python中字符串小结

1.字符串的定义

if __name__ == "__main__":
var1 = 'this world is beautiful!!'
var2 = "this world is beautiful!!"
var3 = 'this "world" is beautiful!!'
var4 = "this 'world' is beautiful!!"
var5 = '''this
world
is
beautiful!!'''
var6 = """this
world
is
beautiful!!"""
var7 = '''this
"world"
is
beautiful!!'''
var8 = """this
'world'
is
beautiful!!"""
var9 = 'this \"world\" is beautiful!!'
var10 = "this \'world\' is beautiful!!"
var11 = "this \"world\" is beautiful!!"
var12 = 'this \'world\' is beautiful!!'
var13 = "this world " "is beautiful!!"
var14 = 'this world ' 'is beautiful!!'
var15 = ("this world "
"is beautiful!!")
var16 = 'this world '\
'is beautiful!!'

print "var1 : " + var1
print '*'*40
print "var2 : " + var2
print '*'*40
print "var3 : " + var3
print '*'*40
print "var4 : " + var4
print '*'*40
print "var5 : " + var5
print '*'*40
print "var6 : " + var6
print '*'*40
print "var7 : " + var7
print '*'*40
print "var8 : " + var8
print '*'*40
print "var9 : " + var9
print '*'*40
print "var10 : " + var10
print '*'*40
print "var11 : " + var11
print '*'*40
print "var12 : " + var12
print '*'*40
print "var13 : " + var13
print '*'*40
print "var14 : " + var14
print '*'*40
print "var15 : " + var15
print '*'*40
print "var16 : " + var16
print '*'*40

输出内容为：

var1 : this world is beautiful!!
****************************************
var2 : this world is beautiful!!
****************************************
var3 : this "world" is beautiful!!
****************************************
var4 : this 'world' is beautiful!!
****************************************
var5 : this
world
is
beautiful!!
****************************************
var6 : this
world
is
beautiful!!
****************************************
var7 : this
"world"
is
beautiful!!
****************************************
var8 : this
'world'
is
beautiful!!
****************************************
var9 : this "world" is beautiful!!
****************************************
var10 : this 'world' is beautiful!!
****************************************
var11 : this "world" is beautiful!!
****************************************
var12 : this 'world' is beautiful!!
****************************************
var13 : this world is beautiful!!
****************************************
var14 : this world is beautiful!!
****************************************
var15 : this world is beautiful!!
****************************************
var16 : this world is beautiful!!
****************************************

备注：

（1）单双引号都可以用来定义字符串

（2）当字符串串中包括单引号时，则使用双引号来定义。反之亦成立。当然这种情况可以使用转义字符

（3）对于多行的字符串，可以使用三重单引号或者三种双引号来定义。