Day2:The commonly used sentence of string and number

# ************One:Number***********

a="123"

print(type(a),a)

b=int(a)

print(type(b),b)

# Transfer the string to number

# num='a'

#v=int(num,base=16)

#print(v)

# Transfer the string to number

#age=10

#v=age.bit_length()

#print(v)

# Count the binary bits 

  

# ************Two:String***********

#test='alex'

#v=test.capitalize()  #thefirstwordbecapital

test='aleX'

v=test.swapcase()

# Swith between capital and lower-case

# v=test.casefold() 

# test.casefold()..better

#v=test.islower() # judge

#v=test.lower()   # switch

#v=test.isupper() # judge

#v=test.upper()   # switch

# make the capital be a lower-case and converse

  

# v=test.center(20,'*')

# set length and put the content in the center

# v= test.ljust(20,'~')

# v= test.rjust(20,'~')

print(v)

#20 means the length

# '*'  filled the blank: one character and have or not...

# test='aleXeddecv'

# v=test.count('e')

# v=test.count('ex')

# v=test.count('e',4)

# v=test.count('e',4,6)

# Count the subsequence in the string and set the start place to the end place)

#encode

#decode

# test='aleXeddecv'

# v=test.endswith('v',4,5)

# v=test.startwith('v',4,5)

# print(v)

# test='zxver'

# v=test.find('xv',1,4)

# print(v)

# Find the character from the start to the end 

# Position ><=

# test='I am {name},age {a}'

# print(test)

# v=test.format(name='zxver',a=26)

#v=test.format_map({"name":'zxver',"a":26})

# Ignore: v=test.index()

# print(v)

# Formatting :use a value to replace the placeholder of a string

test='一'

# v=test.isalnum()

v1=test.isdecimal()

# just for decimal is true

v2=test.isdigit()

# Can be true while symbolic number

v3=test.isnumeric()

# Even Chinese number is true

#v=test.isalpha()

print(v1,v2,v3)

# Judges if the string just including number or word

# test='username email password chenzaizhi 875804005@qq.com vgvhh888986 liukeyu 586975258@qq.com ghhhv688569'

# v= test.expandtabs(25)

# print(v)

# Terminate the sentence with 25bytes and create a table

# a='_zxef '

# v= a.isidentifier()

# print(v)

# Judge is it qualified for identifier

# v=a.isprintable()

# if exist the characters that can't display : creat another line make table

# print(v)

# test='   '

# v= test.isspace()

# Judge if all the characters are blanks

# print(v)

# test='I Love liukeyu'

# v1=test.istitle()

# Judge if title

# print(v1)

# v2=test.title()

# Switch to the format of title

# print(v2)

# v3=v2.istitle()

# print(v3)

# ******* important

# test='1235468'

# t=' '

# v=t.join(test)

# v='_'.join(test)

# print(v)

# Appoint a separator to link every character

# test=' zverxd'

# v=test.strip()

# v=test.lstrip()

# v= test.rstrip('vrd')

#v=test.islower() # judge

#v=test.lower()   # switch# Strip the blanks; ;appointed character(notice the sequence)

# m='asdfg'

# n=str.maketrans('asdfg','12345')

# Make the rules

# v=m.translate(n)

# Replace

# print(v)

# test='xbhdhdbsj'

# v=test.partition('h')

# v=test.rpartition('h')

# v=test.split('h')

# v=test.rsplit('h')

# print(v)

# use partition or split depends if you want the separator

# test='xbhdhdbsj jjjhhjkk '

# v=test.splitlines(True)

# devide the sentence :True of False to remain the or not

# print(v)

  

# Three:

    # **********7 basic magic**********

# split strip join find upper lower replace

# test='sbxhdhwjbxbx'

# v=test.replace('bx','123',2)

# print(v)

# Four:

    # **********5 gray magic**********

# test='sdxff'

# v=test[0]

# index:get the certain character of the string

# v=test[0:4]

# slice ' >= <'

# print(v)

# v=len(test) 

# how many characters consists the string

# print(v)

# test='I love liukeyu'

# index = 0

# while index < len(test):

    # v = test[index]

    # print(v)

    # index += 1

# print('#########')

# for circulation********

# for ai in test:

    # print(ai)

# test=input('>>>>>>>')

# for ai in test:

    # print(ai)

# *****demand: print the index of the appointed character

test = input('>>>>>')

for ai in range(0,len(test)):

    print(ai,test[ai])

    

# v=range(0,100,5)

# creat continuous number or discontinuous number by setting steps

# for ai in v:

    # print(ai)

# Five:

    # *********deep gray magic********

# *****Once the string is created it can't be changed ,if need be changed it will creat a new string