字串印出 應用

#string index and scale
str='hello python'
print(str[0])#string index
print(str[1:3])#string scale
print(str[1::2])#third is step(default step is one)

#use string scale to create new string
print(str[0:2]+'s')

#replace string
str=str.replace('l', 'o')#use string replace l => o
print(str)

#find string
begin=str.find('python')#it will return where the string begin place
#if it can't find your word , it will return -1
print(str[begin:])
print('begin '+str[begin:])


#you can turn the string to list,to change to word
newstr=list(str)
print(newstr)
newstr[0]='g'#change index 0
newstr=''.join(newstr)#all element join in one string


#split the string
#ex1
word='how are you?'
print(word)
word_split=word.split(' ')#use your keyword to split
#ex2
word2='fine,thanks'
word2_split=word2.split(',')
print(word2_split)
print(word_split)
print(newstr)