Chr python with the () value into a string, numeric character conversion ord (s) function

1.1 python string definitions

#!/usr/bin/python
# -*- coding: utf8 -*-

# Definition of a string
s1 = 'this is long String that spans two lines'

# Indicates the following line is a continuation of the previous line
s2 = 'this is long String\
that spans two lines'

# Is output as a string
s3 = """this is long String
that spans two lines
"""
# Newline character string output
s4 = 'this is long String\n\
that spans two lines'

print "s1=",s1
print "s2=",s2
print "s3=",s3
print "s4=",s4

 

Output:

  

Conversion between the character and the character value 1.2 python

 A: & characters into numeric value into a string: ord function which can be converted to a string is an integer ranging from [0,65535]

#!/usr/bin/python
# -*- coding: utf8 -*-
# Characters into value
s = 'a'
print ord ( s )
# Value into a string
b = 97
print chr(b)

B: Parameters args chr () function in the [0,256], meaning that only the [0,256] into a string of digital

C: The value is a Unicode code into a Unicode string

#!/usr/bin/python
# -*- coding: utf8 -*-

# The values ​​were converted to unicode string code
print repr(unichr( 8224))
# Unicode string into the code values
print repr (words ( u '\ u2020' ))

 

D: chr () function and the difference between str function:

           1. chr () function is as a parameter to a small integer, and returns the ASCII character string corresponds to a single character

           2. str () function is to any integer as a parameter and returns the integer a text string