removing the ' from list elements
doyen at mediaone.net
doyen at mediaone.net
Wed Mar 8 04:12:13 CET 2000
I think this is a newbie oops situation, but I have read the tutorial,
library reference and laguage reference without any Eureka!'s. Maybe
it's too many years of basic.
I've written a program that reads ftp LIST output, filters it and puts
in in a list for sorting. I'm taking each line from the file listing I
retrieve, parsing it into a list of year, month, day, time, size, name
and source by using string.split. I then use sting.join on each 'mini
list' into a formated line and place it in a 'master' list to use
list.sort() and list.reverse for sorting by date last modified.
When I retirieve (or examine) the elements within the list, I use
string.split again to parse them, then use strimg,replace('[', '') for
compariisons, or for output.
I';ve got a routine that I use for removing them,. but I'd rather not
add them in the first place. A single space delimiter would work.
Is there a format that I can create my 'columns' without using the list
format ["", "", ""] with these characters that I have to keep removing?
btw: I'm not complaining, I'm loving Python, it runs fast, quick to
code, easy to read, I just feel bad about adding then removing the extra
Other python newbie questions are....
Should I always return something from a function (note the return 1's)
Is use string.find on the whole string first, to see if I need to do a
string.split, thinking it would be more efficient if most of the strings
would not return a match.
Am I doing my filter modification routine correctly (see below)
list = filter('i', 'Jan", list) # only leaves items with Jan
list = filter('r', 'Jan", list) # to remove any item with Jan in it.
Here's some of my code snippits, suggestions welcome
outline = string.replace(inline, "'", "")
outline = string.replace(inline, '"', '')
outline = string.replace(outline, ",", "")
outline = string.replace(outline, "[", "")
outline = string.replace(outline, "]", "")
yr = m = dy = tm = 'z' # set to error if not converted
tt = string.split(ftpline) # returns list of year, month, day and
time all numeric for sorting
yr = str(tt)
tp = string.find(yr, ':') # current year, ftp shows time
if tp > -1:
tm = yr
yr = 2000
tm = '00:00' # use a dummy time of 00:00
dy = string.zfill(tt, 2) # zero fill date for sorting
mo = tt # convert alpha month to number for sorting
if mo == 'Jan':
m = '01'
elif mo == 'Feb':
m = '02'
elif mo == 'Mar':
m = '03'
elif mo == 'Apr':
m = '04'
elif mo == 'May':
m = '05'
elif mo == 'Jun':
m = '06'
elif mo == 'Jul':
m = '07'
elif mo == 'Aug':
m = '08'
elif mo == 'Sep':
m = '09'
elif mo == 'Oct':
m = '10'
elif mo == 'Nov':
m = '11'
elif mo == 'Dec':
m = '12'
m = '99'
outlst = [yr, m, dy, tm]
def addtoclist(thisline, pgmname, ppath):
pathstr = ' (' + ppath + ')'
tl = string.split(thisline)
q = string.find(thisline, pgmname)
if q > -1: # Check for match in entire line
tln = str(tl[-1])
q = string.find(tln, pgmname)
if q > -1: # make sure match was from Name portion of line
dl = getdatelist(thisline)
sz = string.rjust(str(tl), 7) # the size
dl.append(sz) # append the size to aid in comparison of files
dl.append(tln) # append name onto list
clist.append(str(dl)) # add to tlist for sorting
return 1 # default always return true
def filter(ftype, txt, chklist): # after the initial display, this
allows lines to be removed by supplying a string that is either
included, or to be removed.
newlist =  # I want to modify the supplied
for l in chklist:
x = string.find(l, txt)
if ftype == 'i':
if x >= 0:
if x < 0:
list = newlist[:]
def showfound(curlist, title, count): # count is a maximum number of
items, if -1 display the entire list
tc = len(curlist) # count of items in list
if tc == 0:
print 'No records found '
if count == -1: # a -1 means print the whole list
count = tc
if count > tc: # if there are fewer items in list, reset count
count = tc # avoid a subscript error
i = 1
while i: # lists are relative 0 subscripts so we subtract 1
o = cleanline(curlist[i-1]) # remove list delimeters
i2 = string.rjust(str(i), 3) # line number
print i2, o
i = i + 1
if i > count:
if i % 20 == 0:
c = raw_input("Press return to continue ") # pause every
20 items to view display
if c == 'q'or c == 'Q': # q quits
doyen at mediaone.net
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