Init style output with python?

[Maxim Veksler]

Hi list,

I'm working on writing sanity check script, and for aesthetic reasons
I would like the output be in the formatted like the gentoo init
script output, that is:
"""
Check for something .................................. [OK]
Check for something else ..........................[FAIL]
"""

Is there are frame work or something in python that would allow me to
do this (quickly) ?
If not, ideas how I should I be getting this boring task of:
1. get screen width
2. get output string length
3. get out status length
4. calculate space
5. print string, print space, print status, print newline

what happens if user changes textual terminal "resolution" ?

p.s.
I would also like to "OK" and "FAIL" output to be colored. I haven't
found anything for python to would allow to to output to ansi (linux,
rxvt, xterm). Here's a quick class I've written (in the hope it proves
to be useful to the next guy).

"""
#!/usr/bin/env python
""" This stuff is under GPL, as always"""

class ColorTerm:
def __init__(self, Mono = False):
pass

def __get_tput_color_value__(colorcode):
from commands import getoutput
return getoutput('tput setaf ' + colorcode)

BLACK_FG = __get_tput_color_value__('0')
RED_FG = __get_tput_color_value__('1')
GREEN_FG = __get_tput_color_value__('2')
YELLOW_FG = __get_tput_color_value__('3')
BLUE_FG = __get_tput_color_value__('4')
MAGENTA_FG = __get_tput_color_value__('5')
CYAN_FG = __get_tput_color_value__('6')
WHITE_FG = __get_tput_color_value__('7')

def black(self, msg):
return self.BLACK_FG + msg + self.BLACK_FG

def red(self, msg):
return self.RED_FG + msg + self.BLACK_FG

def green(self, msg):
return self.GREEN_FG + msg + self.BLACK_FG

def yellow(self, msg):
return self.YELLOW_FG + msg + self.BLACK_FG

def blue(self, msg):
return self.BLUE_FG + msg + self.BLACK_FG

def magenta(self, msg):
return self.MAGENTA_FG + msg + self.BLACK_FG

def cyan(self, msg):
return self.CYAN_FG + msg + self.BLACK_FG

def white(self, msg):
return self.WHITE_FG + msg + self.BLACK_FG


cc = ColorTerm()
print cc.red('Cool!') + cc.yellow('?'), cc.green('Sure is!!!')
print "Now setting your terminal text color to blue" + cc.BLUE_FG
print "well don't be blue about this, here let me set it back for you"
print cc.BLACK_FG + "see, nothing to worry about"
"""

 

[John Machin]

Hi list,

I'm working on writing sanity check script, and for aesthetic reasons
I would like the output be in the formatted like the gentoo init
script output, that is:
"""
Check for something .................................. [OK]
Check for something else ..........................[FAIL]
"""

Is there are frame work or something in python that would allow me to
do this (quickly) ?
If not, ideas how I should I be getting this boring task of:
1. get screen width

Is it not (a) safe (b) sensible to assume a minimum width (say 79) and
avoid the whole question of determining the terminal width?

2. get output string length
3. get out status length
4. calculate space
5. print string, print space, print status, print newline

Surely you don't need assistance with steps 2 - 5 ...

what happens if user changes textual terminal "resolution" ?

Something rather unaesthetic, I imagine.

 

[Tina I]

Is there are frame work or something in python that would allow me to
do this (quickly) ?
If not, ideas how I should I be getting this boring task of:
1. get screen width

You can look into the 'curses' module and do something like:

screen = curses.initscreen()
maxheight, maxwith = screen.getmaxyx()

In my experience curses can be a bit tricky to work with but the online
tutorials have some nice examples that help you avoid some of the
pitfalls (like messing up your terminal)

Tina

 

[Maxim Veksler]

You can look into the 'curses' module and do something like:

screen = curses.initscreen()
maxheight, maxwith = screen.getmaxyx()

In my experience curses can be a bit tricky to work with but the online
tutorials have some nice examples that help you avoid some of the
pitfalls (like messing up your terminal)

Tina

Fine! Thank you.

curses is very helpful, I'm attaching the code.
I see it has support for colors as well, but I haven't found any
tutorial that would explain how to use them.

Please note that this is just a draft, I'm not catching any
KeyboardInterrupt nor nothing.

"""#!/usr/bin/env python

class ColorTerm:
def __init__(self, Mono = False):
pass

def __get_tput_color_value__(colorcode):
from commands import getoutput
return getoutput('tput setaf ' + colorcode)

BLACK_FG = __get_tput_color_value__('0')
RED_FG = __get_tput_color_value__('1')
GREEN_FG = __get_tput_color_value__('2')
YELLOW_FG = __get_tput_color_value__('3')
BLUE_FG = __get_tput_color_value__('4')
MAGENTA_FG = __get_tput_color_value__('5')
CYAN_FG = __get_tput_color_value__('6')
WHITE_FG = __get_tput_color_value__('7')

def black(self, msg):
return self.BLACK_FG + msg + self.BLACK_FG

def red(self, msg):
return self.RED_FG + msg + self.BLACK_FG

def green(self, msg):
return self.GREEN_FG + msg + self.BLACK_FG

def yellow(self, msg):
return self.YELLOW_FG + msg + self.BLACK_FG

def blue(self, msg):
return self.BLUE_FG + msg + self.BLACK_FG

def magenta(self, msg):
return self.MAGENTA_FG + msg + self.BLACK_FG

def cyan(self, msg):
return self.CYAN_FG + msg + self.BLACK_FG

def white(self, msg):
return self.WHITE_FG + msg + self.BLACK_FG

class StatusWriter(ColorTerm):
import curses

def __init__(self, report_type = None):
pass

def initstyle_message(self, msg, status = True):
screen = self.curses.initscr(); self.curses.endwin()
if status:
status_msg = '[' + self.green('OK') + ']'
else:
status_msg = '[' + self.red('FAIL') + ']'

spaces_count = ( screen.getmaxyx()[1] - (len(msg)+len(status_msg)) )
return msg + ' '*spaces_count + status_msg

cc = StatusWriter()
while 1:
print cc.initstyle_message('The end is at hand')
print cc.initstyle_message('Lets party', False)
print cc.initstyle_message('Why like this?', True)
"""