【发布时间】:2011-11-27 13:53:04
【问题描述】:
我正在尝试在 Python 中对我的文本实现颜色循环...由于上下文发生了巨大变化,该问题已被编辑并作为另一个问题重新提交。请改用here。
这个问题更多的是关于我应该使用什么库 - termcolor、colorama、curses 和 ansi colour recipe,
到目前为止的代码:
#!/usr/bin/env python
'''
"arg" is a string or None
if "arg" is None : the terminal is reset to his default values.
if "arg" is a string it must contain "sep" separated values.
if args are found in globals "attrs" or "colors", or start with "@" \
they are interpreted as ANSI commands else they are output as text.
@* commands:
@x;y : go to xy
@ : go to 1;1
@@ : clear screen and go to 1;1
@[colour] : set foreground colour
^[colour] : set background colour
examples:
echo('@red') : set red as the foreground color
echo('@red ^blue') : red on blue
echo('@red @blink') : blinking red
echo() : restore terminal default values
echo('@reverse') : swap default colors
echo('^cyan @blue reverse') : blue on cyan <=> echo('blue cyan)
echo('@red @reverse') : a way to set up the background only
echo('@red @reverse @blink') : you can specify any combinaison of \
attributes in any order with or without colors
echo('@blink Python') : output a blinking 'Python'
echo('@@ hello') : clear the screen and print 'hello' at 1;1
colours:
{'blue': 4, 'grey': 0, 'yellow': 3, 'green': 2, 'cyan': 6, 'magenta': 5, 'white': 7, 'red': 1}
'''
'''
Set ANSI Terminal Color and Attributes.
'''
from sys import stdout
import random
import sys
import time
esc = '%s['%chr(27)
reset = '%s0m'%esc
format = '1;%dm'
fgoffset, bgoffset = 30, 40
for k, v in dict(
attrs = 'none bold faint italic underline blink fast reverse concealed',
colours = 'grey red green yellow blue magenta cyan white'
).items(): globals()[k]=dict((s,i) for i,s in enumerate(v.split()))
def echo(arg=None, sep=' ', end='\n', rndcase=True, txtspeed=0.03):
cmd, txt = [reset], []
if arg:
# split the line up into 'sep' seperated values - arglist
arglist=arg.split(sep)
# cycle through arglist - word seperated list
for word in arglist:
if word.startswith('@'):
### First check for a colour command next if deals with position ###
# go through each fg and bg colour
tmpword = word[1:]
if tmpword in colours:
cmd.append(format % (colours[tmpword]+fgoffset))
c=format % attrs[tmpword] if tmpword in attrs else None
if c and c not in cmd:
cmd.append(c)
stdout.write(esc.join(cmd))
continue
# positioning (starts with @)
word=word[1:]
if word=='@':
cmd.append('2J')
cmd.append('H')
stdout.write(esc.join(cmd))
continue
else:
cmd.append('%sH'%word)
stdout.write(esc.join(cmd))
continue
if word.startswith('^'):
### First check for a colour command next if deals with position ###
# go through each fg and bg colour
tmpword = word[1:]
if tmpword in colours:
cmd.append(format % (colours[tmpword]+bgoffset))
c=format % attrs[tmpword] if tmpword in attrs else None
if c and c not in cmd:
cmd.append(c)
stdout.write(esc.join(cmd))
continue
else:
for x in word:
if rndcase:
# thankyou mark!
if random.randint(0,1):
x = x.upper()
else:
x = x.lower()
stdout.write(x)
stdout.flush()
time.sleep(txtspeed)
stdout.write(' ')
time.sleep(txtspeed)
if txt and end: txt[-1]+=end
stdout.write(esc.join(cmd)+sep.join(txt))
if __name__ == '__main__':
echo('@@') # clear screen
#echo('@reverse') # attrs are ahem not working
print 'default colors at 1;1 on a cleared screen'
echo('@red hello this is red')
echo('@blue this is blue @red i can ^blue change @yellow blah @cyan the colours in ^default the text string')
print
echo()
echo('default')
echo('@cyan ^blue cyan blue')
# echo('@cyan ^blue @reverse cyan blue reverse')
# echo('@blue ^cyan blue cyan')
#echo('@red @reverse red reverse')
# echo('yellow red yellow on red 1')
# echo('yellow,red,yellow on red 2', sep=',')
# print 'yellow on red 3'
# for bg in colours:
# echo(bg.title().center(8), sep='.', end='')
# for fg in colours:
# att=[fg, bg]
# if fg==bg: att.append('blink')
# att.append(fg.center(8))
# echo(','.join(att), sep=',', end='')
#for att in attrs:
# echo('%s,%s' % (att, att.title().center(10)), sep=',', end='')
# print
from time import sleep, strftime, gmtime
colist='@grey @blue @cyan @white @cyan @blue'.split()
while True:
try:
for c in colist:
sleep(.1)
echo('%s @28;33 hit ctrl-c to quit' % c,txtspeed=0)
#echo('@yellow @6;66 %s' % strftime('%H:%M:%S', gmtime()))
except KeyboardInterrupt:
break
except:
raise
echo('@10;1')
print
【问题讨论】:
-
一个快速观察是 \e 应该是 \033 就像你的第一个 BOLD 定义一样。
-
(a) 如果你去实现你自己的,你就是在重复别人已经完成的工作,并确保他们已经正确地完成了。 (b) 当你可以使用他们已经成功实施的东西时,为什么你甚至想再去做这项工作? (当然,我自己也做过,但这无关紧要!) (c) 如果您关心 Windows,甚至不要尝试自己编写;使用颜色。
-
啊不,我根本不关心 Windows。猜猜我问的主要原因是 - 我是否能够使用一些库并且在一次打印一个字符的东西中仍然可以轻松地工作。如果我必须实现自己的代码来做到这一点,那么使用外部资源就没有多大意义了。加上这意味着安装额外的代码来运行。是的 :) 它也是为了练习,现在只用了一周多的时间在做 python。
-
什么你只是去标记重复而不阅读帖子? :) 我实际上知道那个页面,但这不是我的问题,问题源于一次打印一个字符。好吧,如果没有人建议我将我笨重的 bash 例程复制到 python 中然后回发……也许有人也想要这个。