Python编程从入门到实践-第2章-字符串

Posted 2021-01-15 hermione74

一、字符串：一系列字符，python中用一号括起来的即为字符串，可单可双

"This is a string."
‘This is also a string.‘

 

#引号灵活性的作用：可在字符串中包含引号和撇号

‘I told my friend,"python is my favorite language!"‘
"the language ‘Python‘ is named after Monty Python,not the snake."

 

#1.使用方法修改字符串大的小写

name = "ada lovelace"
print(name.title())

name = "ada lovelace"
print(name.upper())

name = "ada lovelace"
print(name.lower())

 

#2.合并（拼接）字符串

first_name = ‘ada‘
last_name = ‘lovelace‘
full_name = first_name + ‘ ‘ +last_name

print(full_name)

print ("Hello," + full_name.title() + "!")

message = "Hello," + full_name.title() + "!"
print (message)

 

#3.制表符或换行符添加空白
#制表符:

print (‘python‘)
print (‘	python‘)

 

#换行符：

print (‘python‘)
print (‘
python‘)
print (‘Languages:
Python
C
JavaScript‘)

 

 

 

#同时使用制表符和换行符
print (‘Languages: Python C JavaScript‘)

#4.删除空白:rstrip,lstrip,strip
#rstrip:删除右侧空白

#lstrip:删除左侧空白
#strip:删除两侧空白

favorite_language = ‘python ‘
print (favorite_language)

favorite_language = ‘python ‘
print (favorite_language.rstrip())


favorite_language = ‘python ‘
favorite_language = favorite_language.rstrip()
print (favorite_language)

 

favorite_language = ‘ python ‘
print (favorite_language.rstrip())
print (favorite_language.lstrip())
print (favorite_language.strip())