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Added join() and joinfields() functions.

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Fixed center().
Rewrote ljust() and rjust().
This commit is contained in:
Guido van Rossum 1991-04-07 13:42:19 +00:00
parent 2d844d1ddc
commit fac38b7c40
2 changed files with 54 additions and 18 deletions
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36
Lib/string.py
View file

@ -79,6 +79,20 @@ def splitfields(s, sep):
res.append(s[i:]) res.append(s[i:])
return res return res
# Join words with spaces between them
def join(words):
res = ''
for w in words:
res = res + (' ' + w)
return res[1:]
# Join fields with separator
def joinfields(words, sep):
res = ''
for w in words:
res = res + (sep + w)
return res[len(sep):]
# Find substring # Find substring
index_error = 'substring not found in string.index' index_error = 'substring not found in string.index'
def index(s, sub): def index(s, sub):
@ -99,21 +113,25 @@ def atoi(str):
# Left-justify a string # Left-justify a string
def ljust(s, width): def ljust(s, width):
n = len(s) n = width - len(s)
if n >= width: return s if n <= 0: return s
return s + ' '*(width-n) return s + ' '*n
# Right-justify a string # Right-justify a string
def rjust(s, width): def rjust(s, width):
n = len(s) n = width - len(s)
if n >= width: return s if n <= 0: return s
return ' '*(width-n) + s return ' '*n + s
# Center a string # Center a string
def center(s, width): def center(s, width):
n = len(s) n = width - len(s)
if n >= width: return s if n <= 0: return s
return ' '*((width-n)/2) + s + ' '*(width -(width-n)/2) half = n/2
if n%2 and width%2:
# This ensures that center(center(s, i), j) = center(s, j)
half = half+1
return ' '*half + s + ' '*(n-half)
# Zero-fill a number, e.g., (12, 3) --> '012' and (-3, 3) --> '-03' # Zero-fill a number, e.g., (12, 3) --> '012' and (-3, 3) --> '-03'
# Decadent feature: the argument may be a string or a number # Decadent feature: the argument may be a string or a number

36
Lib/stringold.py
View file

@ -79,6 +79,20 @@ def splitfields(s, sep):
res.append(s[i:]) res.append(s[i:])
return res return res
# Join words with spaces between them
def join(words):
res = ''
for w in words:
res = res + (' ' + w)
return res[1:]
# Join fields with separator
def joinfields(words, sep):
res = ''
for w in words:
res = res + (sep + w)
return res[len(sep):]
# Find substring # Find substring
index_error = 'substring not found in string.index' index_error = 'substring not found in string.index'
def index(s, sub): def index(s, sub):
@ -99,21 +113,25 @@ def atoi(str):
# Left-justify a string # Left-justify a string
def ljust(s, width): def ljust(s, width):
n = len(s) n = width - len(s)
if n >= width: return s if n <= 0: return s
return s + ' '*(width-n) return s + ' '*n
# Right-justify a string # Right-justify a string
def rjust(s, width): def rjust(s, width):
n = len(s) n = width - len(s)
if n >= width: return s if n <= 0: return s
return ' '*(width-n) + s return ' '*n + s
# Center a string # Center a string
def center(s, width): def center(s, width):
n = len(s) n = width - len(s)
if n >= width: return s if n <= 0: return s
return ' '*((width-n)/2) + s + ' '*(width -(width-n)/2) half = n/2
if n%2 and width%2:
# This ensures that center(center(s, i), j) = center(s, j)
half = half+1
return ' '*half + s + ' '*(n-half)
# Zero-fill a number, e.g., (12, 3) --> '012' and (-3, 3) --> '-03' # Zero-fill a number, e.g., (12, 3) --> '012' and (-3, 3) --> '-03'
# Decadent feature: the argument may be a string or a number # Decadent feature: the argument may be a string or a number