
print
(name.istitle())
|
1.%s,%d
举例1：name='egon'
age=20
print("my name is %s my age is %s" %(name,age))#%s既能接受字符串，也能接受数字
print(‘my name is %s my age is %d’ %(name,age))#%d只能接受数字
举例2：用户信息的显示
1 while True:
2 name=input("name:")
3 age=input("age:")
4 sex=input("sex:")
5 height=input("height:")
6 msg='''
7 ------------%s info-----------
8 name:%s
9 age:%s
10 sex:%s
11 height:%s
12 ------------------------------
13 '''%(name,name,age,sex,heigth)
14 print(msg)
运行结果如下：
2.字符串方法
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
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46
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48
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50
51
52
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112
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147
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159
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167
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172
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176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
# name='egon' #name=str('egon')
# print(type(name))
#优先掌握
#1.移除空白strip
# msg=' hello '
# print(msg)
# print(msg.strip())
# 移除‘*’
# msg='***hello*********'
# msg=msg.strip('*')
# print(msg)
#移除左边的
# print(msg.lstrip('*'))
#移除右边的
# print(msg.rstrip('*'))
#用处
while
True
:
name
=
input
(
'user: '
).strip()
password
=
input
(
'password: '
).strip()
if
name
=
=
'egon'
and
password
=
=
'123'
:
print
(
'login successfull'
)
#切分split
# info='root:x:0:0::/root:/bin/bash'
# print(info[0]+info[1]+info[2]+info[3])
# user_l=info.split(':')
# print(user_l[0])
# msg='hello world egon say hahah'
# print(msg.split()) #默认以空格作为分隔符
#cmd='download|xhp.mov|3000'
# cmd_l=cmd.split('|')
# print(cmd_l[1])
# print(cmd_l[0])
# print(cmd.split('|',1))
#用处
while
True
:
cmd
=
input
(
'>>: '
).strip()
if
len
(cmd)
=
=
0
:
continue
cmd_l
=
cmd.split()
print
(
'命令是:%s 命令的参数是:%s'
%
(cmd_l[
0
],cmd_l[
1
]))
#长度len
# print(len('hell 123'))
#索引
# 切片:切出子字符串
# msg='hello world'
# print(msg[1:3]) #1 2
# print(msg[1:4]) #1 2 3
# 掌握部分
oldboy_age
=
84
while
True
:
age
=
input
(
'>>: '
).strip()
if
len
(age)
=
=
0
:
continue
if
age.isdigit():
age
=
int
(age)
else
:
print
(
'must be int'
)
#startswith,endswith
# name='alex_SB'
# print(name.endswith('SB'))
# print(name.startswith('alex'))
#replace
# name='alex say :i have one tesla,my name is alex'
# print(name.replace('alex','SB',1))
# print('my name is %s my age is %s my sex is %s' %('egon',18,'male'))
# print('my name is {} my age is {} my sex is {}'.format('egon',18,'male'))
# print('my name is {0} my age is {1} my sex is {0}:
{
2
}
'.format('
egon
',18,'
male'))
# print('my name is {name} my age is {age} my sex is {sex}'.format(
# sex='male',
# age=18,
# name='egon'))
# name='goee say hello'
# # print(name.find('S',1,3)) #顾头不顾尾,找不到则返回-1不会报错,找到了则显示索引
# # print(name.index('S')) #同上,但是找不到会报错
#
# print(name.count('S',1,5)) #顾头不顾尾,如果不指定范围则查找所有
#join
# info='root:x:0:0::/root:/bin/bash'
# print(info.split(':'))
# l=['root', 'x', '0', '0', '', '/root', '/bin/bash']
# print(':'.join(l))
#lower,upper
# name='eGon'
# print(name.lower())
# print(name.upper())
#了解部分
#expandtabs
# name='egon\thello'
# print(name)
# print(name.expandtabs(1))
#center,ljust,rjust,zfill
# name='egon'
# # print(name.center(30,'-'))
# print(name.ljust(30,'*'))
# print(name.rjust(30,'*'))
# print(name.zfill(50)) #用0填充
#captalize,swapcase,title
# name='eGon'
# print(name.capitalize()) #首字母大写,其余部分小写
# print(name.swapcase()) #大小写翻转
# msg='egon say hi'
# print(msg.title()) #每个单词的首字母大写
#在python3中
num0
=
'4'
num1
=
b
'4'
#bytes
num2
=
u
'4'
#unicode,python3中无需加u就是unicode
num3
=
'四'
#中文数字
num4
=
'Ⅳ'
#罗马数字
#isdigt:str,bytes,unicode
# print(num0.isdigit())
# print(num1.isdigit())
# print(num2.isdigit())
# print(num3.isdigit())
# print(num4.isdigit())
#isdecimal:str,unicode
# num0='4'
# num1=b'4' #bytes
# num2=u'4' #unicode,python3中无需加u就是unicode
# num3='四' #中文数字
# num4='Ⅳ' #罗马数字
# print(num0.isdecimal())
# # print(num1.)
# print(num2.isdecimal())
# print(num3.isdecimal())
# print(num4.isdecimal())
#isnumeric:str,unicode,中文，罗马
# num0='4'
# num1=b'4' #bytes
# num2=u'4' #unicode,python3中无需加u就是unicode
# num3='四' #中文数字
# num4='Ⅳ' #罗马数字
#
# print(num0.isnumeric())
# # print(num1)
# print(num2.isnumeric())
# print(num3.isnumeric())
# print(num4.isnumeric())
#is其他
# name='egon123'
# print(name.isalnum()) #字符串由字母和数字组成
# name='asdfasdfa sdf'
# print(name.isalpha()) #字符串只由字母组成
#
# name='asdfor123'
# print(name.isidentifier())
name
=
'egGon'
print
(name.islower())
# print(name.isupper())
# print(name.isspace())
name
=
'Egon say'
print
(name.istitle())
|