[python]Ascii ETX STX

處理字串偶然間遇到特殊字元ETX,STX,查了才知道原來是控制碼，一般控制碼是 ASCII 前 32 碼。在python官網有詳細的解釋。

程式:

# -*- coding: utf-8 -*-
#測試EXT STX
stx = '\x02'
etx = '\x03'

s='疵除外 )。",'

ustx=stx.encode('UTF-8')
uetx=etx.encode('UTF-8')

print s.find(etx)
print s.find(uetx)
print s.find(stx)
print s.find(ustx)

輸出:
9
9
-1
-1

Name	Meaning
NUL
SOH	Start of heading, console interrupt
STX	Start of text
ETX	End of text
EOT	End of transmission
ENQ	Enquiry, goes with ACK flow control
ACK	Acknowledgement
BEL	Bell
BS	Backspace
TAB	Tab
HT	Alias for TAB: “Horizontal tab”
LF	Line feed
NL	Alias for LF: “New line”
VT	Vertical tab
FF	Form feed
CR	Carriage return
SO	Shift-out, begin alternate character set
SI	Shift-in, resume default character set
DLE	Data-link escape
DC1	XON, for flow control
DC2	Device control 2, block-mode flow control
DC3	XOFF, for flow control
DC4	Device control 4
NAK	Negative acknowledgement
SYN	Synchronous idle
ETB	End transmission block
CAN	Cancel
EM	End of medium
SUB	Substitute
ESC	Escape
FS	File separator
GS	Group separator
RS	Record separator, block-mode terminator
US	Unit separator
SP	Space
DEL	Delete

參考:

https://docs.python.org/2/library/curses.ascii.html