var1 = ‘Hello World!‘ var2 = "Runoob"
#!/usr/bin/python3 var1 = ‘Hello World!‘ var2 = "Runoob" print ("var1[0]: ", var1[0]) print ("var2[1:5]: ", var2[1:5])
#!/usr/bin/python3 var1 = ‘Hello World!‘ print ("已更新字符串 : ", var1[:6] + ‘Runoob!‘)
#!/usr/bin/python3 a = "Hello" b = "Python" print("a + b 输出结果：", a + b) print("a * 2 输出结果：", a * 2) print("a[1] 输出结果：", a[1]) print("a[1:4] 输出结果：", a[1:4]) if( "H" in a) : print("H 在变量 a 中") else : print("H 不在变量 a 中") if( "M" not in a) : print("M 不在变量 a 中") else : print("M 在变量 a 中") print (r‘\n‘) print (R‘\n‘)
#!/usr/bin/python3 print ("我叫 %s 今年 %d 岁!" % (‘小明‘, 10))
#!/usr/bin/python3 para_str = """这是一个多行字符串的实例 多行字符串可以使用制表符 TAB ( \t )。 也可以使用换行符 [ \n ]。 """ print (para_str)
errHTML = ‘‘‘ <HTML><HEAD><TITLE> Friends CGI Demo</TITLE></HEAD> <BODY><H3>ERROR</H3> <B>%s</B><P> <FORM><INPUT TYPE=button VALUE=Back ONCLICK="window.history.back()"></FORM> </BODY></HTML> ‘‘‘ cursor.execute(‘‘‘ CREATE TABLE users ( login VARCHAR(8), uid INTEGER, prid INTEGER) ‘‘‘)
#!/usr/bin/python3 str = "this is string example from runoob....wow!!!" print ("str.capitalize() : ", str.capitalize())
#!/usr/bin/python3 str = "[www.runoob.com]" print ("str.center(40, ‘*‘) : ", str.center(40, ‘*‘))
str="www.runoob.com" sub=‘o‘ print ("str.count(‘o‘) : ", str.count(sub)) sub=‘run‘ print ("str.count(‘run‘, 0, 10) : ", str.count(sub,0,10))
str = "菜鸟教程"; str_utf8 = str.encode("UTF-8") str_gbk = str.encode("GBK") print(str) print("UTF-8 编码：", str_utf8) print("GBK 编码：", str_gbk) print("UTF-8 解码：", str_utf8.decode(‘UTF-8‘,‘strict‘)) print("GBK 解码：", str_gbk.decode(‘GBK‘,‘strict‘))
#!/usr/bin/python3 str1 = "Runoob example....wow!!!" str2 = "exam"; print (str1.find(str2)) print (str1.find(str2, 5)) print (str1.find(str2, 10))
str1 = "Runoob example....wow!!!" str2 = "exam"; print (str1.index(str2)) print (str1.index(str2, 5)) print (str1.index(str2, 10))
str = "runoob2016" # 字符串没有空格 print (str.isalnum()) str = "www.runoob.com" print (str.isalnum())
str = "runoob" print (str.isalpha()) str = "Runoob example....wow!!!" print (str.isalpha())
str = "123456"; print (str.isdigit()) str = "Runoob example....wow!!!" print (str.isdigit())
str = "RUNOOB example....wow!!!" print (str.islower()) str = "runoob example....wow!!!" print (str.islower())
str = "runoob2016" print (str.isnumeric()) str = "23443434" print (str.isnumeric())
str = " " print (str.isspace()) str = "Runoob example....wow!!!" print (str.isspace())
str = "THIS IS STRING EXAMPLE....WOW!!!" print (str.isupper()) str = "THIS is string example....wow!!!" print (str.isupper())
s1 = "-" s2 = "" seq = ("r", "u", "n", "o", "o", "b") # 字符串序列 print (s1.join( seq )) print (s2.join( seq ))
str = "Runoob example....wow!!!" print (str.ljust(50, ‘*‘))
str = "Runoob EXAMPLE....WOW!!!" print( str.lower() )
str = "Runoob example....wow!!!" print (str.ljust(50, ‘*‘))
str = "runoob" print ("最大字符: " + max(str))
str = "this is string example....wow!!!" print (str.split( )) # 以空格为分隔符 print (str.split(‘i‘,1)) # 以 i 为分隔符 print (str.split(‘w‘)) # 以 w 为分隔符
str = "this is string example....wow!!!" print (str.startswith( ‘this‘ )) # 字符串是否以 this 开头 print (str.startswith( ‘string‘, 8 )) # 从第八个字符开始的字符串是否以 string 开头 print (str.startswith( ‘this‘, 2, 4 )) # 从第2个字符开始到第四个字符结束的字符串是否以 this 开头
str = "*****this is **string** example....wow!!!*****" print (str.strip( ‘*‘ )) # 指定字符串 *
str = "123abcrunoob321" print (str.strip( ‘12‘ )) # 字符序列为 12
str = "this is string example from runoob....wow!!!"; print ("str.upper() : ", str.upper())
原文：https://www.cnblogs.com/tszr/p/10963146.html