01 basic data types

'''
'''
'''
Basic data types:

Digital Type:
    1, integer: int
        The person's age, identity ID number ...
        
    2, floating point type: float
        People's height and weight, payroll
'''
#int
age = int(18)
print(age)
print(type(age))

Age2 =. 19 # automatically recognizes the type 
Print (Age)
 Print (type (Age))

#float
will = 1:01
print(sal)
print(type(sal))

'''
String type:
    str
    
effect:
    Name, sex, nationality, address and other descriptive information
    
definition:
    In single quotes, double quotes, the three quotes a string of characters
'' ' 
# Single quotes 
str1 = ' Hello ' 
Print (str1)
 Print (type (str1))

# Double quotes 
str2 = " hello " 
Print (str2)
 Print (of the type (str2))

# Triple quotes: You can write multiple lines 
str3 = '' '
Anhui Province
Hefei
HEFEI
'''
print(str3)
print(type(str3))

'''
Master priority actions:
    1, according to an index value (forward + reverse take take): can only take
    2, a slice (care regardless of the end, step)
    3, the length len
    4, members and not in operation in
    5, remove the blank strip
    6, slicing split
    7, circulation
'' ' 
# By index values (Forward + Reverse take take): only take 
# forward taken 
str1 = ' ! Tank Hello ' 
Print (str1 [0])   # print H 
Print (str1 [. 9])   # Print k

# Reverse takes 
Print (str1 [-2]) # K

# Slice (care regardless of the end, step) 
str1 = ' Hello Tank! ' 
Print (str1 [0:. 4])     # printing hell

#步长
print(str1[0:11])   #hello tank!
print(str1[0:11:2]) #hlotn!

# Length len 
Print (len (str1))     # . 11

# Members in operations in and not 
Print ( ' H ' in str1)    # True 
Print ( ' H ' not  in str1)    # False

# Remove Blank Strip 
# spaces removes left and right sides of the string 
str1 = '   Hello Tank! ' 
Print (str1)
str1 ='  hello tank!  '
print(str1)
print(str1.strip())

# Remove the specified string 
str2 = ' ! Tank! ' 
Print (str2.strip ( ' ! ' ))


# Segmentation Split 
str1 = ' Hello Tank! ' 
# Be segmented according to the space within str1 
# segmentation exists out value [] list 
Print (str1.split ( '  ' ))   # [ 'Hello', 'Tank ! ']

# Cycle 
# of str1 string traversal, print each individual character 
for Line in str1:
     Print (Line)

'''
String type
    Need to know
'' ' 
# . 1, Strip, the lstrip, The rstrip 
str1 = '   Hello Yaya   ' 
print (str1)
 # remove the clear space 
print (str1.strip ())
 # remove the spaces left 
print (str1.lstrip ())
 # remove the right box 
print (str1.rstrip ())


# 2, Lower, Upper 
str1 = ' Hello YaYa ' 
# converted to lower 
Print (str1.lower ())
 # uppercase 
Print (str1.upper ())


# . 3, startsWith \ endsWith 
str1 = ' Hello Yaya ' 
# determines whether the beginning str1 Hello 
Print (str1.startswith ( ' Hello ' )) # True 
# determines whether the end of characters equal str1 Yaya 
Print (str1.endswith ( ' Yaya ' ) ) # True


# . 4, the format (output format) of the three kinds of play 
str1 = ' My name IS% S, S% Age My! ' % ( ' Tank ' , 18 is )
 Print (str1)

# Way: the sequence is formatted according to the position 
Print ( ' My name IS {}, {} Age My! ' .Format ( ' Tank ' , 18 is ))

# Second way: The index format 
Print ( ' ! My name IS {0}, Age {My}. 1 ' .format ( ' Tank ' , 18 is ))

# Three ways: by name formatting 
Print ( ' ! My name IS {name}, {My Age Age} ' .format (Age = 18 is, name = ' Tank ' ))


#5、split,lspilt
str1 = 'hello tank!'
print(str1.split(' '))
#print(str1.lsplit(' ')) #？？？？


# . 6, the Join string concatenation 
Print ( '  ' .join ([ ' Tank ' , 18 is]))     # error 
# to list each string splicing 
Print ( '  ' .join ([ ' Tank ' , ' 18 is ' ]))
 # the spaces, each of the string in the list is spliced 
Print ( '  ' .join ([ ' Tank ' , ' 18 is ' , ' from GZ ']))
 # The _, the list for each string of splicing 
Print ( '_'.join(['tank','18','from GZ']))


# . 7, Replace: string replacement 
str1 = ' My name IS Yaya, Age 18 is My ' 
Print (str1)
str2 = str1.replace('yaya','qy')
print(str2)


# . 8, isdigit: determining whether a string is the number 
Choice = INPUT ( ' select [0,1,2]: ' )
 # determines whether a user input selecting a digital 
Print (choice.isdigit ())


# . 9, index: Index output position 
str1 = ' Hello Yaya ' 
Print (str1.index ( ' O ' ))